Problem Symptoms Table
WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- Use the table below to help determine the cause of the problem symptom. 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
SYMPTOM CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Main switch cannot be turned ON. (CRUISE main indicator light on combination meter does not illuminate.) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| CRUISE main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be done. (CRUISE main indicator light on combination meter illuminates when main switch is turned ON, but turns off when operating SET function.) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be done. (CRUISE main indicator light on combination meter illuminates when main switch is turned ON, and remains illuminated when operating SET function.) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" CIRCUIT | |
| Park / neutral position switch circuit | For A750E Automatic Transaxle, see DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) (for 1GR-FE) or DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) (for 2UZ-FE), For A750F Automatic Transaxle, see DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) , For AB60E Automatic Transaxle, see DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) and For AB60F Automatic Transaxle, see DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| Combination meter system | HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | TERMINALS OF ECU | |
| While the vehicle is driving with cruise control, the SET control is canceled. (CRUISE main indicator light remains illuminated.) | 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 | |
| Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" CIRCUIT | |
| CRUISE main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| Park / neutral position switch circuit | For A750E Automatic Transaxle, see DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) (for 1GR-FE) or AUTOMATIC TRANSMISSION SYSTEM (FOR 2UZ-FE) (for 2UZ-FE), For A750F Automatic Transaxle, see DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) , For AB60E Automatic Transaxle, see DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) and For AB60F Automatic Transaxle, see DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| ECM | TERMINALS OF ECU | |
| Hunting (Speed is not constant.) | Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH |
| ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be canceled. (CANCEL function failure.) | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| ECM | TERMINALS OF ECU | |
| DTC is not output, or is output when it should not be. | TC and CG terminal circuit | TC AND CG TERMINAL CIRCUIT |
| ECM | TERMINALS OF ECU | |
| CRUISE main indicator light does not come on. | Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| CRUISE main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| ECM | TERMINALS OF ECU | |
| Combination meter | - |