The heated steering wheel control module controls the heated steering wheel and the heated steering wheel ON indicator based on an input from the heated steering wheel switch. When the heated steering wheel switch is pressed, the switch signal circuit is pulled to ground. This indicates to the heating steering wheel control module that steering wheel heat is requested. When the request is seen, the heat steering module supplies voltage to the indicator lamp and supplies voltage to the heating elements, which are internal to the module.

Schematic Reference

Tilt/Telescoping Steering Column Schematics

Connector End View Reference

Component Connector End Views for Component Connector End View

Description and Operation

Steering Wheel and Column Description and Operation

Electrical Information Reference

Ignition ON, press and release the heated steering wheel switch. The heated steering wheel indicator should illuminate and the left and right sides of the steering wheel should become warm.

1. Ignition OFF, disconnect the harness connector at the heated steering wheel control module.
2. Test for less than 1.0 ohm between the ground circuit terminal D and ground.

⇒	If greater than the specified value, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal A and ground.

⇒	If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

4. Install a 3A fused jumper wire between the control circuit terminal C and B+. Verify the heated steering wheel indicator is illuminated.

⇒	If the indicator does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the left steering wheel control switch.

5. Connect a test lamp between the supply voltage circuit terminal B and B+.
6. Cycle the heated steering wheel switch. The test lamp should turn ON and OFF when changing between the commanded states.

⇒	If the test lamp is always ON, test the supply voltage circuit for a short to ground. If the circuit tests normal, test or replace the left steering wheel control switch.

⇒	If the test lamp is always OFF, test the supply voltage circuit for a short to voltage or and open/high resistance. If the circuit tests normal, test or replace the left steering wheel control switch.

7. If all circuits test normal, replace the heated steering wheel control module

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.