Cruise Control System. Lexus Gs430, Gs300. Uzs190 Grs190
Cruise Control. Lexus Gs430, Gs300. Uzs190 Grs190
Cruise Control System -- 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 | Suspected area | See page |
| Main switch cannot be turned ON. (CRUISE main indicator light on combination meter does not illuminate.) | 1. Cruise control switch circuit | Click here |
| 2. CRUISE main indicator light circuit | Click here | |
| 3. ECM | Click here | |
| 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 | Click here |
| 2. ECM | Click here | |
| 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 | Click here |
| 2. Stop light switch circuit | Click here | |
| 3. Park / neutral position switch circuit (DTC P0705) | Click here | |
| 4. Transmission control switch circuit (3GR-FE) | Click here | |
| 4. Transmission control switch circuit (3GR-FSE) | Click here | |
| 4. Transmission control switch circuit (3UZ-FE) | Click here | |
| 5. Combination meter system | Click here | |
| 6. ECM | Click here | |
| While the vehicle is driving with cruise control, the set control is canceled. (CRUISE main indicator light remains illuminated.) | 1. Cruise control switch circuit | Click here |
| 2. Vehicle speed sensor circuit | Click here | |
| 3. Stop light switch circuit | Click here | |
| 4. CRUISE main indicator light circuit | Click here | |
| 5. Park / neutral position switch circuit (DTC P0705) | Click here | |
| 6. ECM | Click here | |
| Hunting (Speed is not constant.) | 1. Vehicle speed sensor circuit | Click here |
| 2. ECM | Click here | |
| Vehicle speed setting cannot be canceled. (When Coast, Acceleration, Resume, Set speed change are operated.) | 1. Cruise control switch circuit | Click here |
| 2. ECM | Click here | |
| DTC is not output, or is output when it should not be. | 1. Diagnosis circuit | Click here |
| 2. ECM | Click here | |
| CRUISE main indicator light does not come on. | 1. Cruise control switch circuit | Click here |
| 2. CRUISE main indicator light circuit | Click here | |
| 3. ECM | Click here | |
| 4. Combination meter | - |