Test Step 4. Insert a Jumper Wire at the Switch -807640475

297

TM 9-2320-312-24-2

Troubleshooting Section

No There is a problem in the wire harness

Results:

between the Ignore Brake/Clutch Switch and the

Yes The ECM is functioning properly at this

ECM. Proceed to Test Step 5.

time. Proceed to Test Step 4.

Test Step 5. Insert a Jumper Wire at the

Bulkhead Connector.

No The ECM is not functioning properly.

Repair: Perform the following repair:

A. Turn the ignition key switch to the OFF position.

1. Temporarily connect a test ECM.

B. Fabricate a jumper wire 100 mm (4 inch) long.

Crimp a Deutsch pin to both ends of the wire.

2. Remove all jumpers and replace all connectors.

C. Insert the jumper wire between the two terminals

3. Recheck the system for active diagnostic

for the ignore brake/clutch switch on the engine

codes.

side of the ECM bulkhead connector.

4. Repeat the test step.

D. Turn the ignition key switch to the ON position.

5. If the problem is resolved with the test ECM,

E. Alternately connect and then disconnect the

reconnect the suspect ECM.

jumper wire. At the same time, monitor the status

screen on ET.

6. If the problem returns with the suspect ECM,

replace the ECM.

Expected Result:

7. Verify that the repair eliminates the problem.

The switch status changes from On with the jumper

wire in place to "Off" when the jumper wire is

STOP.

removed.

Test Step 4. Insert a Jumper Wire at the

Results:

Switch.

Yes The problem is in the vehicle wiring

between the bulkhead connector and the switch.

A. Turn the ignition key switch to the OFF position.

Repair: Inspect the vehicle wiring and then repair

B. Reconnect the ECM vehicle harness connector

the vehicle wiring. Otherwise, send the vehicle to

J1/P1.

the OEM dealer for repair.

C. Fabricate a jumper wire 100 mm (4 inch) long.

Verify that the original condition is resolved.

Crimp a Deutsch pin to both ends of the wire.

D. Insert the jumper wire between the two terminals

STOP.

of the ignore brake/clutch switch.

No The problem is in the vehicle wiring between

E. Turn the ignition key switch to the ON position.

the bulkhead connector and the ECM.

F. Alternately remove the jumper wire and then

Repair: Inspect the vehicle wiring and then repair

insert the jumper wire at the switch terminals. At

the vehicle wiring. Otherwise, send the vehicle to

the same time, watch the status screen on ET.

the OEM dealer for repair.

Verify that the original condition is resolved.

Expected Result:

The switch status changes to On with the jumper

STOP.

wire in place to "Off" when the jumper wire is

removed.

Results:

Yes

Repair: Replace the ignore brake/clutch switch.

Verify that the repair eliminates the problem.

STOP.