Cruise Control System
NOTE:
Before troubleshooting:
- Check the ECM (10A), Horn (10A), ECU #3 (10A) and ECU B+ (15A) fuse in the under - hood fuse/relay box.
- Check that the horn sounds.
- Check the tachometer to see if it works properly.
CRUISE CONTROL SYSTEM
| Symptom | Suspect Area | Refer To: |
|---|---|---|
| Cruise control cannot be set | Cruise control switch | See INSPECTION |
| Brake switch | See BRAKE SWITCH TEST | |
| A/T gear position switch | See AUTOMATIC TRANSAXLE SYSTEM | |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Cruise control cannot be set but indicator light does not go on | Dimming circuit in gauge | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Cruise speed is noticeably higher or lower than what was set | Vehicle speed sensor | See AUTOMATIC TRANSAXLE SYSTEM |
| Cruise control unit and actuator cable deflection | See BRAKE SWITCH TEST | |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Excessive overshooting or undershooting when trying to set speed | Cruise control unit and actuator cable deflection | See BRAKE SWITCH TEST |
| Vehicle speed sensor | See AUTOMATIC TRANSAXLE SYSTEM | |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Speed fluctuation on a flat road with cruise control set | Vehicle speed sensor | See AUTOMATIC TRANSAXLE SYSTEM |
| Cruise control unit and actuator cable deflection | See BRAKE SWITCH TEST | |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Vehicle does not decelerate or accelerate accordingly when SET/RESUME/CANCEL button is pushed | Cruise control switch | See INSPECTION |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Cruise control does not cancel when shift lever is moved to N position (A/T) | A/T gear position switch | See AUTOMATIC TRANSAXLE SYSTEM |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Set speed is not cancelled when brake pedal is pushed | Brake switch | See BRAKE SWITCH TEST |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Cruise control will not cancel when main switch is pushed OFF | Cruise control switch | See INSPECTION |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Cruise control will not cancel when CANCEL button is pushed | Cruise control switch | See INSPECTION |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| Set speed will not resume when RESUME button (with main switch on, when set speed is temporarily cancelled) | Cruise control switch | See INSPECTION |
| Cruise control unit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) | |
| The transmission shifts down slower than normal when going up a hill with the cruise control on (A/T) | Troubleshooting the cruise control communication circuit | See CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T) |