DOC AIRBUS | TSM A320FActive Bypass Directional Control Valve Solenoid Electrical Failure Channel A
TASK 73-11-00-810-847-A
Active Bypass Directional Control Valve Solenoid Electrical Failure Channel A
1. Possible Causes
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Fault Confirmation
Subtask 73-11-00-710-107-A ** ON A/C NOT FOR ALL
Subtask 73-11-00-860-095-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:41:10 UTC
Active Bypass Directional Control Valve Solenoid Electrical Failure Channel A
1. Possible Causes
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | MULTIMETER - STANDARD |
| No specific | 1 | PLIERS - JAWED, SOFT |
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 71-00-00-810-834-A | General Troubleshooting Guidelines for Additional Troubleshooting Information |
| TSM TASK 71-00-00-810-835-A | Component and Harness Intermittent Troubleshooting Procedure for Guidance Troubleshooting Intermittent Faults |
| AMM 70-70-00-910-803 | SPOP 6 - Cleaning of the Contact Points and Wiring Harnesses |
| AMM 73-11-01-000-801 | Removal of the Integrated Fuel Pump and Control (IFPC) |
| AMM 73-11-01-400-801 | Installation of the Integrated Fuel Pump and Control (IFPC) |
| AMM 73-21-00-710-806 | Test No.7 - EEC Operation Test (Self Test) |
| AMM 73-21-01-000-801 | Removal of the Electronic Engine Control (EEC) |
| AMM 73-21-01-400-801 | Installation of the Electronic Engine Control (EEC) |
| AMM 73-21-64-000-802 | Removal of the Electronic Engine Control (EEC) Wiring Harness (W04) |
| AMM 73-21-64-400-802 | Installation of the Electronic Engine Control (EEC) Wiring Harness (W04) |
| AMM 73-21-68-000-802 | Removal of the EEC Wiring Harness (WC08) |
| AMM 73-21-68-400-802 | Installation of the EEC Wiring Harness (WC08) |
| AMM 78-36-00-010-802 | Opening of the Thrust Reverser Cowl-Doors |
| AMM 78-36-00-410-802 | Closing of the Thrust Reverser Cowl-Doors |
EEC Wiring HarnessesSubtask 73-11-00-710-107-A ** ON A/C NOT FOR ALL
A. Do the EEC system interactive test to confirm this fault. Refer to FADEC self test AMM 73-21-00-710-806.
(a) If no problems are found, return the engine to service. Monitor the engine for reoccurring maintenance message.
(2) If the maintenance message comes back (hard fault), go to the Para. Fault Isolation.
4. Fault IsolationNOTE: The Electronic Engine Control (EEC) has detected the Bypass Directional Control Valve (DCV) solenoid circuit for the Integrated Fuel Pump and Control (IFPC) is out of range or rate in channel A. The Bypass DCV is integral to the integrated fuel pump and control. The integrated fuel pump and control is attached to the fuel manifold located on the top of the main gearbox at the 4 o'clock position.
(1) If the maintenance message does not come back, examine the harnesses and electrical connectors as described in the component and harness intermittent fault isolation procedure (Ref. TSM TASK 71-00-00-810-835). - Refer to the general troubleshooting guidelines for additional troubleshooting information (Ref. TSM TASK 71-00-00-810-834).
- Refer to the component and harness intermittent troubleshooting procedure for guidance troubleshooting intermittent faults (Ref. TSM TASK 71-00-00-810-835).
(a) If no problems are found, return the engine to service. Monitor the engine for reoccurring maintenance message.
(2) If the maintenance message comes back (hard fault), go to the Para. Fault Isolation.
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.
WARNING:
REFER TO THE MSDS FOR ALL MATERIAL USED AND THE MANUFACTURER'S SAFETY INSTRUCTIONS FOR ALL EQUIPMENT USED. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.
CAUTION:
MAKE SURE YOU REMOVE ELECTRICAL POWER FROM THE EEC BEFORE YOU REMOVE THE ELECTRICAL CONNECTORS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EEC CAN OCCUR.
Subtask 73-11-00-810-107-A ** ON A/C NOT FOR ALL A. If there is confirmation of the fault:
(1) Open the thrust reverser cowl-doors AMM 78-36-00-010-802.
(2) Examine the W04 (4088KS) and WC08 (4094KS) harnesses, connector P13 (4000KS-P13) - EEC (4000KS), interconnect J109 (4112VC)/P109 (4112VC-A) and connector P15 (4360KS-P15) - Integrated fuel pump and control (4360KS), for problems which are possible between the EEC (4000KS) and the integrated fuel pump and control (4360KS).
(a) Inspect for harness damage.
(b) Inspect for loose or damaged connectors.
1 Replace W04 HARNESS(4088KS) AMM 73-21-64-000-802 and AMM 73-21-64-400-802, or
2 Replace WC08 HARNESS-CORE(4094KS) AMM 73-21-68-000-802 and AMM 73-21-68-400-802.
3 Do the test given in Para. 3.
(3) If no problems are found with the harnesses or the fault continue, use a PLIERS - JAWED, SOFT to disconnect the electrical connector P13 (4000KS-P13) from the EEC (4000KS), interconnect J109 (4112VC)/P109 (4112VC-A) and connector P15 (4360KS-P15) from the integrated fuel pump and control (4360KS).
(a) Examine the pins and sockets (contacts) for alignment and damage. Look for contacts pushed rearward into the connector face. Replace parts as necessary.
(b) Clean the contacts with contact cleaner and clean cloth per SPOP 6. Blow dry with air (at less than 30 psi) across the connector face AMM 70-70-00-910-803.
(c) Reconnect the electrical connector P13 (4000KS-P13) to the EEC (4000KS), interconnect J109 (4112VC)/P109 (4112VC-A) and connector P15 (4360KS-P15) to the integrated fuel pump and control (4360KS).
(d) Do the test given in Para. 3.
(4) If the fault continues:
(a) Replace INTEGRATED FUEL PUMP AND CONTROL [4360KS] AMM 73-11-01-000-801 and AMM 73-11-01-400-801.
(b) Do the test given in Para. 3.
(5) If the fault continues:
(a) Disconnect the electrical connector P13 (4000KS-P13) from the EEC (4000KS), interconnect J109 (4112VC)/P109 (4112VC-A) and connector P15 (4360KS-P15) from the integrated fuel pump and control (4360KS). Use a MULTIMETER - STANDARD to test the integrated fuel pump and control Bypass DCV solenoid circuits in the harnesses. Refer to Table 1. Look for:
1 Wire-to-wire shorts
2 Shorts to ground
3 Continuity (less than 5 ohms resistance).
(b) If a problem is found with the harnesses or connectors:
1 Replace W04 HARNESS [4088KS] AMM 73-21-64-000-802 and AMM 73-21-64-400-802, or
2 Replace WC08 HARNESS-CORE [4094KS] AMM 73-21-68-000-802 and AMM 73-21-68-400-802.
3 Do the test given in Para. 3.
(6) If no problems are found with the harnesses or the fault continues,
(a) Replace
(b) Do the test given in Para. 3.
5. Close-up(1) Open the thrust reverser cowl-doors AMM 78-36-00-010-802.
(2) Examine the W04 (4088KS) and WC08 (4094KS) harnesses, connector P13 (4000KS-P13) - EEC (4000KS), interconnect J109 (4112VC)/P109 (4112VC-A) and connector P15 (4360KS-P15) - Integrated fuel pump and control (4360KS), for problems which are possible between the EEC (4000KS) and the integrated fuel pump and control (4360KS).
(a) Inspect for harness damage.
(b) Inspect for loose or damaged connectors.
NOTE: Loose connectors must be disconnected and examined for further wear or damage.
(c) If a problem is found with the harnesses or connectors: 1 Replace W04 HARNESS(4088KS) AMM 73-21-64-000-802 and AMM 73-21-64-400-802, or
2 Replace WC08 HARNESS-CORE(4094KS) AMM 73-21-68-000-802 and AMM 73-21-68-400-802.
3 Do the test given in Para. 3.
(3) If no problems are found with the harnesses or the fault continue, use a PLIERS - JAWED, SOFT to disconnect the electrical connector P13 (4000KS-P13) from the EEC (4000KS), interconnect J109 (4112VC)/P109 (4112VC-A) and connector P15 (4360KS-P15) from the integrated fuel pump and control (4360KS).
(a) Examine the pins and sockets (contacts) for alignment and damage. Look for contacts pushed rearward into the connector face. Replace parts as necessary.
(b) Clean the contacts with contact cleaner and clean cloth per SPOP 6. Blow dry with air (at less than 30 psi) across the connector face AMM 70-70-00-910-803.
(c) Reconnect the electrical connector P13 (4000KS-P13) to the EEC (4000KS), interconnect J109 (4112VC)/P109 (4112VC-A) and connector P15 (4360KS-P15) to the integrated fuel pump and control (4360KS).
(d) Do the test given in Para. 3.
(4) If the fault continues:
(a) Replace INTEGRATED FUEL PUMP AND CONTROL [4360KS] AMM 73-11-01-000-801 and AMM 73-11-01-400-801.
(b) Do the test given in Para. 3.
(5) If the fault continues:
(a) Disconnect the electrical connector P13 (4000KS-P13) from the EEC (4000KS), interconnect J109 (4112VC)/P109 (4112VC-A) and connector P15 (4360KS-P15) from the integrated fuel pump and control (4360KS). Use a MULTIMETER - STANDARD to test the integrated fuel pump and control Bypass DCV solenoid circuits in the harnesses. Refer to Table 1. Look for:
1 Wire-to-wire shorts
2 Shorts to ground
3 Continuity (less than 5 ohms resistance).
NOTE: A short to ground is found when the resistance is less than 100 000 (100K) ohms.
Table 1: Integrated Fuel Pump and Control Bypass DCV Solenoid Channel A Connector Contacts | W04 (4088KS) Harness P13 (4000KS-P13) EEC (4000KS) Connector Contacts | W04 (4088KS) Harness J109 (4112VC) Connector Contacts | WC08 (4094KS) Harness P109 (4112VC-A) Connector Contacts | WC08 (4094KS) Harness P15 (4360KS-P15) IFPC (4360KS) Connector Contacts |
|---|---|---|---|
| GG | 24 | 24 | 3 |
| v | 25 | 25 | 12 |
1 Replace W04 HARNESS [4088KS] AMM 73-21-64-000-802 and AMM 73-21-64-400-802, or
2 Replace WC08 HARNESS-CORE [4094KS] AMM 73-21-68-000-802 and AMM 73-21-68-400-802.
3 Do the test given in Para. 3.
(6) If no problems are found with the harnesses or the fault continues,
(a) Replace
(b) Do the test given in Para. 3.
Subtask 73-11-00-860-095-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(a) Close the thrust reverser cowl-doors AMM 78-36-00-410-802.
(1) Make sure that the work area is clean and clear of tools and other items.
(a) Close the thrust reverser cowl-doors AMM 78-36-00-410-802.