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 (b) If ECAM Warning ENG1 FUEL CTL FAULT was not displayed:
 - No further action is required.
 (2) If the test does not give the maintenance messages J7, HMU(FMV TM), ECU and J8, HMU(FMV TM), ECU but are repetitive:
 (a) Replace the ECU (4000KS), (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001), if not previously replaced.
 1 Visually examine the J7 and J8 harnesses connectors for
_ damaged pins, contamination (Ref. AMM TASK 73-21-50-210-002):
 a If damage on a connector is found:
_ - replace or repair as required.
 b If nothing is found, continue the troubleshooting.
_
 (b) replace the Hydromechanical Unit (HMU), (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).
 1 Visually examine the HMU receptacle for damaged pins,
_ contamination and fuel wetting (Ref. AMM TASK 73-21-50-210-002):
 a If damage on a connector is found:
_ - replace or repair as required.
 b If fuel wetting is found:
_
 - replace the defective harness J7, (Ref. AMM TASK 73-21-50-000-040) and (Ref. AMM TASK 73-21-50-400-040) or the defective harness J8, (Ref. AMM TASK 73-21-50-000-041) and (Ref. AMM TASK 73-21-50-400-041).
 c If nothing is found, continue the troubleshooting.
_
 (c) Replace the harness J7, (Ref. AMM TASK 73-21-50-000-040) and (Ref. AMM TASK 73-21-50-400-040).

 (d) Replace the harness J8, (Ref. AMM TASK 73-21-50-000-041) and (Ref. AMM TASK 73-21-50-400-041).

 (3) If the test gives only the maintenance message J7, HMU(FMV TM), ECU (only on channel A).
 - Disconnect the J7 harness from the ECU (4000KS) receptacle and visually examine it and the J7 harness connector for damaged pins, contamination (Ref. AMM TASK 73-21-50-210-002).
 (a) If damage on a connector is found:
 - Replace or repair as required.
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 (b) If nothing is found:

 - Do an electrical resistance test through the J7 harness between: . pins 27 and 28 (17 to 23 Ohms) . pins 27 and 12 (> 10 Megohms) . pin 27 and the ground (> 10 Megohms).
 1 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).
 2 If the resistance values are out of the specified limits:
_
 - Reconnect the J7 harness to the ECU (4000KS) receptacle, and continue the troubleshooting.
 (c) Disconnect the J7 harness from the HMU receptacle (located left hand core compartment), and visually examine the J7 harness connector and the HMU receptacle for damaged pins, contamination and fuel wetting (Ref. AMM TASK 73-21-50-210-002).
 1 If damage on a connector is found:
_ - Replace or repair as required.
 2 If fuel wetting is found:
_
 - replace the harness J7, (Ref. AMM TASK 73-21-50-000-040) and (Ref. AMM TASK 73-21-50-400-040).
 3 If nothing is found:
_
 - Do an electrical resistance test on 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).
 a If the resistance values are out the specified limits:
_
 - 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 resistance values are in the specified limits:
_
 - replace the harness J7, (Ref. AMM TASK 73-21-50-000-040) and (Ref. AMM TASK 73-21-50-400-040).
 (4) If the test gives only the maintenance message J8, HMU(FMV TM), ECU (only on channel B)
 - Disconnect the J8 harness from the ECU (4000KS) receptacle and visually examine it and the J8 harness connector for damaged pins, contamination (Ref. AMM TASK 73-21-50-210-002).
 (a) If damage on a connector is found:
 - Replace or repair as required.
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 (b) If nothing is found:

 - Do an electrical resistance test through the J8 harness between: . pins 27 and 28 (17 to 23 Ohms) . pins 27 and 12 (> 10 Megohms) . pin 27 and the ground (> 10 Megohms).
 1 If the resistance values are in the specified limits:
　
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 發(fā)動(dòng)機(jī)燃油和控制 2(113)