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 . pin 21 and the ground (> 10 Megohms).

 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) 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 CJ11R and CJ12L 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) or the 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 VSV actuator (Ref. AMM TASK 75-32-10-000-002) and (Ref. AMM TASK 75-32-10-400-002).
R B. If the test does not give the maintenance messages VSV ACT, J11, ECU and
R VSV ACT, J12, ECU:
R - No maintenance action is required.

R C. Do the test given in Para. 3.A.

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 TASK 75-32-00-810-805
 Loss of the feedback Signal from the VSV through the Channel A on Engine 1
 1. Possible Causes
_______________
 - harness J11

 - ECU (4000KS)

 - harness CJ11R

 - VSV actuator

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
AMM 73-21-50-000-026 Removal of the CJ11R Harness
 AMM 73-21-50-000-044 Removal of the HJ11 Harness
 AMM 73-21-50-400-026 Installation of the CJ11R Harness
 AMM 73-21-50-400-044 Installation of the HJ11 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 1A 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, J11, ECU:
 - do a check for open or short to ground of the harness J11 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 J11 from the ECU (4000KS) and do a resistance check of the cable J11 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 J11 from the cable CJ11R at the 6 o'clock junction box and do a resistance check of the cable CJ11R between: . pins 4 and 14 (400 to 600 Ohms) . pins 1 and 6 (100 to 180 Ohms) . pins 15 and 27 (100 to 180 Ohms) . pins 4 and 5 (> 10 Megohms) . pins 1 and 5 (> 10 Megohms) . pins 15 and 5 (> 10 Megohms) . pin 4 and the ground (> 10 Megohms) . pin 1 and the ground (> 10 Megohms) . pin 15 and the ground (> 10 Megohms).
　
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