Terminals at the Engine Harness Connector

249

TM 9-2320-312-24-2

Troubleshooting Section

Terminals at the Engine Harness

Connector.

g00664397

Illustration 85

Terminals for the pressure sensor connector

3. Ensure that the diagnostic code is no longer

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

active.

B. Fabricate a jumper wire 150 mm (6 inch) long.

4. Verify that the repair eliminates the problem.

Crimp a Deutsch terminal to both ends of the

wire.

STOP.

C. Monitor the "Active Diagnostic Code" screen

Not OK The open circuit diagnostic code

before installing the jumper wire and after

installing the jumper wire.

remains active when the jumper is installed. The

most probable location for the open is in the

D. Install the jumper on the engine harness

sensor common or the sensor signal wire in the

connector. Install one end of the jumper at the

engine harness between the ECM and the sensor.

sensor signal (terminal "C"). Install the other

Remove the jumper. Proceed to Test Step 9.

end of the jumper at the common connection

for the pressure sensor (terminal "B"). Wait at

least 15 seconds for activation of the short circuit

diagnostic code.

Refer to Illustration 85.

Expected Result:

A short circuit diagnostic code is active when the

jumper is installed. An open circuit diagnostic code

is active when the jumper is removed.

Results:

OK The engine harness and the ECM are OK.

Repair: Perform the following repair:

1. Temporarily connect the suspect sensor.

2. If the diagnostic code remains active, replace

the sensor.