Steering. Lexus Gs430, Gs300. Uzs190 Grs190
Steering Column. Lexus Gs430, Gs300. Uzs190 Grs190
Power Tilt And Power Telescopic Steering Column -- Problem Symptoms Table |
The power tilt & power telescopic steering column system uses the multiplex communication system, so check its diagnostic system before proceeding to troubleshooting. The table below will be useful in troubleshooting these electrical systems. The numbered suspected areas indicate the likelihood of the cause in descending order. Inspect each part in the order shown, and replace if found faulty.
- If the instruction "PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE" is given in the flow chart on the following pages, proceed to the circuit with the next highest number in the table below to continue the check.
- If the problem still occurs when there is no abnormality in the related circuits, check the multiplex tilt & telescopic ECU and replace if necessary.
| Symptom | Suspected area | See page |
| Only manual switch does not operate | 1. Tilt &telescopic manual switch circuit | Click here |
| 2. Windshield wiper switch assembly (Combination switch ECU) | Click here | |
| 3. Multiplex tilt &telescopic ECU | Click here | |
| Only auto away/return function does not operate | 1. Check status of auto away function using intelligent tester | Click here |
| 2. IG power source circuit | Click here | |
| 3. Multiplex tilt &telescopic ECU | Click here | |
| Only auto away function does not operate | 1. Push button start function (for 3GR-FE) | Click here |
| 2. Push button start function (for 3GR-FSE) | Click here | |
| 3. Push button start function (for 3UZ-FE) | Click here | |
| 4. Multiplex tilt &telescopic ECU | Click here | |
| Only auto return function does not operate | 1. Push button start function (for 3GR-FE) | Click here |
| 2. Push button start function (for 3GR-FSE) | Click here | |
| 3. Push button start function (for 3UZ-FE) | Click here | |
| 4. Multiplex tilt &telescopic ECU | Click here | |
| Only memory function does not operate | 1. Driving position memory switch | - |
| 2. Multiplex tilt &telescopic ECU | Click here |