Failure of the OIL LOW PRESS & GROUND Discrete Output on EIU 1

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1. Possible Causes
· RELAY-OIL LOW PRESS AND GROUND, ENG 1 ( 10KS1 )
· RELAY-OIL LOW PRESS AND GROUND, ENG 1 ( 11KS1 )
· EIU-1 ( 1KS1 )
· wiring from the EIU 1 (1KS1) to the relay (10KS1)
· wiring from the EIU 1 (1KS1) to the relay (11KS1)
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. ASM 73-25-09
Ref. AMM 73-25-34-000-041 Removal of the Engine Interface Unit (EIU)
Ref. AMM 73-25-34-400-041 Installation of the Engine Interface Unit (EIU)
Ref. AMM 73-25-34-710-042 Operational Test of the EIU with the CFDS
3. Fault Confirmation
Subtask 73-25-00-710-066-A
A. Test
(1) Do the operational test of the EIU 1 with the CFDS Ref. AMM 73-25-34-710-042 .
4. Fault Isolation
Subtask 73-25-00-810-058-A
A. If the operational test gives the maintenance message CHECK 10KS1 RELAY CIRCUIT OR EIU1:
· replace the RELAY-OIL LOW PRESS AND GROUND, ENG 1 ( 10KS1 ) .
(1) If the fault continues:
· replace the RELAY-OIL LOW PRESS AND GROUND, ENG 1 ( 11KS1 ) .
(2) If the fault continues:
· replace the EIU-1 ( 1KS1 ) , Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041 .
(3) If the fault continues:
· do a check and repair the:
wiring from the EIU 1 (1KS1) to the relay (10KS1) pin AB/9D to pin A/X
wiring from the EIU 1 (1KS1) to the relay (11KS1) pin AB/9D to pin A/X
Ref. ASM 73-25-09.
Subtask 73-25-00-710-067-A
B. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:36:21 UTC