Problem Symptoms Table
If a normal system code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
HINT:
Inspect the "Fuse" and "Relay" before confirming the suspected areas as shown in the table below. Inspect each malfunction circuit in numerical order for the corresponding symptom.
SYMPTOM AND SUSPECTED AREAS CHART
| Symptom | Suspected area | See |
|---|---|---|
| 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. (CRUISE main indicator light on combination meter illuminates when main switch is turned ON, but turns off when operating SET function.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. 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.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Stop light switch circuit | DIAGNOSTIC TROUBLE CODE CHART | |
| 3. Park / neutral position switch circuit | REMOVAL | |
| 4. Transmission control switch circuit (3UZ-FE) | TRANSMISSION CONTROL SWITCH CIRCUIT | |
| 4. Transmission control switch circuit (3GR-FSE 2WD) | TRANSMISSION CONTROL SWITCH CIRCUIT | |
| 4. Transmission control switch circuit (3GR-FSE 4WD) | TRANSMISSION CONTROL SWITCH CIRCUIT | |
| 5. Combination meter system | COMBINATION METER | |
| 6. 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; DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH | |
| 3. Stop light switch circuit | DIAGNOSTIC TROUBLE CODE CHART | |
| 4. CRUISE main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 5. Park / neutral position switch circuit | REMOVAL | |
| 6. ECM | TERMINALS OF ECU | |
| Hunting (Speed is not constant.) | 1. Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH |
| 2. ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be canceled. (When Coast, Acceleration, Resume, Set speed change 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. TC and CG terminal 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 | - |