Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
Before proceeding with the diagnostic procedure, verify that the connections are properly made, seated and verify proper pin terminal tension. A loose connection at any of the SCCM connectors may cause the DTC to set.
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

CHECK THE CRUISE CONTROL INPUT 1 VOLTAGE WITH THE SCAN TOOL

With the scan tool, navigate to SCCM, Data Display.

While monitoring the Cruise Control Input 1 voltage with the scan tool, press each Speed Control switch. Compare the scan tool voltage readings with the table below.

RIGHT STEERING WHEEL SWITCH (SPEED CONTROL SWITCH) SCAN TOOL VOLTAGE READINGS (AS READ IN SCCM DATA DISPLAY)
	CRUISE BUTTONS RELEASED	ON/OFF	RES +	SET -	CANCEL
Cruise Control Input 1 Voltage	4.55 volts	0.29 volt	3.31 volts	2.71 volts	0.9 volt

Do the voltages displayed on the scan tool match the voltages in the table?

Yes

Visually and physically inspect the wiring harness between the Right Steering Wheel Switch (Speed Control Switch) harness connector and the SCM C5 harness connector. Repair any damaged wires, connectors, and open/spread terminals. If harness is OK, test complete.
Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

Replace the Right Steering Wheel Switch (Speed Control Switch) in accordance with the Service Information. Refer to SWITCH, SPEED CONTROL, REMOVAL .
Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .