DOC AIRBUS | TSM A320FFailure of the Fuel Diverter and Return Valve on Engine 1
1. Possible Causes
NOTE: This task is to troubleshoot the Clear Language Message (CLM) FUL DIV RET VLV/HC/EEC1. The fault
acronyms listed in the fault confirmation section below will help you to focus on the correct cause of this
CLM.
· harness
· VALVE-FUEL DIVERTER AND RETURN ( 4018KS )
· EEC ( 4000KS )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
73-00-00-810-900-B Multiple Dual Track Check Faults on the Engine 1
Ref. AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power
Ref. AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External
Power
Ref. AMM 31-60-00-860-002 EIS Stop Procedure
Ref. AMM 70-23-15-912-010 Connection of Electrical Connectors
Ref. AMM 71-00-00-710-013 Test No.11 : High Power Assurance Test
Ref. AMM 71-13-00-010-010 Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
Ref. AMM 71-13-00-410-010 Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
Ref. AMM 71-50-00-210-010 Wire Harness Visual Inspection - All Power Plant Electrical Cables
Ref. AMM 73-13-42-000-010 Removal of the Fuel Diverter and Return Valve
Ref. AMM 73-13-42-400-010 Installation of the Fuel Diverter and Return Valve
Ref. AMM 73-22-00-710-040 Operational Test of the FADEC SYSTEM on the Ground
Ref. AMM 73-22-34-000-010 Removal of the Electronic Engine Control (EEC)
Ref. AMM 73-22-34-400-010 Installation of the Electronic Engine Control (EEC)
Ref. ASM 73-25-18
Ref. AMM 78-32-00-010-010 Opening of the Thrust Reverser Halves
70-00-00-03-13 STANDARD PRACTICES - ENGINE - GENERAL - TASK SUPPORTING
DATA
Fuel Diverter and Return Valve SHEET 1
Figure 73(IAE)-00-00-991-00300-A / SHEET 1/1 - Fuel Diverter and Return Valve not printed, as per
printing preferences
3. Fault Confirmation
Subtask 73-00-00-860-199-A
A. Job Set-Up
(1) Energize the aircraft electrical circuits
Ref. AMM 24-41-00-861-002 .
(2) On the ENG section of the maintenance panel 50VU, select FADEC GND PWR pushbutton switch to
the ON position.
Subtask 73-00-00-710-301-A
B. Identify Test to Make Sure the Fault is Present
NOTE: Troubleshooting can start immediately without doing the fault confirmation if this CLM was shown
in multiple flight or ground legs.
(1) Do the CFDS message decoding and read the scheduled maintenance report to identify the fault
acronym related to the CLM (Ref. TSM 70-00-00-03) .
(2) If the readout gives fault acronym FDVWAF or SPVWAF in FADEC 1A or FADEC 1B, do the
operational test of FADEC system on the ground for fault confirmation Ref. AMM 73-22-00-710-040 .
(a) If the test gives the fault acronym FDVWAF in FADEC 1A or FADEC 1B, or there are two or more
occurrences in fault history, continue with fault isolation Para. 4.A.
(b) If the test gives the fault acronym SPVWAF in FADEC 1A or FADEC 1B, or there are two or more
occurrences in fault history, continue with fault isolation Para. 4.B.
(c) If the test gives the fault acronym SPVL in FADEC 1A or FADEC 1B, or there are two or more
occurrences in the fault history, continue with Fault Isolation Para. 4.C.
(d) If the test gives the fault acronym SPVLXCF in FADEC 1A or FADEC 1B , or there are two or
more occurrences in the fault history, continue with Fault Isolation Para. 4.D.
(e) If the test gives the fault acronym FDVXCF in FADEC 1A or FADEC 1B, or there are two or more
occurrences in the fault history, continue with Fault Isolation Para. 4.E.
(f) If the test does not give the fault acronym FDVWAF, fault acronym SPVWAF, fault acronym
SPVL, fault acronym SPVXCF or fault acronym FDVXCF and there is no history of faults, return
the engine to service.
(3) If the readout gives the fault acronym SPVTK or fault acronym SPVFO in FADEC 1A or FADEC 1B,
do the steps in Paragraph 3C for fault confirmation.
(a) If the test gives the fault acronym SPVTK, or there are two or more occurrences in the fault
history, continue with Fault Isolation Para. 4F.
(b) If the test gives the fault acronym SPVFO, or there are two or more occurrences in the fault
history, continue with Fault Isolation Para. 4F.
(c) If the test does not give the fault acronym SPVTK or fault acronym SPVFO, and there is no
history of faults, return the engine to service.
Subtask 73-00-00-710-351-A
C. Test for Fault Acronym SPVTK and Fault Acronym SPVFO
(1) Do a high power assurance test for fault confirmation as follows:
(a) On overhead panel 50VU, select ENG/FADEC GND PWR/1 pushbutton switch to the ON
position.
NOTE: This action resets the FADEC memory.
(b) Do the test No. 11: high power assurance test Ref. AMM 71-00-00-710-013 .
(c) Read the LAST LEG REPORT of the FADEC (1A and 1B) menu on the MCDU
(Ref. TSM 70-00-00-03) .
1 Make a record of the failure message.
2 Make a record of the channel FADEC 1A or FADEC 1B which found the fault.
3 Do the CFDS message decoding and read the Flight Data and Ground Data to identify the
fault acronym.
NOTE: Multiple Dual Track Check Faults may indicate a failed fuel pump. Four control units
on the engine are driven by HP fuel: the VSV actuator, the 2.5 bleed controller, the
ACOC air modulating valve and the active clearance control actuator. If you have
faults with two or more of these units, you must follow the Multiple Dual Track check
faults procedure (Ref. TSM 73-00-00-810-900) .
4. Fault Isolation
(Ref. Fig. Fuel Diverter and Return Valve SHEET 1)
Subtask 73-00-00-810-210-A
WARNING: MAKE SURE THAT THE FADEC IS DE-ENERGIZED. IF IT IS ENERGIZED, THERE IS A
RISK OF INJURY OR DAMAGE.
A. Fault Isolation for Fault Acronym FDVWAF
A solenoid Wrap Around Fault (WAF) was found in channel A or B. The circuit for the fuel diverter and
return valve is open, short to ground or has a wire to wire short.
NOTE: After each step that is done during this procedure, you can do the steps in Para. 3. to make sure
the fault is corrected.
NOTE: Disconnection and connection of the electrical connectors can correct this fault.
(1) If the fault was found in channel A, do the steps that follow:
(a) Visually examine the harness from the EEC connector (4000KS-J5) to the fuel diverter and return
valve (4018KS) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness , repair or replace as necessary.
(b) If no problems were found with the harness, disconnect electrical connector (4018KS-B) from
the fuel diverter and return valve (4018KS) Ref. AMM 71-50-00-210-010 . Examine the male and
female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(c) Do this electrical check of the channel A solenoid circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts E and V are not shorted to ground.
2 Make sure that contacts E and V are not shorted to other contacts in the connector.
3 Make sure that the resistance from contact E to contact V is between 60 and 70 ohms.
4 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(d) If no problems were found, disconnect electrical connector (4000KS-J5) from the EEC (4000KS)
Ref. AMM 71-50-00-210-010 . Examine the male and female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(e) Do this electrical check of the solenoid wiring in the channel A harness. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Diverter Valve Solenoid Circuit Channel A Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-B 4000KS-J5
Contacts Contacts
E F
V a
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(f) Install all removed connectors Ref. AMM 70-23-15-912-010 .
(g) Do the test for this fault, listed in Para. 3. for fault confirmation.
1 If the test does not give the fault acronym FDVWAF, send the engine back to service.
2 If the test gives the fault acronym FDVWAF, remove and replace the VALVE-FUEL
DIVERTER AND RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref.
AMM 73-13-42-400-010 .
3 If this fault continues, remove and replace the EEC ( 4000KS ) Ref.
AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
(2) If the fault was found in channel B, do the steps that follow:
(a) Visually examine the harness from the EEC connector (4000KS-J11) to the fuel diverter and
return valve (4018KS) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness, repair or replace as necessary.
(b) If no problems were found with the harness, disconnect electrical connector (4018KS-B) from
the fuel diverter and return valve (4018KS) Ref. AMM 71-50-00-210-010 . Examine the male and
female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness pin into each socket. You must feel friction
when you insert and remove the pin.
4 Repair as necessary.
(c) Do this electrical check of the channel B solenoid circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18.
1 Make sure that contacts M and N are not shorted to ground.
2 Make sure that contacts M and N are not shorted to other contacts in the connector.
3 Make sure the resistance from contact M to contact N is between 48 and 78 ohms.
4 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(d) If no problems were found, disconnect electrical connector (4000KS-J11) from the EEC (4000KS)
Ref. AMM 71-50-00-210-010 . Examine the male and female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(e) Do this electrical check of the solenoid wiring in the channel B harness. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Diverter Valve Solenoid Circuit Channel B Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-B 4000KS-J11
Contacts Contacts
M F
N a
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(f) Install all removed connectors Ref. AMM 70-23-15-912-010 .
(g) Do the test for this fault, listed in Para. 3. for fault confirmation.
1 If the test does not give the fault acronym FDVWAF, send the engine back to service.
2 If the test gives the fault acronym FDVWAF, remove and replace the VALVE-FUEL
DIVERTER AND RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref.
AMM 73-13-42-400-010 .
3 If this fault continues, remove and replace the EEC ( 4000KS ) Ref.
AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
Subtask 73-00-00-810-249-A
B. Fault Isolation for Fault Acronym SPVWAF
A torque motor Wrap Around Fault (WAF) was found in channel A or B. The circuit for the fuel diverter and
return valve is open, short to ground or has a wire to wire short.
NOTE: After each step that is done during this procedure, you can do the steps in Para. 3. to make sure
the fault is corrected.
NOTE: Disconnection and connection of the electrical connectors can correct this fault.
(1) If the fault was found in channel A, do the steps that follow:
(a) Visually examine the harness from the EEC connector (4000KS-J3) to the fuel diverter and return
valve (4018KS) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness, repair or replace as necessary.
(b) If no problems were found with the harness, disconnect electrical connector (4018KS-B) from
the fuel diverter and return valve (4018KS) Ref. AMM 71-50-00-210-010 . Examine the male and
female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(c) Do this electrical check of the channel A torque motor circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts H and G are not shorted to ground.
2 Make sure that contacts H and G are not shorted to other contacts in the connector.
3 Make sure that the resistance from contact H to contact G is between 70 and 100 ohms.
4 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(d) If no problems were found, disconnect electrical connector (4000KS-J3) from the EEC (4000KS)
Ref. AMM 71-50-00-210-010 . Examine the male and female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(e) Do this electrical check of the torque motor wiring in the channel A harness. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Return Valve Torque Motor Circuit Channel A Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-B 4000KS-J3
Contacts Contacts
H L
G e
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(f) Install all removed connectors Ref. AMM 70-23-15-912-010 .
(g) Do the test for this fault, listed in Para. 3. for fault confirmation.
1 If the test does not give the fault acronym SPVWAF, send the engine back to service.
2 If the test gives the fault acronym SPVWAF, remove and replace the VALVE-FUEL
DIVERTER AND RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref.
AMM 73-13-42-400-010 .
3 If this fault continues, remove and replace the EEC ( 4000KS ) Ref.
AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
(2) If the fault was found in channel B, do the steps that follow:
(a) Visually examine the harness from the EEC connector (4000KS-J9) to the fuel diverter and return
valve (4018KS) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness, repair or replace as necessary.
(b) If no problems were found with the harness, disconnect electrical connector (4018KS-B) from
the fuel diverter and return valve (4018KS) Ref. AMM 71-50-00-210-010 . Examine the male and
female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(c) Do this electrical check of the channel B torque motor circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts K and Y are not shorted to ground.
2 Make sure that contacts K and Y are not shorted to other contacts in the connector.
3 Make sure that the resistance from contact K to contact Y is between 70 and 100 ohms.
4 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(d) If no problems were found, disconnect electrical connector (4000KS-J9) from the EEC (4000KS)
Ref. AMM 71-50-00-210-010 . Examine the male and female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(e) Do this electrical check of the torque motor wiring in the channel B harness. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Return Valve Torque Motor Circuit Channel B Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-B 4000KS-J9
Contacts Contacts
K L
Y e
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(f) Install all removed connectors Ref. AMM 70-23-15-912-010 .
(g) Do the test for this fault, listed in Para. 3. for fault confirmation.
1 If the test does not give the fault acronym SPVWAF, send the engine back to service.
2 If the test gives the fault acronym SPVWAF, remove and replace the VALVE-FUEL
DIVERTER AND RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref.
AMM 73-13-42-400-010 .
3 If this fault continues, remove and replace the EEC ( 4000KS ) Ref.
AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
Subtask 73-00-00-810-250-A
WARNING: MAKE SURE THAT THE FADEC IS DE-ENERGIZED. IF IT IS ENERGIZED, THERE IS A
RISK OF INJURY OR DAMAGE.
C. Fault Isolation for Fault Acronym SPVL
The fuel diverter and return valve LVDT signal is out of range. This is caused by an open, short to ground
or a wire to wire short in this circuit.
NOTE: After each step that is done during this procedure, you can do the steps in Para. 3. to make sure
the fault is corrected.
NOTE: Disconnection and connection of the electrical connectors can correct this fault.
(1) If the fault was found in channel A, do the steps that follow:
(a) Visually examine the harness from the EEC connector (4000KS-J4) to the fuel diverter and return
valve (4018KS) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness, repair or replace as necessary.
(b) If no problems were found with the harness, disconnect electrical connector (4018KS-A) from
the fuel diverter and return valve (4018KS) Ref. AMM 71-50-00-210-010 . Examine the male and
female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(c) Do this electrical check of the channel A LVDT circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts B, C, L and M are not shorted to ground.
2 Make sure that contacts B, C, L and M are not shorted to other contacts in the connector.
3 Make sure that the resistance from contact B to contact C is between 105 and 125 ohms.
4 Make sure that the resistance from contact L to contact M is between 219 and 258 ohms.
5 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(d) If no problems were found, disconnect electrical connector (4000KS-J4) from the EEC (4000KS)
Ref. AMM 71-50-00-210-010 . Examine the male and female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(e) Do this electrical check of the LVDT harness in channel A. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Return Valve LVDT Circuit Channel A Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-B 4000KS-J4
Contacts Contacts
B S
C T
L P
M R
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(f) Install all removed connectors Ref. AMM 70-23-15-912-010 .
(g) Do the test for this fault, listed in Para. 3. for fault confirmation.
1 If the test does not give the fault acronym SPVL, send the engine back to service.
2 If the test gives the fault acronym SPVL, remove and replace the VALVE-FUEL DIVERTER
AND RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
3 If this fault continues, remove and replace the EEC ( 4000KS ) Ref.
AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
(2) If the fault was found in channel B, do the steps that follow:
(a) Visually examine the harness from the EEC connector (4000KS-J10) to the fuel diverter and
return valve (4018KS) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness, repair or replace as necessary.
(b) If no problems were found with the harness, disconnect electrical connector (4018KS-A) from
the fuel diverter and return valve (4018KS) Ref. AMM 71-50-00-210-010 . Examine the male and
female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(c) Do this electrical check of the channel B LVDT circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts E, F, H and J are not shorted to ground.
2 Make sure that contacts E, F, H and J are not shorted to other contacts in the connector.
3 Make sure that the resistance from contact E to contact F is between 105 and 125 ohms.
4 Make sure that the resistance from contact H to contact J is between 219 and 258 ohms.
5 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(d) If no problems were found, disconnect electrical connector (4000KS-J10) from the EEC (4000KS)
Ref. AMM 71-50-00-210-010 . Examine the male and female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(e) Do this electrical check of the LVDT harness in channel B. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Return Valve LVDT Circuit Channel B Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-A 4000KS-J10
Contacts Contacts
E S
F T
H P
J R
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(f) Install all removed connectors Ref. AMM 70-23-15-912-010 .
(g) Do the test for this fault, listed in Para. 3. for fault confirmation.
1 If the test does not give the fault acronym SPVL, send the engine back to service.
2 If the test gives the fault acronym SPVL, remove and replace the VALVE-FUEL DIVERTER
AND RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
3 If this fault continues, remove and replace the EEC ( 4000KS ) Ref.
AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
Subtask 73-00-00-810-251-A
WARNING: MAKE SURE THAT THE FADEC IS DE-ENERGIZED. IF IT IS ENERGIZED, THERE IS A
RISK OF INJURY OR DAMAGE.
D. Fault Isolation for Fault Acronym SPVXCF
The fuel diverter and return valve position signal does not agree with the signal from the opposite channel.
This crosscheck fault (XCF) is caused by an open, short to ground, or a wire to wire short in this circuit.
This fault will always be set in both channels.
NOTE: After each step that is done during this procedure, you can do the steps in Para. 3. to make sure
the fault is corrected.
NOTE: Disconnection and connection of the electrical connectors can correct this fault.
(1) Do the steps that follow:
(a) Visually examine the harness from the channel A EEC connector (4000KS-J4) to the VALVEFUEL
DIVERTER AND RETURN ( 4018KS ) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness, repair or replace as necessary.
(b) Visually examine the harness from the channel B EEC connector (4000KS-J10) to the fuel
diverter and return valve (4018KS) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness, repair or replace as necessary.
(c) If no problems were found with the harness, disconnect electrical connector (4018KS-A) from
the fuel diverter and return valve (4018KS) Ref. AMM 71-50-00-210-010 . Examine the male and
female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(d) Do this electrical check of the channel A LVDT circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts B,C,L and M are not shorted to ground.
2 Make sure that contacts B,C,L and M are not shorted to other contacts in the connector.
3 Make sure the resistance from contact B to contact C is between 105 and 125 ohms.
4 Make sure the resistance from contact L to contact M is between 219 and 258 ohms.
5 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(e) Do this electrical check of the channel B LVDT circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts E,F,H and J are not shorted to ground.
2 Make sure that contacts E,F,H and J are not shorted to other contacts in the connector.
3 Make sure the resistance from contact E to contact F is between 105 and 125 ohms.
4 Make sure the resistance from contact H to contact J is between 219 and 258 ohms.
5 If a problem was found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(f) If no problems were found with the fuel diverter and return valve (4018KS), disconnect electrical
connector (4000KS-J4) from the EEC (4000KS) Ref. AMM 71-50-00-210-010 . Examine the male
and female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(g) Do this electrical check of the LVDT harness in channel A. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Return Valve LVDT Circuit Channel A Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-A 4000KS-J4
Fuel Return Valve LVDT Circuit Channel A Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
Contacts Contacts
B S
C T
L P
M R
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(h) If no problems were found, disconnect electrical connector (4000KS-J10) from the EEC (4000KS)
Ref. AMM 71-50-00-210-010 . Examine the male and female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(i) Do this electrical check of the LVDT harness in channel B. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Return Valve LVDT Circuit Channel B Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-A 4000KS-J10
Contacts Contacts
E S
F T
H P
J R
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(j) Install all removed connectors Ref. AMM 70-23-15-912-010 .
(k) Do the test for this fault, listed in Para. 3. for fault confirmation.
1 If the test does not give the fault acronym SPVXCF, send the engine back to service.
2 If the test gives the fault acronym SPVXCF, remove and replace the VALVE-FUEL
DIVERTER AND RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref.
AMM 73-13-42-400-010 .
3 If this fault continues, remove and replace the EEC ( 4000KS ) Ref.
AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
Subtask 73-00-00-810-252-A
E. Fault Isolation for Fault Acronym FDVXCF
The fuel diverter and return valve position signal does not agree with the signal from the opposite channel.
This crosscheck fault (XCF) is caused by an open, short to ground or a wire to wire short in this circuit.
This fault will always be set in both channels.
NOTE: After each step that is done during this procedure, you can do the steps in Para. 3. to make sure
the fault is corrected.
NOTE: Disconnection and connection of the electrical connectors can correct this fault.
(1) Do the steps that follow:
(a) Visually examine the harness from the channel A EEC connector (4000KS-J2) to the fuel diverter
and return valve (4018KS) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness, repair or replace as necessary.
(b) Visually examine the harness from the channel B EEC connector (4000KS-J8) to the fuel diverter
and return valve (4018KS) Ref. AMM 71-50-00-210-010 :
1 Look for harness damage.
2 Look for loose or damaged connectors.
3 Look for loose or damaged backshells.
NOTE: Loose backshells must be disassembled and examined for internal wire chafing.
4 If a problem is found with the harness, repair or replace as necessary.
(c) If no problems were found with the harness, disconnect electrical connector (4018KS-B) from
the fuel diverter and return valve (4018KS) Ref. AMM 71-50-00-210-010 . Examine the male and
female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(d) Do this electrical check of the channel A microswitch circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts B and C are not shorted to ground.
2 Make sure that contacts B and C are not shorted to other contacts in the connector.
3 Make sure that the resistance from contact B to contact C is between 0 and 50 ohms.
4 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(e) Do this electrical check of the channel A solenoid circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts E and V are not shorted to ground.
2 Make sure that contacts E and V are not shorted to other contacts in the connector.
3 Make sure that the resistance from contact E to contact V is between 60 and 70 ohms.
4 If a problem was found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(f) If no problems were found, disconnect electrical connector (4000KS-B) from the fuel diverter and
return valve (4018KS) Ref. AMM 71-50-00-210-010 . Examine the male and female parts of the
connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(g) If no problems were found, do this electrical check of the channel B microswitch circuit in the fuel
diverter-and-return valve (4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts R and S are not shorted to ground.
2 Make sure that contacts R and S are not shorted to other contacts in the connector.
3 Make sure that the resistance from contact R to contact S is between 0 and 50 ohms.
4 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(h) Do this electrical check of the channel B solenoid circuit in the fuel diverter and return valve
(4018KS) Ref. ASM 73-25-18:
1 Make sure that contacts M and N are not shorted to ground.
2 Make sure that contacts M and N are not shorted to other contacts in the connector.
3 Make sure that the resistance from contact M to contact N is between 60 and 70 ohms.
4 If a problem is found, remove and replace the VALVE-FUEL DIVERTER AND
RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(i) If no problems were found with the fuel diverter and return valve (4018KS), disconnect electrical
connectors (4000KS-J2) and (4000KS-J5) from the EEC (4000KS) Ref. AMM 71-50-00-210-010 .
Examine the male and female parts of the connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(j) Do this electrical check of the microswitch and solenoid harness in channel A. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Return Valve Micro-switch Circuit Channel A Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-B 4000KS-J2
Contacts Contacts
B r
C t
Fuel Return Valve Solenoid Circuit Channel A Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-B 4000KS-J5
Contacts Contacts
E F
V a
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(k) If no problems were found, disconnect electrical connector (4000KS-J8) and (4000KS-J11) from
the EEC (4000KS) Ref. AMM 71-50-00-210-010 . Examine the male and female parts of the
connection:
1 Examine pins and sockets (contacts) for alignment and damage.
2 Look for contacts pushed rearward into the connector face.
3 Look for ovalized sockets in the connector.
NOTE: This can be done by inserting a harness connector pin into each socket. You must
feel friction when you insert and remove the pin.
4 Repair as necessary.
(l) Do this electrical check of the microswitch and solenoid harness in channel B. Look for:
1 Wire to wire shorts and shorts to ground:
· Wire to wire short check: measure resistance between wires. If resistance is below
100000 (100K) ohms, then the wires are shorted and must be repaired.
· Wire to ground short check: measure resistance between wire and engine metal or
ground. If resistance is below 100000 (100K) ohms, then the wire is shorted to ground and
must be repaired.
2 Continuity:
· Continuity check: measure resistance between ends of same wire. If resistance is more
than 10 ohms, then the wire must be repaired.
NOTE: An incorrectly wired harness can cause this problem. When you test these circuits,
make sure the contacts are installed in the correct positions in each connector as
specified in the wiring diagram.
Fuel Diverter Valve Microswitch Circuit Channel B Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-B 4000KS-J8
Contacts Contacts
R r
S t
Fuel Diverter Valve Solenoid Circuit Channel B Harness
Fuel Diverter and Return Valve (4018KS) EEC (4000KS)
4018KS-B 4000KS-J11
Contacts Contacts
M F
N a
3 If a problem is found with the harness, repair or replace as necessary Ref. ASM 73-25-18.
(m) Install all removed connectors Ref. AMM 70-23-15-912-010 .
(n) Do the test for this fault, listed in Para. 3. for fault confirmation.
1 If the test does not give the fault acronym FDVXCF, send the engine back to service.
2 If the test gives the fault acronym FDVXCF, remove and replace the VALVE-FUEL
DIVERTER AND RETURN ( 4018KS ) Ref. AMM 73-13-42-000-010 and Ref.
AMM 73-13-42-400-010 .
3 If this fault continues, remove and replace the EEC ( 4000KS ) Ref.
AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
Subtask 73-00-00-810-253-A
F. Fault Isolation for Fault Acronym SPVTK or SPVFO
A track-check fault was found in channel A or B. The fuel diverter and return valve cannot move to its
commanded position or it is moving slower than normal.
NOTE: After each step that is done during this procedure, you can do the steps in Para. 3. to make sure
the fault is corrected.
NOTE: Disconnection and connection of the electrical connectors can correct this fault.
(1) Open the thrust reverser halves Ref. AMM 78-32-00-010-010 and fan cowls as necessary Ref.
AMM 71-13-00-010-010 .
(2) Remove and replace the VALVE-FUEL DIVERTER AND RETURN ( 4018KS ) Ref.
AMM 73-13-42-000-010 and Ref. AMM 73-13-42-400-010 .
(3) Do the test listed in Para. 3. for fault confirmation.
(4) If the test was satisfactory, send the engine back to service.
(5) If this fault continues, do the steps that follow:
(a) Do the steps for fault acronym SPVWAF listed in Para. 4.B.
(b) Do the steps for fault acronym SPVXCF listed in Para. 4.D.
(6) If this fault continues, remove and replace the EEC ( 4000KS ) Ref. AMM 73-22-34-000-010 and
Ref. AMM 73-22-34-400-010 .
5. Close-up
Subtask 73-00-00-860-200-A
A. Put the aircraft back to its initial configuration.
(1) Make sure that the fan cowls 437AL and 438AR are closed Ref. AMM 71-13-00-410-010 .
(2) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
Ref. AMM 31-60-00-860-002 .
(3) On the ENG section of the maintenance panel 50VU, push the FADEC GND PWR 1 pushbutton
switch.
(4) De-energize the aircraft electrical circuits
Ref. AMM 24-41-00-862-002 . [Rev.6 from Feb 2017] 2026.04.04 04:36:03 UTC