- repair or replace as required.

 (b) If no damage is found:

 - replace the VBV sensor (RVDT) (Ref. AMM TASK 75-31-70-000-002) and (Ref. AMM TASK 75-31-70-400-002).
 NOTE : After new VBV sensor is installed, a rigging of the VBV
____ R system is required (Ref. AMM TASK 75-31-00-200-002).
 (c) If the fault continues during the subsequent flights:
 - disconnect the HJ12 harness from the ECU (4000KS) and visually examine the receptacle and the connector for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-001).
 1 If damage is found:
_ - repair or replace as required.
 2 If no damage is found:
_
 - 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 HJ12 (ECU to the 6 o'clock junction box) (Ref. AMM TASK 73-21-50-000-045) and (Ref. AMM TASK 73-21-50-400-045).

 (e) If the fault continues during the subsequent flights:

 - replace the harness CJ12L (located in the left core compartment) (Ref. AMM TASK 73-21-50-000-027) and (Ref. AMM TASK 73-21-50-400-027).
 (3) If the failure message VBV SENS, J12, ECU is confirmed:
 - disconnect the CJ12L harness from the VBV sensor (VBV-B connector) located in the left core compartment and visually examine the CJ12L harness connector and the VBV sensor (RVDT) receptacle for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-001).
 (a) If damage 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 CJ12L (VBV-B connector) to the VBV sensor (RVDT),

 - disconnect the harness HJ12 from the ECU (4000KS) receptacle

 and visually examine the HJ12 harness connector and the VBV R sensor (RVDT) receptacle for damaged pins and contamination R (Ref. AMM TASK 73-21-50-210-001).
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 HJ12 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 HJ12 harness (located at the 6 o'clock junction box) from the CJ12L and do an electrical resistance test through the CJ12L 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 CJ12L harness (Ref. AMM TASK 73-21-50-000-027) and (Ref. AMM TASK 73-21-50-400-027).
 (j) If the resistance test values are in the specified limits:
 - replace the HJ12 harness (Ref. AMM TASK 73-21-50-000-045) and (Ref. AMM TASK 73-21-50-400-045).
 B. Do the test given in Para. 3.A.
　
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