Loss of the Bus from the EIU1

TASK 36-11-00-810-855-A
Loss of the Bus from the EIU1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 36-11-00-740-001	BITE Test of the BMC 1(2)
ASM 361103
AMM 36-11-34-000-001	Removal of the BMC
AMM 36-11-34-400-001	Installation of the BMC
AMM 73-25-34-000-040	Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-040	Installation of the Engine Interface Unit (EIU)

3. Fault Confirmation
Subtask 36-11-00-710-154-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test of the BMC1 AMM 36-11-00-740-001.

4. Fault Isolation
Subtask 36-11-00-810-103-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message:
NO DATA FROM EIU

(1) If the fault continues:

do a check and repair the wiring of the VALVE CLOSURE FOR ENGINE START signal from the BMC1 (1HA1) to the EIU1 (1KS1), pins AA/7C and AA/8C to pins AB/5H and AB/5K ASM 361103.

(2) If the fault continues:

Subtask 36-11-00-810-103-C ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message:
NO DATA FROM EIU1

(1) If the fault continues:

do a check of the wiring ASM 361103 between:
. pin AA/7C of the BMC1 (1HA1) and pin AB/5H of the EIU1 (1KS1)
. pin AA/8C of the BMC1 and pin AB/5K of the EIU1.

(a) If the wiring is not correct:

(b) If the wiring is correct:

Subtask 36-11-00-710-155-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:45 UTC