- make sure that the pins are not bent and that the pins and sockets have not moved into the J3 ECU 2 connector (Ref. ASM 73-25/12).
(2) If the fault continues:
- do a check for open circuit in the harness J3 between the pins J3/6, 31 (Ref. ASM 73-25/12).
(a) If the fault continues:
- replace the 5CA1
- replace the 5CA2
- replace the harness J3.
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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 the test given in Para. 3.A.
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FUEL FLOW INDICATING - FAULT ISOLATION PROCEDURES
_________________________________________________
TASK 73-31-00-810-805
Failure of the Fuel Flow Transmitter on Engine 1
1. Possible Causes
_______________
- harness J13
- ECU (4000KS)
- fuel flow transmitter
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-21-50-000-046 Removal of the HJ13 Harness AMM 73-21-50-400-046 Installation of the HJ13 Harness AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS)
without PMUX
AMM 73-21-60-400-001 Installation of the Electronic Control Unit
(ECU)(4000KS) without PMUX
AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with
Engine non Motoring)
AMM 73-31-10-000-002 Removal of the Fuel Flow Transmitter
AMM 73-31-10-400-002 Installation of the Fuel Flow Transmitter
ASM 73-25/17
3. Fault Confirmation
__________________
A. Do the operational test of the FADEC 1A on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
4. Fault Isolation
_______________
A. If the test gives the maintenance message FLOW SNSR, J13, ECU:
- do a check for open or short to ground at pins J13/1, 2, 3, 6 of the harness J13 between the ECU (4000KS) and the fuel flow transmitter (Ref. ASM 73-25/17).
(1) If the wiring is not correct:
- repair the above wiring.
(2) If the wiring is correct:
- disconnect the harness J13 from the ECU (4000KS) and do a check of the ECU resistance cable between: . pins 2 and 3 (250 to 350 Ohms) . pins 3 and 6 (250 to 350 Ohms)
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. pin 2 and ground (> 10 Megohms).
(a) 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).
(b) If the resistance values are out of the specified limits:
- disconnect the harness J13 from the fuel flow transmitter and do a check of the transmitter resistance between: . pins 1 and 2 (250 to 350 Ohms) . pins 2 and 3 (250 to 350 Ohms) . pins 1 and 4 (> 10 Megohms) . pin 1 and ground (> 10 Megohms).
1 If the resistance values are in the specified limits
_
- replace the harness J13 (Ref. AMM TASK 73-21-50-000-046) and (Ref. AMM TASK 73-21-50-400-046).
2 If the resistance values are out of the specified limits:
_
- replace the fuel flow transmitter (Ref. AMM TASK 73-31-10-000-002) and (Ref. AMM TASK 73-31-10-400-002).
B. Do the test given in Para. 3.A.
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 發動機燃油和控制 2(151)
