- replace the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).

 (2) If the fault continues:

 - do a check and repair the wiring from the EIU 2 (1KS2) to the relay (12KS2) pin AB/9C to pins AA/X, Z (Ref. ASM 73-25/09).
 B. Do the test given in Para. 3.A.
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 Failure of the Relay 15KS1 Control on the EIU 1
 1. Possible Causes
_______________
 - EIU-1 (1KS1)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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 73-25-34-710-044 Read the Class 3 Faults
 3. Fault Confirmation
__________________
 A. Test Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) to read the Class 3 Faults (Ref. AMM TASK 73-25-34-710-044).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK 15KS1 RELAY CIRCUIT OR EIU 1:
 - replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
 NOTE : As relay 15KS1 is not installed, no maintenance action in line is
____ necessary. When the message comes into view on the EIU Class 3 report, replace the EIU 1 at the "A" check that follows.
 B. If the EIU 1 (1KS1) is replaced:
 - do the test given in Para. 3.A.
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 Failure of the Relay 15KS1 Control on the EIU 2
 1. Possible Causes
_______________
 - EIU-2 (1KS2)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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 73-25-34-710-044 Read the Class 3 Faults
 3. Fault Confirmation
__________________
 A. Test Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) to read the Class 3 Faults (Ref. AMM TASK 73-25-34-710-044).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK 15KS2 RELAY CIRCUIT OR EIU 2:
 - replace the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
 NOTE : As relay 15KS2 is not installed, no maintenance action in line is
____ necessary. When the message comes into view on the EIU Class 3 report, replace the EIU 2 at the "A" check that follows.
 B. If the EIU 2 (1KS2) is replaced:
 - do the test given in Para. 3.A.
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 TASK 73-25-00-810-853
 Failure of the EIU on Engine 1
 1. Possible Causes
_______________
 - EIU-1 (1KS1)

 - aircraft wirings

 - C/B-ENGINE/1/FADEC A/AND EIU 1 (2KS1)

 - C/B-ENGINE/ENG1/FADEC B/AND EIU 1 (4KS1)

 - ECU (4000KS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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) R AMM 73-25-34-710-043 Operational Test of the Engine Interface Unit ASM 73-25/05
　
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