Problem Symptoms Table
WARNING: This page is about a different car, the 2006 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in PROBLEM SYMPTOMS TABLE and proceed to the relevant troubleshooting .
CRUISE CONTROL SYSTEM
PROBLEM SYMPTOMS TABLE
| Symptom | Suspected area | See |
|---|---|---|
| Main switch cannot be turned ON. (Cruise indicator light in combination meter is not lit.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. CRUISE MAIN indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 3. ECM | TERMINALS OF ECM | |
| Setting of vehicle speed cannot be done. (Although indicator light in combination meter is lit when the main | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. ECM | TERMINALS OF ECM | |
| Setting cannot be done. (Indicator light in combination meter is lit when the main switch is turned ON and it remains ON while setting.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Brake Switch "A" Circuit | DTC P0571 BRAKE SWITCH "A" Circuit | |
| 3. PNP switch circuit | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 4. Combination meter system | COMBINATION METER | |
| 5. ECM | TERMINALS OF ECM | |
| While the vehicle is driving with cruise control, the set control is canceled. (Indicator light and CRUISE remain ON.) | 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 CIRCUIT MALFUNCTION | |
| 3. Brake Switch "A" Circuit | DTC P0571 BRAKE SWITCH "A" Circuit | |
| 4. CRUISE MAIN indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 5. PNP switch circuit | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 6. ECM | TERMINALS OF ECM | |
| Hunting (Speed is not constant.) | 1. Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION |
| 2. ECM | TERMINALS OF ECM | |
| Setting cannot be cancelled. (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 ECM | |
| DTC is not output, or is output when should not be. | 1. TC and CG Terminal Circuit. | TC AND CG TERMINAL CIRCUIT |
| 2. ECM | TERMINALS OF ECM | |
| CRUISE MAIN indicator light does not light up. | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. CRUISE MAIN indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 3. ECM | TERMINALS OF ECM | |
| 4. Combination Meter System | COMBINATION METER |