(b) If the resistance values are out of the specified limits:

 - disconnect the cables J11 and J12 from the cables CJ11L and CJ12L at the 6 o'clock junction box and do a resistance check of the cables CJ11L and CJ12L between: for cable CJ11L . pins 5 and 6 (80 to 110 Ohms) . pins 2 and 7 (80 to 120 Ohms) . pins 3 and 4 (80 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). for cable CJ12L . pins 17 and 6 (80 to 110 Ohms) . pins 18 and 19 (80 to 120 Ohms) . pins 8 and 20 (80 to 120 Ohms) . pins 17 and 7 (> 10 Megohms) . pins 18 and 7 (> 10 Megohms)
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 F 『 E C F M E E E E 56 E E E . pins 8 and 7 (> 10 Megohms)

 . pin 17 and the ground (> 10 Megohms)
 . pin 18 and the ground (> 10 Megohms)
 . pin 8 and the ground (> 10 Megohms).
 1 If the resistance values are in the specified limits:
_
 - replace the defective harness J11 (Ref. AMM TASK 73-21-50-000-044) and (Ref. AMM TASK 73-21-50-400-044) or harness J12 (Ref. AMM TASK 73-21-50-000-045) and (Ref. AMM TASK 73-21-50-400-045).
 2 If the resistance values are out of the specified limits:
_
 - disconnect the cables CJ11L and CJ12L from the VBV sensor and do a resistance check of the VBV sensor between: . pins 2 and 3 (80 to 110 Ohms) . pins 4 and 5 (80 to 120 Ohms) . pins 6 and 7 (80 to 120 Ohms) . pin 2 and the ground (> 10 Megohms) . pin 4 and the ground (> 10 Megohms) . pin 6 and the ground (> 10 Megohms).
 a If the resistance values are in the specified limits:
_
 - replace the defective harness CJ11L (Ref. AMM TASK 73-21-50-000-025) and (Ref. AMM TASK 73-21-50-400-025) or harness CJ12L (Ref. AMM TASK 73-21-50-000-027) and (Ref. AMM TASK 73-21-50-400-027).
 b If the resistance values are out of the specified limits:
_
 - replace the VBV sensor (RVDT) (Ref. AMM TASK 75-31-70-000-002) and (Ref. AMM TASK 75-31-70-400-002).
 B. Do the test given in Para. 3.A.
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 Loss of the feedback Signal from the VBV through the two Channels on Engine 2
 1. Possible Causes
_______________
 - VBV sensor (RVDT)

 - ECU (4000KS)

 - harness J11

 - harness J12

 - harness CJ11L

 - harness CJ12L

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM  73-21-50-000-025 
AMM  73-21-50-000-027 
AMM  73-21-50-000-044 
AMM  73-21-50-000-045 
AMM  73-21-50-400-025 
AMM  73-21-50-400-027 
AMM  73-21-50-400-044 
AMM  73-21-50-400-045 
AMM  73-21-60-000-001 
AMM  73-21-60-400-001 
AMM  73-29-00-710-040 
AMM  75-31-70-000-001 
AMM  75-31-70-000-002 
AMM  75-31-70-400-001 
AMM  75-31-70-400-002 
ASM  73-25/18
 ASM  73-25/18
 ASM  73-25/18

 3. Fault Confirmation
__________________
Removal of the CJ11L HarnessRemoval of the CJ12L HarnessRemoval of the HJ11 HarnessRemoval of the HJ12 HarnessInstallation of the CJ11L HarnessInstallation of the CJ12L HarnessInstallation of the HJ11 HarnessInstallation of the HJ12 HarnessRemoval of the Electronic Control Unit (ECU)(4000KS)Installation of the Electronic Control Unit (ECU)(4000KS)Operational Test of the FADEC on the ground (with Engine Motoring)Removal of the Variable Bleed Valve Position SensorRemoval of the Variable Bleed Valve position SensorInstallation of the Variable Bleed Valve Position SensorInstallation of the Variable Bleed Valve position Sensor
 A. Do the operational test of the FADEC 2A and 2B on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
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