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A. Test
(1) Do the operational test of the FADEC on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
4. Fault Isolation
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A. If the test does not give a maintenance message:
- do an operational test of the ignition system to do an aural check of the spark igniter operation (Ref. AMM TASK 74-00-00-710-043).
(1) If the spark igniter operates correctly:
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(2) If the spark igniter does not operate correctly:
- do a check for open or short to ground of the J1 wiring between the ECU (4000KS) and the upper ignition exciter (Ref. ASM 74-31/01)
- do a check for open or short to ground of the J2 wiring between the ECU (4000KS) and the lower ignition exciter (Ref. ASM 74-31/01).
(a) If the wiring is not correct:
- repair the above wiring.
(b) If the wiring is correct:
- replace the right spark igniter or
- replace the left spark igniter (Ref. AMM TASK 74-21-30-000-002) and (Ref. AMM TASK 74-21-30-400-002).
1_ If the fault continues:
- replace the right ignition lead or
- replace the left ignition lead (Ref. AMM TASK 74-21-10-000-
002) and (Ref. AMM TASK 74-21-10-400-002) or (Ref. AMM TASK
74-21-20-000-002) and (Ref. AMM TASK 74-21-20-400-002).
a If the fault continues:
_
- replace the lower ignition exciter
- replace the upper ignition exciter (Ref. AMM TASK 74-11-10-000-002) and (Ref. AMM TASK 74-11-10-400-002).
b If the fault continues:
_
- make sure that there is no ground signal at the EIU1 (1KS1) pin AA/5B (Ref. ASM 74-31/01).
c If the fault continues:
_
- replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
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- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
B. Do an engine automatic start procedure (Ref. AMM TASK 71-00-00-710-003).
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Failure of the Ignition System on Engine 2
1. Possible Causes
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- EIU-2 (1KS2)
- ECU (4000KS)
- J1 wiring
- J2 wiring
- right spark igniter
- left spark igniter
- right ignition lead
- left ignition lead
- lower ignition exciter
- upper ignition exciter
2. Job Set-up Information
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A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R R AMM AMM AMM AMM 71-00-00-710-003 73-21-60-000-001 73-21-60-400-001 73-25-34-000-040
AMM 73-25-34-400-040
AMM 73-29-00-710-040
AMM AMM AMM 74-00-00-710-043 74-11-10-000-002 74-11-10-400-002
AMM AMM AMM AMM AMM AMM ASM 74-21-10-000-002 74-21-10-400-002 74-21-20-000-002 74-21-20-400-002 74-21-30-000-002 74-21-30-400-002 74-31/01
F EEFF : ALL E E ECES
Engine Automatic Start
Removal of the Electronic Control Unit (ECU)(4000KS)
Installation of the Electronic Control Unit
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本文链接地址：A320 Trouble Shooting Manual 排故手册 STARTING 起动(3)
