- repair the defective harness J3 or the wiring.

 (2) If these wirings are correct:

 - replace the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
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E F 『 E C F M E E E E 56 E E E (3) If the fault continues:

 - replace the CFDIU (1TW) (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
 (4) If the fault continues:
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 B. Do the test given in Para. 3.A.
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 TASK 73-25-00-810-905
 Loss of the Date Data on the ARINC Bus from the EIU to the FADEC on Engine 1
 1. Possible Causes
_______________
 - EIU-1 (1KS1)

 - harness J3 from the EIU-1 (1KS1) to the ECU (4000KS)

 - wiring from CFDIU (1TW) to the EIU (1KS1)

 - CFDIU (1TW)

 - ECU (4000KS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION

 -------------------------------------------------------------------------------
AMM 31-32-34-000-001 Removal of the CFDIU (1TW)
 AMM 31-32-34-400-001 Installation of the CFDIU (1TW)
 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 73-25-34-000-040 Removal of the Engine Interface Unit (EIU) (1KS1,1KS2) AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU) (1KS1,1KS2) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine non Motoring) ASM 73-25/06
 3. Fault Confirmation
__________________
 A. 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 CFDIU, EIU (DATE), J3*:
 - do a check for open or short to ground at pins AB/5A, 5C to pins J3/22, 23 of the harness J3 from the EIU-1 (1KS1) to the ECU (4000KS) and at pins AA/11F, 11G to pins AA/11C, 11B of the wiring from CFDIU (1TW) to the EIU (1KS1) (Ref. ASM 73-25/06).
 (1) If one of these wirings is not correct:

 - repair the defective harness J3 or the wiring.

 (2) If these wirings are correct:

 - replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
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E F 『 E C F M E E E E 56 E E E (3) If the fault continues:

 - replace the CFDIU (1TW) (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
 (4) If the fault continues:
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 B. Do the test given in Para. 3.A.
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 TASK 73-25-00-810-906
 Loss of the Date Data on the ARINC Bus from the EIU to the FADEC on Engine 2
 1. Possible Causes
_______________
 - EIU-2 (1KS2)

 - harness J3 from the EIU-2 (1KS2) to the ECU (4000KS)

 - wiring from CFDIU (1TW) to the EIU-2 (1KS2)

 - CFDIU (1TW)

 - ECU (4000KS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION

 -------------------------------------------------------------------------------
AMM 31-32-34-000-001 Removal of the CFDIU (1TW)
 AMM 31-32-34-400-001 Installation of the CFDIU (1TW)
 AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS)
　
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