2 If no damage is found:
_
- do an electrical resistance test through the alternator stator connector between: . pins 2 and 5 (<1 Ohm) . pins 3 and 5 (<1 Ohm) . pins 4 and 5 (<1 Ohm) . pin 5 and the ground (>10 Megohms).
a If the resistance values are out of the specified limits:
_
- replace the alternator stator (Ref. AMM TASK 73-21-30-000-001) and (Ref. AMM TASK 73-21-30-400-001).
b If the resistance values are in the specified limits:
_ - reconnect the HJ9 harness to the alternator stator.
(b) Disconnect the HJ9 harness from the ECU (4000KS) receptacle.
(c) Visually examine the ECU (4000KS) receptacle and the HJ9 harness connector for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
1 If harness connector or ECU receptacle is damaged:
_ - repair or replace as required.
2 If no damage is found:
_
- do an electrical resistance test through the HJ9 harness between: . pins 5 and 13 (<1 ohm) . pins 5 and 14 (<1 ohm) . pins 5 and 15 (<1 ohm) . pins 5 and 4 (>10 megohms) . pins 13 and 4 (>10 megohms) . pins 14 and 4 (>10 megohms) . pins 15 and 4 (>10 megohms) . pin 5 and the ground (>10 megohms).
a If the resistance values are out of the specified limits:
_
- replace the HJ9 harness (Ref. AMM TASK 73-21-50-000-042) and (Ref. AMM TASK 73-21-50-400-042).
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b If the resistance values are in the specified limits:
_
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
**ON A/C ALL
B. Do the test given in Para. 3.A.
(1) No additional maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.
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TASK 77-10-00-810-838
Loss of the Alternator Power Supply on Engine 2 - Channel A
1. Possible Causes
_______________
- ECU (4000KS)
- alternator stator
- HJ9 harness
- alternator rotor
- AGB
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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AMM 72-63-00-000-003 Removal of the Accessory Gearbox Assembly AMM 72-63-00-400-003 Installation of the Accessory Gearbox Assembly AMM 73-21-30-000-001 Removal of the Control Alternator AMM 73-21-30-400-001 Installation of the Control Alternator AMM 73-21-50-000-042 Removal of the HJ9 Harness AMM 73-21-50-210-002 Visual Inspection of the Wiring Harnesses AMM 73-21-50-400-042 Installation of the HJ9 Harness AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with
Engine Motoring) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine Non motoring) AMM 79-21-10-210-002 Check of the Lubrication Unit Magnetic Plugs and Screens
3. Fault Confirmation
__________________
**ON A/C 001-049, 056-056, 058-058, 061-099, 101-105, 151-199, 201-211,
A. Do the operational test of the FADEC 2A on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
R **ON A/C 051-055, 057-057, 059-060, 106-149, 212-299, 301-399, 401-499,
A. Do the operational test of the FADEC 2A on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
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**ON A/C ALL
4. Fault Isolation
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本文链接地址：A320 Trouble Shooting Manual 排故手册 发动机指示(148)
