The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate, and cancel switch signal circuits in order to detect when a cruise control function switch has been activated. The BCM detects a predetermined voltage signal when a cruise control function switch is applied, with each switch having a different voltage value.

Important: Repair any brake system related symptoms and DTCs before performing this diagnostic.

In order to avoid misdiagnosis, inspect for the following:

Schematic Reference

Connector End View Reference

Description and Operation

Cruise Control Description and Operation

Electrical Information Reference

Scan Tool Reference

Important: Repair any brake system related symptoms and DTCs before performing this diagnostic.

Ignition ON, cruise on/off switch ON, rotate the steering wheel to both steering stops while activating each cruise control switch separately. With a scan tool, observe all cruise control switch parameters in the BCM. Verify that each cruise control switch activated and that each displayed switch position parameters match accordingly with each depressed switch, as the steering wheel is turned.

1. Ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
2. Disconnect the harness connector of the steering wheel control switch assembly - left.
3. Ignition ON, measure for 10 volts or greater between the 12-volt reference circuit terminal 1 and ground.

⇒	If less than 10 volts, test the 12-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

4. Ignition OFF, disconnect the harness connector X1 of the BCM.
5. Ignition OFF, test for 1.0 ohm of resistance or less between the steering wheel control switch assembly - left terminal 3 and the BCM X1 terminal 3.

⇒	If greater than the specified range, test the cruise control switch signal circuit for an open/high resistance.

6. Ignition OFF, test for infinite resistance between the BCM X1 terminal 3 and ground.

⇒	If less than the specified value, test the cruise control switch signal circuit for a short to ground.

7. Ignition ON, test for 0 volts between the BCM X1 terminal 3 and ground.

⇒	If greater than the specified value, test the cruise control switch signal circuit for a short to voltage.

8. Test the component. If all circuits and the component tests are normal, replace the BCM.

Important: The cruise control ON/OFF switch must be ON in order to properly measure the resistance of the - SET, the + RES, and the Cancel switches.

1. With the ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
2. With the ignition OFF, disconnect the harness connector at the steering wheel control switch assembly - left.
3. Measure the resistance between terminals 1 and 3 at the cruise control switch side of the connector. Individually activate and hold each cruise control function switch and compare the resistance reading to the values on the schematic for the ON/OFF, - SET, the + RES, and the Cancel switches.

⇒	If any of the resistance measurements for the OFF, ON, - SET, + RES, and Cancel switches are not within the listed resistance values, replace the cruise control switch assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.