Test Step 1. Inspect Electrical Connectors and Wiring -807640576

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TM 9-2320-312-24-2

Troubleshooting Section

Test Step 1. Inspect Electrical Connectors

Expected Result:

and Wiring.

All connectors, pins and sockets should be

completely coupled and/or inserted and the harness

and wiring should be free of corrosion, abrasion

or pinch points.

Results:

OK Proceed to Test Step 2.

Not OK

Repair: Perform the following repair:

Repair the connectors or wiring and/or replace

the connectors or wiring. Ensure that all of the

seals are properly in place and ensure that the

connectors are completely coupled.

Verify that the repair eliminates the problem.

STOP.

Test Step 2. Use ET to Check the Relay.

A. Connect ET to the cab data link connector.

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

C. Access the special test"Starting Aid Output" on

ET. The "Starting Aid Output" test will enable

output 2 when the test is active.

D. Begin the "Starting Aid Output" test and listen for

the relay to "click". You may need to be near the

engine in order to hear the "click".

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Illustration 172

Expected Result:

Pin locations for output 2

A. Thoroughly inspect ECM vehicle harness

The relay activates when the special test is enabled.

connector J1/P1, and the firewall bulkhead

connector.

Results:

Refer to Troubleshooting, "Electrical Connectors

Yes The ECM and vehicle components are

- Inspect" for details.

operating correctly. STOP.

B. Perform a 45 N (10 lb) pull test on terminal 10

No Proceed to Test Step 3.

in the ECM connector.

C. Check the ECM connector (allen head screw) for

the proper torque of 6.0 Nm (55 lb in).

D. Check the harness and wiring for abrasion and

for pinch points from the sensor to the ECM.