Problem Symptoms Table
WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
CRUISE CONTROL SYSTEM
PROBLEM SYMPTOMS TABLE (CRUISE CONTROL SYSTEM)
| Symptom | Suspected area |
|---|---|
| Main switch cannot be turned ON. (CRUISE main indicator light on combination meter does not illuminate.) | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 3. Hybrid vehicle control ECU. See 1 | |
| 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 |
| 2. Hybrid vehicle control ECU. See 1 | |
| 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 |
| 2. Stop light switch circuit. SeeDTC P0571 STOP LIGHT SWITCH CIRCUIT MALFUNCTION | |
| 3. Park/neutral position switch circuit (DTC P0705) | |
| 4. COMBINATION METER | |
| 5. Hybrid vehicle control ECU. See 1 | |
| While the vehicle is driving with cruise control, the set control is canceled. (CRUISE main indicator light remains illuminated.) | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. VEHICLE SPEED SENSOR CIRCUIT | |
| 3. STOP LIGHT SWITCH CIRCUIT | |
| 4. CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 5. Park/neutral position switch circuit (DTC P0705) | |
| 6. Hybrid vehicle control ECU. See 1 | |
| Hunting (Speed is not constant.) | 1. VEHICLE SPEED SENSOR CIRCUIT |
| 2. Hybrid vehicle control ECU. See 1 | |
| Vehicle speed setting cannot be canceled. (When Coast, Acceleration, Resume, Set speed change and Control switch are operated.) | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. Hybrid vehicle control ECU. See 1 | |
| DTC is not output, or is output when it should not be. | 1. Diagnosis circuit. See CRUISE MAIN INDICATOR LIGHT CIRCUIT |
| 2. Hybrid vehicle control ECU. See 1 | |
| CRUISE MAIN indicator light does not come on. | 1. CRUISE CONTROL SWITCH CIRCUIT |
| 2. CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 3. Hybrid vehicle control ECU. See 1 | |
| 4. COMBINATION METER |