F 『 E C F M E E E E 56 E E E (a) If the fault continues during the subsequent flights:
- replace the Hydromechanical Unit (HMU) (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).
(b) If the fault continues during the subsequent flights:
- replace the HJ7 harness (Ref. AMM TASK 73-21-50-000-040) and (Ref. AMM TASK 73-21-50-400-040).
(3) If the failure message J7, HMU(VBV TM), ECU is confirmed:
(a) Disconnect the HJ7 harness from the ECU (4000KS) receptacle.
1 Visually examine the ECU (4000KS) receptacle and the HJ7
_ harness connector for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-001).
a If harness connector or ECU receptacle is damaged:
_ - repair or replace as required.
b If no damage is found:
_
- do an electrical resistance test through the HJ7 harness between: . pins 29 and 30 (17 to 23 ohms) . pins 29 and 13 (> 10 megohms) . pin 29 and the ground (> 10 megohms).
c 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).
d If the resistance values are out of the specified limits:
_
- reconnect the HJ7 harness to the ECU (4000KS).
(b) Disconnect the HJ7 harness from the HMU receptacle (HMU-A) (located in the left core compartment).
1 Visually examine the HJ7 harness connector and the HMU
_ receptacle for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-001).
a If harness connector or HMU receptacle is damaged:
_ - repair or replace as required.
b If no damage is found:
_
- do an electrical resistance test through the HMU receptacle between: . pins 27 and 28 (17 to 23 ohms) . pins 27 and 12 (> 10 megohms) . pin 27 and the ground (> 10 megohms).
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ECES F 『 E C F M E E E E 56 E E E c If the resistance values are out of the specified limits:
_
- replace the HMU (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).
d If the resistance values are in the specified limits:
_
- replace the HJ7 harness (Ref. AMM TASK 73-21-50-000-040) and (Ref. AMM TASK 73-21-50-400-040).
(4) If the failure message J8, HMU(VBV TM), ECU is confirmed:
(a) Disconnect the HJ8 harness from the ECU (4000KS) receptacle.
1 Visually examine the ECU (4000KS) receptacle and the HJ8
_ harness connector for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-001).
a If harness connector or ECU receptacle is damaged:
_ - repair or replace as required.
b If no damage is found:
_
- do an electrical resistance test through the HJ8 harness between: . pins 29 and 30 (17 to 23 ohms) . pins 29 and 13 (> 10 megohms) . pin 29 and the ground (> 10 megohms).
c 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).
d If the resistance values are out of the specified limits:
_
- reconnect the HJ8 harness to the ECU (4000KS).
(b) Disconnect the HJ8 harness from the HMU receptacle (HMU-B) (located in the left core compartment).
1 Visually examine the HJ8 harness connector and the HMU
_ receptacle for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-001).
a If harness connector or HMU receptacle is damaged:
_ - repair or replace as required.
b If no damage is found:
_
- do an electrical resistance test through the HMU receptacle between: . pins 27 and 28 (17 to 23 ohms) . pins 27 and 12 (> 10 megohms) . pin 27 and the ground (> 10 megohms).
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ECES
F 『
E C F M E
E E
E 56 E E E c If the resistance values are out of the specified limits:
_
- replace the HMU (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).
d If the resistance values are in the specified limits:
_
- replace the HJ8 harness (Ref. AMM TASK 73-21-50-000-041) and (Ref. AMM TASK 73-21-50-400-041).
(5) If the failure messages J7, HMU(VBV TM), ECU + J8, HMU(VBV TM), ECU are confirmed on both channel A and channel B:
- replace the ECU right away for dual channel fault (Ref. AMM TASK 73-21-60-000-001) (Ref. AMM TASK 73-21-60-400-001).
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本文链接地址：A320 Trouble Shooting Manual 排故手册 发动机燃油和控制 2(118)
