DOC AIRBUS | AMM A320FInstallation of the Electronic Control Unit (ECU) Channel A Harness 238W0904 [CFMI]
TASK 71-51-44-400-004-A
Installation of the Electronic Control Unit (ECU) Channel A Harness 238W0904
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 71-51-44-860-053-A ** ON A/C NOT FOR ALL
4. Procedure
Subtask 71-51-44-420-053-A ** ON A/C NOT FOR ALL
Subtask 71-51-44-410-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:23:18 UTC
Installation of the Electronic Control Unit (ECU) Channel A Harness 238W0904
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP8003) | lacing and tying tape |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-60-00-910-042-A | Nacelle Standard Practices |
| TASK 71-13-00-010-040-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-A | Closing of the Fan Cowl Doors |
| TASK 73-29-00-710-040-A-02 | Operational Test of the FADEC on the Ground (with Engine non Motoring) |
ECU Channel A HarnessSubtask 71-51-44-860-053-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 71-51-44-010-057-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
B. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 71-51-44-865-060-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
WARNING:
OPEN THE PROBE HEATER CIRCUIT-BREAKERS 1DA1(2), 3DA1(2,3), 4DA1(2,3) AND 5DA1(2,3) BEFORE ENG1(2)FADEC A and EIU 1(2) C/B'S 2KS1 AND 2KS2. IF YOU DO NOT OBEY THIS SEQUENCE:
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:- THE PROBES WILL BECOME TOO HOT.
- THIS CAN CAUSE DAMAGE TO EQUIPMENT AND INJURY TO MAINTENANCE PERSONNEL.
| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| 49VU | ANTI ICE/PROBES/AOA/1 | 4DA1 | D04 |
| 49VU | ANTI ICE/PROBES/PITOT/1 | 3DA1 | D02 |
| 49VU | COM/CVR/SPLY | 2RK | E14 |
| 49VU | COM/CVR/CTL | 4RK | E13 |
| 121VU | RCDR/DFDR | 7TU | K16 |
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| 122VU | ANTI ICE/WINDOWS/R | 4DG2 | W14 |
| 122VU | ANTI ICE/WINDOWS/L | 4DG1 | X14 |
| 122VU | ANTI ICE/PROBES/2/PITOT | 3DA2 | Y14 |
| 122VU | ANTI ICE/PROBES/2/AOA | 4DA2 | Y13 |
| 122VU | ANTI ICE/PROBES/2/STATIC | 5DA2 | Y11 |
| 122VU | ANTI ICE/PROBES/3/PITOT | 3DA3 | Z16 |
| 122VU | ANTI ICE/PROBES/3/AOA | 4DA3 | Z15 |
| 122VU | ANTI ICE/PROBES/3/STATIC | 5DA3 | Z14 |
| 122VU | ANTI ICE/PROBES/1/STATIC | 5DA1 | Z13 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
| FOR FIN: 1000EM1 (ENGINE1) | |||
| 49VU | ENGINE/1/FIRE DET/LOOP A | 7WD1 | A06 |
| 49VU | ENGINE/1/FADEC A/AND EIU 1 | 2KS1 | A04 |
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| 121VU | ENGINE/IGN/ENG1/SYS A BAT | 2JH1 | P39 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B | 2WE1 | Q44 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A | 1WE1 | Q43 |
| 121VU | ENGINE/ENG1/FIRE DET/LOOP B | 8WD1 | Q38 |
| 121VU | ENGINE/ENG1/FADEC B/AND EIU 1 | 4KS1 | R41 |
| 122VU | ELEC/GCU/1 | 2XU1 | T26 |
| FOR FIN: 1000EM2 (ENGINE2) | |||
| 49VU | ENGINE/2/FIRE DET/LOOP B | 8WD2 | A07 |
| 49VU | ENGINE/2/FADEC A/AND EIU 2 | 2KS2 | A05 |
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
| 121VU | ENGINE/IGN/ENG2/SYS A BAT | 2JH2 | P40 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B | 2WE2 | Q42 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A | 1WE2 | Q41 |
| 121VU | ENGINE/ENG2/FADEC B | 4KS2 | Q40 |
| 121VU | ENGINE/ENG2/FIRE DET/LOOP A | 7WD2 | Q39 |
| 122VU | ELEC/GCU/2 | 2XU2 | T27 |
Subtask 71-51-44-420-053-A ** ON A/C NOT FOR ALL
A. Installation of the ECU Channel A Harness 238W0904
(2) Put the electrical harness (5) in position on the engine.
(3) Connect the electrical connectors 402VC-A and 406VC-A to the pylon junction box. Tighten the connectors with your hand plus one-eighth turn.
(4) Put the harness (5) into the flip-lock clamp (10) and tighten the captive screws.
(5) Put the clamps (15) and (40) on the harness (5). Make sure that clamps (45) are installed correctly on the other harnesses.
(6) Attach the clamp (40) to clamps (45) with the screw (20), the washers (25) and (35) and the nut (30).
(8) TORQUE the nuts (30) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
.
(9) Attach the harness (5) to the bracket with the screws (20) and the washers (25).
(10) Attach the harness (5) to the bracket with the screws (50), the washers (25) and the clamps (55).
(11) TORQUE the screws (20) and (50) to between 22 and 20 lbf.in (0.25 and 0.23 m.daN ).
(12) Put the harness (5) into the flip-lock clamp (60) and tighten the captive screw.
(13) Put the harness (5) into the rubber insert of the line block (65).
(14) Close the line block (65) and tighten the captive screw.
(15) Put the harness (5) into the rubber insert of the line block (75).
(16) Attach the line block (75) to the bracket with the screws (70) and the washers (25).
(17) TORQUE the screws (70) to between 22 and 20 lbf.in (0.25 and 0.23 m.daN ).
(18) Put the clamp (80) on the harness (5). Attach the clamps (80) to the bracket with screw (20), the washer (25) and the nut (30).
(19) TORQUE the nut (30) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ).
(20) Connect electrical connector 4000JH1-A to the upper ignition exiter. Tighten the connector with you hand plus one-eighth turn.
(21) Put the harness (5) into the rubber insert of the line block (95).
(22) Attach the line block (95) to the bracket with the screws (90) and the washers (25) and the nuts (30).
(23) Put the harness (5) into the rubber inserts of the remaining line blocks (65).
(24) Close the line blocks (65) and tighten the captive screws.
(25) Connect the electrical connectors 4000KS-J1 and 4000KS-J3 to the ECU. Tighten the connectors with your hand plus one-eighth turn.
(26) Install the clamps (85) and (115) on the harness (5).
(27) Attach the clamps ((85) and (115) together with the screw (50), the washers (25) and (35) and the nut (30).
(28) Put the harness (5) into the rubber inserts of the line block (110).
(29) Attach the line block (110) to the bracket with the screws (100) and (105) and the washers (25).
(30) Install the clamp (125) on the harness (5). Make sure the other clamps (85) and (130) are installed on the harnesses.
(31) Attach the clamps (85), (125) and (130) together with the screw (120), the washers (25) and (35) and the nut (30).
.
(33) Put the harness (5) into the rubber insert of the line block (140).
(34) Attach the line block (140) to the bracket with the screws (135) and the washers (25).
(35) TORQUE the screws (100) and (135) to between 22 and 20 lbf.in (0.25 and 0.23 m.daN ).
(36) Connect the electrical connector 4004VC-A to the transition box. Tighten the connector with your hand plus one-eighth turn.
(37) Use lacing and tying tape (Material No.CP8003) to hold cables from 4004VC-A, 4000KS-J6 and 4003VC-A connectors together near end of support tube.
(38) Examine the harness installation and make sure that all clamps and line blocks are installed correctly.
Subtask 71-51-44-865-061-A ** ON A/C NOT FOR ALL NOTE: Refer to the recommended procedure for the installation of the wire harness (Ref. AMM TASK 70-60-00-910-042).
NOTE: To tighten the flip-lock clamps and hinged line blocks, turn the captive screws 1/4 turn clockwise to engage the cam nuts.
(1) Remove the protective covers from the electrical connectors. (2) Put the electrical harness (5) in position on the engine.
(3) Connect the electrical connectors 402VC-A and 406VC-A to the pylon junction box. Tighten the connectors with your hand plus one-eighth turn.
(4) Put the harness (5) into the flip-lock clamp (10) and tighten the captive screws.
(5) Put the clamps (15) and (40) on the harness (5). Make sure that clamps (45) are installed correctly on the other harnesses.
(6) Attach the clamp (40) to clamps (45) with the screw (20), the washers (25) and (35) and the nut (30).
NOTE: Detail A shows the most current harness installation. Detail B illustrates the initial harness installation. Refer to the illustrated parts catalog for applicable harness installation configurations.
(7) Attach clamps (15) together the screw (20), the washer (25) and the nut (30). (8) TORQUE the nuts (30) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
. (9) Attach the harness (5) to the bracket with the screws (20) and the washers (25).
(10) Attach the harness (5) to the bracket with the screws (50), the washers (25) and the clamps (55).
(11) TORQUE the screws (20) and (50) to between 22 and 20 lbf.in (0.25 and 0.23 m.daN )
. (12) Put the harness (5) into the flip-lock clamp (60) and tighten the captive screw.
(13) Put the harness (5) into the rubber insert of the line block (65).
(14) Close the line block (65) and tighten the captive screw.
(15) Put the harness (5) into the rubber insert of the line block (75).
(16) Attach the line block (75) to the bracket with the screws (70) and the washers (25).
(17) TORQUE the screws (70) to between 22 and 20 lbf.in (0.25 and 0.23 m.daN )
. (18) Put the clamp (80) on the harness (5). Attach the clamps (80) to the bracket with screw (20), the washer (25) and the nut (30).
(19) TORQUE the nut (30) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
. (20) Connect electrical connector 4000JH1-A to the upper ignition exiter. Tighten the connector with you hand plus one-eighth turn.
(21) Put the harness (5) into the rubber insert of the line block (95).
(22) Attach the line block (95) to the bracket with the screws (90) and the washers (25) and the nuts (30).
(23) Put the harness (5) into the rubber inserts of the remaining line blocks (65).
(24) Close the line blocks (65) and tighten the captive screws.
(25) Connect the electrical connectors 4000KS-J1 and 4000KS-J3 to the ECU. Tighten the connectors with your hand plus one-eighth turn.
(26) Install the clamps (85) and (115) on the harness (5).
(27) Attach the clamps ((85) and (115) together with the screw (50), the washers (25) and (35) and the nut (30).
(28) Put the harness (5) into the rubber inserts of the line block (110).
(29) Attach the line block (110) to the bracket with the screws (100) and (105) and the washers (25).
(30) Install the clamp (125) on the harness (5). Make sure the other clamps (85) and (130) are installed on the harnesses.
(31) Attach the clamps (85), (125) and (130) together with the screw (120), the washers (25) and (35) and the nut (30).
NOTE: The clamps shown in Detail F was an installation change to prevent chafing. Initial harness installation did not have clamps at this location. Refer to the illustrated parts catalog for applicable harness installation configurations.
(32) TORQUE the nuts (30) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ) . (33) Put the harness (5) into the rubber insert of the line block (140).
(34) Attach the line block (140) to the bracket with the screws (135) and the washers (25).
(35) TORQUE the screws (100) and (135) to between 22 and 20 lbf.in (0.25 and 0.23 m.daN )
. (36) Connect the electrical connector 4004VC-A to the transition box. Tighten the connector with your hand plus one-eighth turn.
(37) Use lacing and tying tape (Material No.CP8003) to hold cables from 4004VC-A, 4000KS-J6 and 4003VC-A connectors together near end of support tube.
(38) Examine the harness installation and make sure that all clamps and line blocks are installed correctly.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 71-51-44-710-052-A ** ON A/C NOT FOR ALL 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| 49VU | ANTI ICE/PROBES/AOA/1 | 4DA1 | D04 |
| 49VU | ANTI ICE/PROBES/PITOT/1 | 3DA1 | D02 |
| 49VU | COM/CVR/SPLY | 2RK | E14 |
| 49VU | COM/CVR/CTL | 4RK | E13 |
| 121VU | RCDR/DFDR | 7TU | K16 |
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| 122VU | ANTI ICE/WINDOWS/R | 4DG2 | W14 |
| 122VU | ANTI ICE/WINDOWS/L | 4DG1 | X14 |
| 122VU | ANTI ICE/PROBES/2/PITOT | 3DA2 | Y14 |
| 122VU | ANTI ICE/PROBES/2/AOA | 4DA2 | Y13 |
| 122VU | ANTI ICE/PROBES/2/STATIC | 5DA2 | Y11 |
| 122VU | ANTI ICE/PROBES/3/PITOT | 3DA3 | Z16 |
| 122VU | ANTI ICE/PROBES/3/AOA | 4DA3 | Z15 |
| 122VU | ANTI ICE/PROBES/3/STATIC | 5DA3 | Z14 |
| 122VU | ANTI ICE/PROBES/1/STATIC | 5DA1 | Z13 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
| FOR FIN: 1000EM1 (ENGINE1) | |||
| 49VU | ENGINE/1/FIRE DET/LOOP A | 7WD1 | A06 |
| 49VU | ENGINE/1/FADEC A/AND EIU 1 | 2KS1 | A04 |
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| 121VU | ENGINE/IGN/ENG1/SYS A BAT | 2JH1 | P39 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B | 2WE1 | Q44 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A | 1WE1 | Q43 |
| 121VU | ENGINE/ENG1/FIRE DET/LOOP B | 8WD1 | Q38 |
| 121VU | ENGINE/ENG1/FADEC B/AND EIU 1 | 4KS1 | R41 |
| 122VU | ELEC/GCU/1 | 2XU1 | T26 |
| FOR FIN: 1000EM2 (ENGINE2) | |||
| 49VU | ENGINE/2/FIRE DET/LOOP B | 8WD2 | A07 |
| 49VU | ENGINE/2/FADEC A/AND EIU 2 | 2KS2 | A05 |
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
| 121VU | ENGINE/IGN/ENG2/SYS A BAT | 2JH2 | P40 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B | 2WE2 | Q42 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A | 1WE2 | Q41 |
| 121VU | ENGINE/ENG2/FADEC B | 4KS2 | Q40 |
| 121VU | ENGINE/ENG2/FIRE DET/LOOP A | 7WD2 | Q39 |
| 122VU | ELEC/GCU/2 | 2XU2 | T27 |
Subtask 71-51-44-410-053-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(5) Remove the access platform(s).
(6) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(5) Remove the access platform(s).
(6) Remove the WARNING NOTICE(S).