R  (4) If the fault continues: 
R  - replace the harness J8 (Ref. AMM TASK 73-21-50-000-041) and (Ref. 
R  AMM TASK 73-21-50-400-041). 
R  (5) If the fault continues: 
R  - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. 
R  AMM TASK 73-21-60-400-001). 
R 
R  B. Test 
R  (1) Disconnect the connector C132 from the HJ13 harness at the oil 
R  temperature sensor to force the opening of the fuel return valve. 
R  (Ref. Fig. 201/TASK 73-10-00-991-001) 
R  (2) Do a wet motoring test of the engine and check that the fault does 
R  not duplicate. Disregard the ECAM status linked to the disconnection 
R  of the oil temperature sensor during the test. 
R  (3) Reconnect the HJ13 harness to the oil temperature sensor. 
R

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 TASK 73-10-00-810-820
 Failure of the FRV of the Engine 2 in the Closed Position, on Channel B
 1. Possible Causes
_______________
R
 - harness J8 R - fuel return valve R - ECU (4000KS)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM AMM AMM AMM AMM AMM  73-11-50-000-002 73-11-50-400-002 73-21-50-000-041 73-21-50-400-041 73-21-60-000-001 73-21-60-400-001 
R R  ASM 78-25/18 73-10-00-991-001 
3. Fault Confirmation__________________ 
R R A. Not applicable. 
4. Fault Isolation_______________ 

Removal of the Fuel Return Valve (FRV)Installation of the Fuel Return ValveRemoval of the HJ8 HarnessInstallation of the HJ8 HarnessRemoval of the Electronic Control Unit (ECU)(4000KS)Installation of the Electronic Control Unit (ECU)(4000KS)
Fig. 201
R A. The fault is generated when the fuel return valve fails to reach the
R opened position when commanded by the ECU.

R (1) Inspect the J8 harness and associated connectors for sign of damage
R or contamination (Ref. ASM 78-25/18).

R (2) If damage is found:
R - replace the harness J8 (Ref. AMM TASK 73-21-50-000-041) and (Ref.
R AMM TASK 73-21-50-400-041).

R (3) If nothing is found:
R - replace the fuel return valve (Ref. AMM TASK 73-11-50-000-002) and
R (Ref. AMM TASK 73-11-50-400-002).

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R  (4) If the fault continues: 
R  - replace the harness J8 (Ref. AMM TASK 73-21-50-000-041) and (Ref. 
R  AMM TASK 73-21-50-400-041). 
R  (5) If the fault continues: 
R  - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. 
R  AMM TASK 73-21-60-400-001). 
R 
R  B. Test 
R  (1) Disconnect the connector C132 from the HJ13 harness at the oil 
R  temperature sensor to force the opening of the fuel return valve. 
R  (Ref. Fig. 201/TASK 73-10-00-991-001) 
R  (2) Do a wet motoring test of the engine and check that the fault does 
R  not duplicate. Disregard the ECAM status linked to the disconnection 
R  of the oil temperature sensor during the test. 
R  (3) Reconnect the HJ13 harness to the oil temperature sensor. 
R

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 1. Possible Causes
 Failure of the Feedback of the Fuel Return Valve on Engine 1 _______________
 - ECU (4000KS)

 - fuel return valve

 - harness J7

 - harness J8

 2. Job Set-up Information______________________
　
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