Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Cruise Control System
CRUISE CONTROL SYSTEM PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See page |
|---|---|---|
| Vehicle speed cannot be set. (The CRUISE main indicator light comes on.) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH | |
| Combination meter | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" CIRCUIT | |
| Transmission range sensor circuit (for U341E) | DIAGNOSTIC TROUBLE CODE CHART | |
| Transmission range sensor circuit (for U250E) | WIRING DIAGRAM | |
| Transmission range sensor circuit (for U140F) | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| Transmission control switch circuit (for U250E) | REASSEMBLY | |
| Clutch switch circuit (for M/T) | CLUTCH SWITCH CIRCUIT | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| The cruise control is canceled while it is operating. | Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" CIRCUIT |
| Clutch switch circuit (for M/T) | CLUTCH SWITCH CIRCUIT | |
| Transmission range sensor circuit (for U341E) | DIAGNOSTIC TROUBLE CODE CHART | |
| Transmission range sensor circuit (for U250E) | WIRING DIAGRAM | |
| Transmission range sensor circuit (for U140F) | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| Transmission control switch circuit (for U250E) | REASSEMBLY | |
| Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT | |
| Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH | |
| Combination meter | HOW TO PROCEED WITH TROUBLESHOOTING | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| Vehicle speed cannot be set. (The CRUISE main indicator light does not come on.) | Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" CIRCUIT |
| Clutch switch circuit (for M/T) | CLUTCH SWITCH CIRCUIT | |
| Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH | |
| Combination meter | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT | |
| Transmission range sensor circuit (for U341E) | DIAGNOSTIC TROUBLE CODE CHART | |
| Transmission range sensor circuit (for U250E) | WIRING DIAGRAM | |
| Transmission range sensor circuit (for U140F) | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| Transmission control switch circuit (for U250E) | REASSEMBLY | |
| Cruise main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| Vehicle speed can be set. (The CRUISE main indicator light does not come on.) | Cruise main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| Pulling back on the control main switch does not cancel the cruise control. (The CRUISE main indicator light remains on.) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| Pulling back on the control main switch does not cancel the cruise control. (The CRUISE main indicator light goes off.) | Replace ECM (for 2ZR-FE) | INSPECTION |
| Replace ECM (for 2AZ-FE) | ECM | |
| The cruise control is not canceled when vehicle speed drops below the low speed limit. (The CRUISE main indicator light remains on.) | Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| The cruise control is not canceled when vehicle speed drops below the low speed limit. (The CRUISE main indicator light goes off.) | Replace ECM (for 2ZR-FE) | INSPECTION |
| Replace ECM (for 2AZ-FE) | ECM | |
| Depressing the brake pedal does not cancel the cruise control. (The CRUISE main indicator light remains on.) | Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" CIRCUIT |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| Depressing the brake pedal does not cancel the cruise control. (The CRUISE main indicator light goes off.) | Replace ECM (for 2ZR-FE) | INSPECTION |
| Replace ECM (for 2AZ-FE) | ECM | |
| Depressing the clutch pedal does not cancel the cruise control. (The CRUISE main indicator light remains on.) | Clutch switch circuit (for M/T) | CLUTCH SWITCH CIRCUIT |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| Depressing the clutch pedal does not cancel the cruise control. (The CRUISE main indicator light goes off.) | Replace ECM (for 2ZR-FE) | INSPECTION |
| Replace ECM (for 2AZ-FE) | ECM | |
| Moving the shift lever does not cancel the cruise control. | Transmission range sensor circuit (for U341E) | DIAGNOSTIC TROUBLE CODE CHART |
| Transmission range sensor circuit (for U250E) | WIRING DIAGRAM | |
| Transmission range sensor circuit (for U140F) | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| Transmission control switch circuit (for U250E) | REASSEMBLY | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| Hunting (Speed is not constant.) | Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH |
| Combination meter | HOW TO PROCEED WITH TROUBLESHOOTING | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above areas have been inspected and have proven to be normal, replace the ECM. (for 2AZ-FE) | ECM | |
| The CRUISE main indicator light remains blinking. | TC and CG terminal circuit | TC AND CG TERMINAL CIRCUIT |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2ZR-FE) | INSPECTION | |
| If the symptom still occurs after the above area has been inspected and has proven to be normal, replace the ECM. (for 2AZ-FE) | ECM |