Failure of the Control of the Starter Shutoff Valve Solenoids through the two Channels on Engine 1

TASK 80-11-00-810-809-A
Failure of the Control of the Starter Shutoff Valve Solenoids through the two Channels on Engine 1

1. Possible Causes

ECU [4000KS]
harness J9
harness J10
starter shutoff valve

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 80-11-00-710-066-A ** ON A/C NOT FOR ALL

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

4. Fault Isolation
Subtask 80-11-00-810-058-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance messages SAV, J9, ECU + SAV, J10, ECU:

do a check for open or short to ground of the harnesses J9 and J10 between the ECU (4000KS) and the starter shutoff valve solenoid, pins J9 and J10/11, 12 to pins J9 and J10/1, 2 ASM 743101.

(1) If one of these wirings is not correct:

repair the defective above wirings.

(2) If these wirings are correct:

disconnect the harnesses J9 and J10 from the ECU (4000KS) and do a check of the ECU resistance cables between:
. pins 11 and 12 (15 to 60 Ohms)
. pins 11 and 3 (> 10 Megohms)
. pins 11 and ground (> 10 Megohms).

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

replace the ECU [4000KS] AMM 73-21-60-000-001 AMM 73-21-60-400-001.

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

disconnect the harnesses J9 and J10 from the starter shutoff valve and do a check of the starter shutoff valve resistance between:
. pins 1 and 2 (15 to 60 Ohms)
. pins 1 and 5 (> 10 Megohms)
. pins 1 and ground (> 10 Megohms).

1 If the resistance values are in the specified values:

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

2 If the resistance values are out of the specified limits:

replace the starter shutoff valve AMM 80-11-20-000-001 AMM 80-11-20-400-001.

Subtask 80-11-00-810-058-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance messages SAV (SOL), J9, ECU + SAV (SOL), J10, ECU:

do a check for open or short to ground of the harnesses J9 and J10 between the ECU (4000KS) and the starter shutoff valve solenoid, pins J9 and J10/11, 12 to pins J9 and J10/1, 2 ASM 743101.

(1) If one of these wirings is not correct:

repair the defective above wirings.

(2) If these wirings are correct:

disconnect the harnesses J9 and J10 from the ECU (4000KS) and do a check of the ECU resistance cables between:
. pins 11 and 12 (15 to 60 Ohms)
. pins 11 and 3 (> 10 Megohms)
. pins 11 and ground (> 10 Megohms).

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

replace the ECU [4000KS] AMM 73-21-60-000-001 AMM 73-21-60-400-001.

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

disconnect the harnesses J9 and J10 from the starter shutoff valve and do a check of the starter shutoff valve resistance between:
. pins 1 and 2 (15 to 60 Ohms)
. pins 1 and 5 (> 10 Megohms)
. pins 1 and ground (> 10 Megohms).

1 If the resistance values are in the specified values:

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

2 If the resistance values are out of the specified limits:

replace the starter shutoff valve AMM 80-11-20-000-001 AMM 80-11-20-400-001.

Subtask 80-11-00-810-058-C ** ON A/C NOT FOR ALL

A. If the test gives the maintenance messages SAV (SOL), J9, ECU + SAV (SOL), J10, ECU:

do a check for open or short to ground of the harnesses J9 and J10 between the ECU (4000KS) and the starter shutoff valve solenoid, pins J9 and J10/11, 12 to pins J9 and J10/1, 2 ASM 743101.

(1) If one of these wirings is not correct:

repair the defective above wirings.

(2) If these wirings are correct:

disconnect the harnesses J9 and J10 from the ECU (4000KS) and do a check of the ECU resistance cables between:
. pins 11 and 12 (15 to 60 Ohms)
. pins 11 and 3 (> 10 Megohms)
. pins 11 and ground (> 10 Megohms).

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

replace the ECU [4000KS] AMM 73-21-60-000-001 AMM 73-21-60-400-001.

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

disconnect the harnesses J9 and J10 from the starter shutoff valve and do a check of the starter shutoff valve resistance between:
. pins 1 and 2 (15 to 60 Ohms)
. pins 1 and 5 (> 10 Megohms)
. pins 1 and ground (> 10 Megohms).

1 If the resistance values are in the specified values:

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

2 If the resistance values are out of the specified limits:

replace the starter shutoff valve AMM 80-11-20-000-003 AMM 80-11-20-400-003.

Subtask 80-11-00-710-067-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