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 (a) If there is 115VAC:
 - replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
 1 If the fault continues:
_
 - replace the J1 harness between the EIU-1 (1KS1) and the ECU (4000KS).
 (b) If there is no 115VAC:
 - do a check of the wiring between the EIU-1 (1KS1) pin AB/14F and the circuit breaker (1JH).
 1 If there is no continuity:
_ - repair the above wiring.
 2 If there is continuity:
_
 - replace the C/B-ENGINE/1 AND 2/IGN/SYS A (1JH).
 (3) If the fault continues:
 - make sure that there is no ground signal at the EIU-1 (1KS1) pin AA/5B.
 B. If the circuit breaker (1JH) is open:
 - close it.
 (1) If the circuit breaker trips:
 - remove the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and

 - remove the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040).

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 - do a check and repair the wiring for short to ground between the EIU-1 (1KS1) pin AB/14F and the circuit breaker (1JH).
 (a) If the fault continues:
 - replace the C/B-ENGINE/1 AND 2/IGN/SYS A (1JH).
 (3) If the circuit breaker stays closed:
 - install the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-400-040).
 (a) If the circuit breaker trips:

 - replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).

 (b) If the circuit breaker stays closed:

 - install the ECU (4000KS) (Ref. AMM TASK 73-21-60-400-001).
 1 If the circuit breaker trips:
_
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 2 If the circuit breaker trips again:
_
 - do a check and repair the wiring between the ECU (4000KS) pins J1/7 and the EIU-1 (1KS1) pin AB/14B.
 (4) If the fault continues:
 - make sure that there is no ground signal at the EIU-1 (1KS1) pin AA/5B.
 C. Do the test given in Para. 3.
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 TASK 71-50-00-810-802
 Loss of the 115VAC Power Supply on the ECU 2
 1. Possible Causes
_______________
 - EIU-2 (1KS2)

 - ECU (4000KS)

 - J1 harness

 - wiring

 - C/B-ENGINE/1 AND 2/IGN/SYS A (1JH)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
R 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 R (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 74-31/01
 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU ENGINE/1 AND 2/IGN/SYS A 1JH A03
 B. Test
 (1) If you cannot close the circuit breaker (1JH), refer to Para. 4.B.

 (2) Do the operational test of the FADEC 2A on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040)

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 4. Fault Isolation
_______________
 A. If the circuit breaker (1JH) is closed and if the test gives the maintenance message J1, 115 VAC, ECU:
R  CAUTION : WHEN THE "ENG/MASTER" LEVER IS IN THE "ON" POSITION, BE VERY_______
R  CAREFUL NOT TO SET THE "ENG/MODE" SELECTOR SWITCH TO "CRANK" OR
　
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