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 1 If the resistance values are in the specified limits:
_
 - replace the harness J11 (Ref. AMM TASK 73-21-50-000-044) and (Ref. AMM TASK 73-21-50-400-044).
 2 If the resistance values are out of the specified limits:
_
 - disconnect the cable CJ11R from the VSV actuator and do a resistance check of the VSV actuator between: . pins 2 and 3 (400 to 600 Ohms) . pins 4 and 5 (100 to 180 Ohms) . pins 6 and 7 (100 to 180 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 harness CJ11R (Ref. AMM TASK 73-21-50-000-026) and (Ref. AMM TASK 73-21-50-400-026).
 b If the resistance values are out of the specified limits:
_
 - replace the VSV actuator (Ref. AMM TASK 75-32-10-000-002) and (Ref. AMM TASK 75-32-10-400-002).
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R  B. If the test does not give the maintenance message VSV ACT, J11, ECU: 
R  - No maintenance action is required. 
R  C. Do the test given in Para. 3.A.

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 TASK 75-32-00-810-807
 Loss of the feedback Signal from the VSV through the Channel B on Engine 1
 1. Possible Causes
_______________
 - harness J12

 - ECU (4000KS)

 - harness CJ12L

 - VSV actuator

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
AMM 73-21-50-000-027 Removal of the CJ12L Harness
 AMM 73-21-50-000-045 Removal of the HJ12 Harness
 AMM 73-21-50-400-027 Installation of the CJ12L Harness
 AMM 73-21-50-400-045 Installation of the HJ12 Harness

R  AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit
R (ECU)(4000KS) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine non Motoring) AMM 75-32-10-000-002 Removal of the Variable Stator Vane (VSV) Actuators AMM 75-32-10-400-002 Installation of the Variable Stator Vane (VSV) Actuators ASM 73-25/18
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the FADEC 1B on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message VSV ACT, J12, ECU:
 - do a check for open or short to ground of the harness J12 between the ECU (4000KS) and the 6 o'clock junction box, between the 6 o'clock junction box and the VSV LVDT (Ref. ASM 73-25/18).
 (1) If the wiring is not correct:
 - repair the above wiring.
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 (2) If the wiring is correct:
 - disconnect the cable J12 from the ECU (4000KS) and do a resistance check of the cable J12 between: . pins 12 and 28 (400 to 600 Ohms) . pins 26 and 27 (100 to 180 Ohms) . pins 10 and 25 (100 to 180 Ohms) . pins 12 and 11 (> 10 Megohms) . pins 26 and 11 (> 10 Megohms) . pins 10 and 11 (> 10 Megohms) . pin 12 and the ground (> 10 Megohms) . pin 26 and the ground (> 10 Megohms) . pin 10 and the ground (> 10 Megohms).
 (a) 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).

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

 - disconnect the cable J12 from the cable CJ12L at the 6 o'clock junction box and do a resistance check of the cable CJ12L between: . pins 24 and 11 (400 to 600 Ohms) . pins 23 and 22 (100 to 180 Ohms) . pins 21 and 9 (100 to 180 Ohms) . pins 24 and 10 (> 10 Megohms) . pins 23 and 10 (> 10 Megohms) . pins 21 and 10 (> 10 Megohms) . pin 24 and the ground (> 10 Megohms) . pin 23 and the ground (> 10 Megohms) . pin 21 and the ground (> 10 Megohms).
　
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