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.

Ensure that the following cruise control switches are not stuck in the engaged position:
- On/Off switch
- Set/Coast switch
- Resume/Accel switch

Perform the following in order to avoid misdiagnosis:
- Inspect for proper operation of the stop lamps.
- Rotate the steering wheel to both steering stops and activate each cruise control switch separately. With a scan tool, observe the associated Cruise Control Switch parameter in the Idle/Speed Control data list. This will help eliminate the possibility of a internally open or shorted inflatable restraint steering wheel module coil.
- EMI on the speed sensor signal circuit may cause erratic cruise control operation.
- For an intermittent condition, refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.

TEST

Steps 1-10:

Steps 11-20: