- replace the harness HJ11 (ECU to the junction box 6 o'clock) (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 CJ11L (located on the left core compartment) (Ref. AMM TASK 73-21-50-000-025) and (Ref. AMM TASK 73-21-50-400-025).
(3) If the failure message VBV SNSR, J11, ECU is confirmed:
- disconnect the CJ11L harness from the VBV sensor (VBV-A connector) located in the left core compartment and visually examine the CJ11L harness connector and the VBV sensor (RVDT) receptacle for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-002).
(a) If dammge is found:
- repair or replace as required.
(b) If no damage is found:
- do an electrical resistance test through the VBV sensor between: . pins 2 and 3 (80 to 110 ohms)
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. pins 4 and 5 (80 to 120 ohms)
. pins 6 and 7 (85 to 120 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 test values are out of the specified limits:
- replace the VBV sensor (Ref. AMM TASK 75-31-70-000-002) and (Ref. AMM TASK 75-31-70-400-002).
(d) If the resistance test values are in the specified limits:
- reconnect the harness CJ11L (VBV-A connector) to the VBV sensor (RVDT),
- disconnect the harness HJ11 from the ECU (4000KS) receptacle
and visually examine the HJ11 harness connector and the VBV R sensor (RVDT) receptacle for damaged pins and contamination R (Ref. AMM TASK 73-21-50-210-002).
R (e) If damage is found:
- repair or replace as required.
R (f) If no damage is found:
- do an electrical resistance test through the J11 harness between: . pins 13 and 29 (80 to 110 ohms) . pins 30 and 31 (80 to 120 ohms) . pins 15 and 32 (85 to 120 ohms) . pins 13 and 14 (> 10 megohms) . pins 30 and 14 (> 10 megohms) . pins 15 and 14 (> 10 megohms) . pin 13 and the ground (> 10 megohms) . pin 30 and the ground (> 10 megohms) . pin 15 and the ground (> 10 megohms).
(g) If the resistance test 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).
(h) If the resistance test values are out of the specified limits:
- disconnect the HJ11 harness (located at the 6 o'clock junction box) from the CJ11L and do an electrical resistance test through the CJ11L harness between: . pins 5 and 6 (80 to 110 ohms) . pins 2 and 7 (80 to 120 ohms) . pins 3 and 4 (85 to 120 ohms) . pins 5 and 1 (> 10 megohms) . pins 2 and 1 (> 10 megohms) . pins 3 and 1 (> 10 megohms) . pin 5 and the ground (> 10 megohms) . pin 2 and the ground (> 10 megohms) . pin 3 and the ground (> 10 megohms).
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- replace the CJ11L harness (Ref. AMM TASK 73-21-50-000-025) and (Ref. AMM TASK 73-21-50-400-025).
(j) If the resistance test values are in the specified limits:
- replace the HJ11 harness (Ref. AMM TASK 73-21-50-000-044) and (Ref. AMM TASK 73-21-50-400-044).
B. Do the test given in Para. 3.A.
(1) No additional maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.
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TASK 75-30-00-810-815
Loss of the VBV Feedback Signal - Engine 1 - Channel B
1. Possible Causes
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- VBV sensor (RVDT)
- ECU (4000KS)
- harness HJ12
- harness CJ12L
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(60)
