Test Step 9. Use the "Cooling Fan Solenoid Special Test" on ET to Check the Circuit

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TM 9-2320-312-24-2

Troubleshooting Section

Results:

Yes Proceed to Test Step 9.

Repair: Temporarily connect another sensor. Test

the new sensor by checking "Inlet Manifold Air

Temperature" and "Coolant Temperature" again.

If the problem is resolved with the new sensor,

then install the old sensor in order to verify that

the problem returns. If the problem returns, then

replace the old sensor.

Verify that the repair eliminates the problem.

STOP.

Test Step 9. Use the "Cooling Fan

Solenoid Special Test" on ET to Check

the Circuit.

g00676097

Illustration 73

Connector for the Breakout T

A. Connect ET to the cab data link connector.

Expected Result:

An audible clicking is heard, and the solenoid

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

appears to be operating properly.

C. Access the "Cooling Fan Special Test". Access

each menu in the order that follows:

Results:

Diagnostics

Yes The cooling fan circuit from the ECM to the

Solenoid is functioning properly at this time.

Diagnostic Tests

Repair: If a problem still exists, then the problem

Special Test

is in the OEM Wiring. Repair the problem or send

the vehicle to the OEM dealer for repair.

NOTE: If any override switches are installed, the

Verify that the repair eliminates the problem.

switch must be in the OFF position.

D. Cycle the "Special Test" to the ON position and

STOP.

to the OFF position. Listen for the solenoid to

No Proceed to Test Step10.

click. You may need to be near the engine in

order to hear the click of the solenoid.