Problem Symptoms Table
CRUISE CONTROL SYSTEM
PROBLEM SYMPTOM TABLE
| Symptom | Suspected area | Proceed to |
|---|---|---|
| Main switch cannot be turned ON. (CRUISE main indicator light on combination meter does not illuminate.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Cruise main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 3. ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be done. (Although indicator light in combination meter is lit when the main switch is turned ON, they go off when vehicle speed is set.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. ECM | TERMINALS OF ECU | |
| Setting cannot be done. (Indicator light in combination meter is lit when the main switch is turned ON and they remain ON while setting.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" Circuit | |
| 3. PNP switch circuit | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 4. Combination meter system | HOW TO PROCEED WITH TROUBLESHOOTING | |
| 5. ECM | TERMINALS OF ECU | |
| While the vehicle is driving with cruise control, the set control is canceled. (CRUISE main indicator light remains illuminated.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Vehicle speed sensor circuit | DTC P0500 Vehicle Speed Sensor Malfunction | |
| 3. Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" Circuit | |
| 4. Cruise main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 5. Park/neutral position switch circuit (DTC P0705) | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 6. ECM | TERMINALS OF ECU | |
| Hunting (Speed is not constant.) | 1. Vehicle speed sensor circuit | DTC P0500 Vehicle Speed Sensor Malfunction |
| 2. ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be canceled. (When Coast, Acceleration, Resume, Set speed change and Control switch are operated.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. ECM | TERMINALS OF ECU | |
| DTC is not output, or is output when it should not be. | 1. Diagnosis circuit | TC and CG Terminal Circuit |
| 2. ECM | TERMINALS OF ECU | |
| CRUISE MAIN indicator light does not come on. | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Cruise main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 3. ECM | TERMINALS OF ECU | |
| 4. Combination meter | HOW TO PROCEED WITH TROUBLESHOOTING |