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6 If the resistance values are out of the specified limits:
_
- replace the harness CJ12R (Ref. AMM TASK 73-21-50-000-004) and (Ref. AMM TASK 73-21-50-400-004).
R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
A. The failure messages are generated if the channels A and B signals are invalid, out of range, or both channels disagree.
(1) If the failure messages LPTC VLV, J11, ECU and LPTC VLV, J12, ECU are not confirmed:
(a) No maintenance action is required.
(2) If the failure messages LPTC VLV, J11, ECU and LPTC VLV, J12, ECU are not confirmed but are repetitive:
- disconnect the CJ11R and CJ12R harnesses from the LPTC valve (LPT-A and LPT-B connectors) and visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
(a) If damage is found:
- repair or replace as required.
(b) If no damage is found:
- 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:
- replace the harness HJ11 (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) (Ref. AMM TASK 73-21-50-400-026).
(f) If the fault continues during the subsequent flights:
- replace the harness HJ12 (Ref. AMM TASK 73-21-50-000-045) and (Ref. AMM TASK 73-21-50-400-045).
(g) If the fault continues during the subsequent flights:
- replace the harness CJ12R (located in the right core compartment) (Ref. AMM TASK 73-21-50-000-028) (Ref. AMM TASK 73-21-50-400-028).
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E (3) If the failure message LPTC VLV, J11, ECU is confirmed on channel A:
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- disconnect the CJ11R harness (LPT-A) connector (located in the right core compartment) from the LPTC valve and visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
(a) If damage is found:
- repair or replace as required.
(b) If no damage is found:
- do the 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).
(d) If the resistance values are in the specified limits:
- connect the CJ11R harness (LPT-A) connector to the LPTC valve receptacle (located in the right core compartment),
- disconnect the HJ11 harness from the ECU (4000KS) and visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
1_ If damage is found:
- repair or replace as required.
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).
F 『R EEFF : 106-149, 155-199, 208-299, 301-399, E ∞∞75-22-00∞∞∞∞∞∞∞∞∞∞Page 236 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 大气 AIR(33)
