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 A. Test
 (1) Do the operational test of the FADEC 2A and 2B on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation_______________
 A. If the test gives the maintenance messages J7,HMU (BSVSOL), ECU + J8, HMU (BSVSOL), ECU:
 - do a check for open or short to ground at pins J7/6, 7, 39 and J8/6, 7, 39 of the harnesses J7 and J8 between the ECU (4000KS) and the BSV solenoid in the HMU, (Ref. ASM 73-25/18).
 (1) If one of these wirings is not correct:
 - repair the defective harness J7 or J8.
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 - disconnect the harnesses J7 and J8 from the ECU and do a check of the ECU cable resistance between: . pins 6 and 7 (26 to 36 Ohms) . pins 6 and 39 (> 10 Megohms) . pin 6 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 harnesses J7 and J8 from the HMU and do a check of the HMU receptacle resistance between: . pins 6 and 7 (26 to 36 Ohms) . pins 6 and 39 (> 10 Megohms) . pin 6 and the ground (> 10 Megohms).
 1 If the resistance values are in the specified limits:
_
 - replace the defective harness J7, (Ref. AMM TASK 73-21-50-000-040) and (Ref. AMM TASK 73-21-50-400-040) or the defective harness J8, (Ref. AMM TASK 73-21-50-000-041) and (Ref. AMM TASK 73-21-50-400-041).
 2 If the resistance values are out of the specified limits:
_
 - replace the Hydromechanical Unit (HMU), (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).
 B. Do the test given in Para. 3.A.(1).
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 Loss of the Feedback Signal from the FMV Resolver through the Two Channels on Engine 1
 1. Possible Causes
_______________
 - Hydromechanical Unit (HMU)

 - harness J7

 - harness J8

 - ECU (4000KS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-21-10-000-002 Removal of the Hydromechanical Unit (HMU) AMM 73-21-10-400-002 Installation of the Hydromechanical Unit (HMU) AMM 73-21-50-000-040 Removal of the HJ7 Harness AMM 73-21-50-000-041 Removal of the HJ8 Harness AMM 73-21-50-210-002 Visual Inspection of the Wiring Harnesses AMM 73-21-50-400-040 Installation of the HJ7 Harness AMM 73-21-50-400-041 Installation of the HJ8 Harness 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
 (ECU)(4000KS) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine non Motoring)
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the FADEC 1A and 1B on the ground (with engine non - motoring) (Ref. AMM TASK 73-29-00-710-040).
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 4. Fault Isolation
_______________
 A. Do this procedure:
 NOTE : This fault is generated if one or both FMV resolver signals are
____
 out of range, invalid or the signals disagree.

 (1) If the test does not give the maintenance messages J7, HMU (FMVRES), ECU + J8, HMU (FMVRES), ECU:

 - replace the Hydromechanical Unit (HMU), (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).

 - Visually examine the HMU receptacle and the J7 and J8 harness connectors for damaged pins, contamination and fuel wetting (Ref. AMM TASK 73-21-50-210-002).

 (a) If damage on a connector is found:

 - replace or repair as required.

 (b) If fuel wetting is found:
　
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