Failure of the Starter Shutoff Valve on Engine 1

TASK 80-11-00-810-811-A
Failure of the Starter Shutoff Valve on Engine 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 73-21-50-000-008	Removal of the J9 Harness
AMM 73-21-50-000-009	Removal of the J10 Harness
AMM 73-21-50-000-042	Removal of the HJ9 Harness for SAC Engines
AMM 73-21-50-000-043	Removal of the HJ10 Harness for SAC Engines
AMM 73-21-50-400-008	Installation of the J9 Harness
AMM 73-21-50-400-009	Installation of the J10 Harness
AMM 73-21-50-400-042	Installation of the HJ9 Harness for SAC Engines
AMM 73-21-50-400-043	Installation of the HJ10 Harness for SAC Engines
AMM 73-21-60-000-001	Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001	Installation of the Electronic Control Unit (ECU)
AMM 73-29-00-710-040	Operational Test of the FADEC on the ground (with Engine Motoring)
ASM 743101
AMM 80-11-20-000-001	Removal of the Starter Shutoff Valve
AMM 80-11-20-000-003	Removal of the Starter Shutoff Valve
AMM 80-11-20-400-001	Installation of the Starter Shutoff Valve
AMM 80-11-20-400-003	Installation of the Starter Shutoff Valve

3. Fault Confirmation
Subtask 80-11-00-710-070-A ** ON A/C NOT FOR ALL

A. Do the operational test of the FADEC 1B on the ground (with engine non motoring) AMM 73-29-00-710-040.

4. Fault Isolation
Subtask 80-11-00-810-060-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SAV, J9, J10:

do a check for open or short to ground of the harnesses J9 and J10 between the ECU (4000KS) and the starter shutoff valve ASM 743101.

(1) If the wiring is not correct:

(2) If the wiring is correct:

disconnect the harnesses J9 and J10 from the starter shutoff valve
install a jumper wire between the pins 3 and 4 on the harnesses J9 and J10
disconnect the harnesses J9 and J10 from the ECU (4000KS) and do a resistance check of each cable between:
. pins 9 and 10 (< 5 Ohms)
. pins 9 and 3 (> 10 Megohms)
. pin 9 and the ground (> 10 Megohms).

(a) If the resistance values are in the specified limits:

(b) If the resistance values are out of the specified limits:

replace the defective harness J9 AMM 73-21-50-000-008 and AMM 73-21-50-400-008 or
replace the defective harness J10 AMM 73-21-50-000-009 and AMM 73-21-50-400-009.

(3) If the fault continues:

Subtask 80-11-00-810-060-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SAV (SW), J9/J10, ECU or SAV (SW), J9/J10, ECU*:

do a check for open or short to ground of the harnesses J9 and J10 between the ECU (4000KS) and the stater shutoff valve ASM 743101.

(1) If the wiring is not correct:

(2) If the wiring is correct:

disconnect the harnesses J9 and J10 from the starter shutoff valve
install a jumper wire between the pins 3 and 4 on the harnesses J9 and J10
disconnect the harnesses J9 and J10 from the ECU (4000KS) and do a resistance check of each cable between:
. pins 9 and 10 (< 5 Ohms)
. pins 9 and 3 (> 10 Megohms)
. pin 9 and the ground (> 10 Megohms).

(a) If the resistance values are in the specified limits:

(b) If the resistance values are out of the specified limits:

replace the defective harness J9 AMM 73-21-50-000-042 and AMM 73-21-50-400-042 or
replace the defective harness J10 AMM 73-21-50-000-043 and AMM 73-21-50-400-043.

(3) If the fault continues:

Subtask 80-11-00-810-060-C ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SAV (SW), J9/J10, ECU*:

do a check for open or short to ground of the harnesses J9 and J10 between the ECU (4000KS) and the stater shutoff valve ASM 743101.

(1) If the wiring is not correct:

(2) If the wiring is correct:

disconnect the harnesses J9 and J10 from the starter shutoff valve
install a jumper wire between the pins 3 and 4 on the harnesses J9 and J10
disconnect the harnesses J9 and J10 from the ECU (4000KS) and do a resistance check of each cable between:
. pins 9 and 10 (< 5 Ohms)
. pins 9 and 3 (> 10 Megohms)
. pin 9 and the ground (> 10 Megohms).

(a) If the resistance values are in the specified limits:

(b) If the resistance values are out of the specified limits:

replace the defective harness J9 AMM 73-21-50-000-008 and AMM 73-21-50-400-008 or
replace the defective harness J10 AMM 73-21-50-000-009 and AMM 73-21-50-400-009.

(3) If the fault continues:

Subtask 80-11-00-710-071-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:38:39 UTC