- replace the LPTC valve (Ref. AMM TASK 75-22-10-000-002) and (Ref. AMM TASK 75-22-10-400-002).
(c) If the fault continues during the subsequent flights:
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(d) If the fault continues during the subsequent flights: R - replace the harness HJ11 (ECU to the 6 o'clock junction box) R (Ref. AMM TASK 73-21-50-000-044) and (Ref. AMM TASK 73-21-50-
400-044).
(e) If the fault continues during the subsequent flights:
- replace the harness CJ11R (located in the right core compartment) (Ref. AMM TASK 73-21-50-000-026) and (Ref. AMM TASK 73-21-50-400-026).
(3) If the failure message LPTC VLV, J11, ECU is confirmed: R - disconnect the CJ11R harness (LPT-A) connector (located in the R right core compartment) from the LPTC valve and visually examine R the CJ11R wire harness connector receptacles and the LPTC valve R connectors for damaged pins or contamination (Ref. AMM TASK 73-21-
50-210-002).
R (a) If damage is found:
R - repair or replace as required.
R (b) If no damage is found:
- do an electrical resistance test through the LPTC valve between: . pins 2 and 3 (80 to 109.5 ohms) . pins 4 and 5 (85 to 115 ohms) . pins 6 and 7 (85 to 115 ohms) . pin 2 and the ground (> 10 megohms) . pin 4 and the ground (> 10 megohms) . pin 6 and the ground (> 10 megohms).
(c) If the resistance values are out of the specified limits:
- replace the LPTC valve (Ref. AMM TASK 75-22-10-000-002) and (Ref. AMM TASK 75-22-10-400-002).
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(d) If the resistance values are in the specified limits: R - reconnect the CJ11R harness (LPT-A) connector to the LPTC R valve, R - disconnect the HJ11 harness (channel A) from the ECU (4000KS) R and visually examine the receptacle for damaged pins or R contamination (Ref. AMM TASK 73-21-50-210-002).
R 1_ If damage is found:
R - repair or replace as required.
R 2_If no damage is found:
- do an electrical resistance test through the HJ11 harness between: . pins 4 and 5 (80 to 109.5 ohms) . pins 6 and 7 (85 to 115 ohms) . pins 2 and 3 (85 to 115 ohms) . pins 4 and 1 (> 10 megohms) . pins 6 and 1 (> 10 megohms) . pins 2 and 1 (> 10 megohms) . pin 4 and the ground (> 10 megohms) . pin 6 and the ground (> 10 megohms) . pin 2 and the ground (> 10 megohms).
3 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).
4 If the resistance values are out of the specified limits:
_ R - disconnect the HJ11 harness from the CJ11R harness located R at the 6 o'clock junction box and do an electrical R resistance test through the CJ11R harness between:
. pins 20 and 21 (80 to 109.5 ohms) . pins 7 and 19 (85 to 115 ohms) . pins 2 and 9 (85 to 115 ohms) . pins 20 and 8 (> 10 megohms) . pins 7 and 8 (> 10 megohms) . pins 2 and 8 (> 10 megohms) . pin 20 and the ground (> 10 megohms) . pin 7 and the ground (> 10 megohms) . pin 2 and the ground (> 10 megohms).
5 If the resistance values are in the specified limits:
_
- replace the harness HJ11 (ECU to the 6 o'clock junction box) (Ref. AMM TASK 73-21-50-000-044) and (Ref. AMM TASK 73-21-50-400-044).
6 If the resistance values are out of the specified limits:
_
- replace the harness CJ11R (Ref. AMM TASK 73-21-50-000-026) and (Ref. AMM TASK 73-21-50-400-026).
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R B. Do the test given in Para. 3.A.
R (1) No additional maintenance action is required if the fault is not
R confirmed.
R (2) Repeat the fault isolation procedure if the fault continues.
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TASK 75-22-00-810-802
Loss of the Feedback Signal from the LPTC Valve - Engine 2 - Channel A
1. Possible Causes
_______________
- LPTC valve
- ECU (4000KS)
- harness HJ11 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 大氣 AIR(19)
