Cruise Control Inoperative/Malfunctioning

CRUISE CONTROL INOPERATIVE/MALFUNCTIONING

DIAGNOSTIC AIDS

CAUTION: Refer to SIR Caution in Service Precautions.

Disable the inflatable restraint steering wheel module when performing this diagnostic table. Refer to SIR Disabling and Enabling Zone 3 in Restraint Systems.

Perform the following in order to avoid a misdiagnosis:
- Ensure that the following cruise control switches are not stuck in the engaged position:
- On/off switch
- Set/coast switch
- Resume/accel switch
- With a scan tool, observe the cruise control function switch parameters, in the Body and Accessories, Cruise Control data list, while rotating the steering wheel to both steering stops and individually activating each cruise control function switch separately. This will help eliminate the possibility of an internally shorted inflatable restraint steering wheel module coil.
- Inspect for proper operation of the stop lamps. Refer to Exterior Lighting Systems Description and Operation in Lighting Systems.
- Electromagnetic interference (EMI) on the vehicle speed sensor (VSS) signal circuit may cause erratic cruise control operation.
- For an intermittent condition, refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.

TEST

Steps 1-9:

Steps 10-15:

Steps 16-24:

Steps 25-30: