A. Do the operational test of the FADEC 1B 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 gives the maintenance message SAV (SW), J9/J10, ECU or SAV (SW), J9/J10, ECU*:
- do a check for open or short to ground of the harnesses J9 and J10 between the ECU (4000KS) and the stater shutoff valve (Ref. ASM 74-31/01).
(1) If the wiring is not correct:
- repair the above wiring.
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E E 56 E E E (2) If the wiring is correct:
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- disconnect the harnesses J9 and J10 from the starter shutoff valve
- install a jumper wire between the pins 3 and 4 on the harnesses J9 and J10
- disconnect the harnesses J9 and J10 from the ECU (4000KS) and do a resistance check of each cable between: . pins 9 and 10 (< 5 Ohms) . pins 9 and 3 (> 10 Megohms) . pin 9 and the ground (> 10 Megohms).
(a) If the resistance values are in the specified limits:
- replace the starter shutoff valve (Ref. AMM TASK 80-11-20-000-003) and (Ref. AMM TASK 80-11-20-400-003).
(b) If the resistance values are out of the specified limits:
- replace the defective harness J9 (Ref. AMM TASK 73-21-50-000-042) and (Ref. AMM TASK 73-21-50-400-042) or
- replace the defective harness J10 (Ref. AMM TASK 73-21-50-000-043) and (Ref. AMM TASK 73-21-50-400-043).
(3) If the fault continues:
- 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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TASK 80-11-00-810-812
Failure of the Starter Shutoff Valve on Engine 2
1. Possible Causes
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- starter shutoff valve
- harness J9
- harness J10
- ECU (4000KS)
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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AMM 73-21-50-000-042 Removal of the HJ9 Harness
AMM 73-21-50-000-043 Removal of the HJ10 Harness
AMM 73-21-50-400-042 Installation of the HJ9 Harness
AMM 73-21-50-400-043 Installation of the HJ10 Harness
R AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit
R (ECU)(4000KS) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine non Motoring) AMM 80-11-20-000-003 Removal of the Starter Shutoff Valve AMM 80-11-20-400-003 Installation of the Starter Shutoff Valve ASM 74-31/01
3. Fault Confirmation
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A. Do the operational test of the FADEC 2B 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 SAV (SW), J9/J10, ECU or SAV (SW), J9/J10, ECU*:
- do a check for open or short to ground of the harnesses J9 and J10 between the ECU (4000KS) and the starter shutoff valve (Ref. ASM 74-31/01).
(1) If the wiring is not correct:
- repair the above wiring.
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E E 56 E E E (2) If the wiring is correct:
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- disconnect the harnesses J9 and J10 from the starter shutoff valve
- install a jumper wire between the pins 3 and 4 on the harnesses J9 and J10
- disconnect the harnesses J9 and J10 from the ECU (4000KS) and do a resistance check of each cable between: . pins 9 and 10 (< 5 Ohms) . pins 9 and 3 (> 10 Megohms) . pin 9 and the ground (> 10 Megohms).
(a) If the resistance values are in the specified limits:
- replace the starter shutoff valve (Ref. AMM TASK 80-11-20-000-003) and (Ref. AMM TASK 80-11-20-400-003). 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 STARTING 起动(19)
