Lexus IS250 IS220d GSE20 ALE20 - STEERING COLUMN
POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM - 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 a fault is found.
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 it if necessary.
| Symptom | Suspected area | See page |
| Only manual switch does not operate | 1. Tilt & telescopic manual switch circuit | |
| 2. Windshield wiper switch assembly (Combination switch ECU) | ||
| 3. Multiplex tilt & telescopic ECU | ||
| Only auto away/return function does not operate | 1. Check customize status of auto away function using intelligent tester | |
| 2. IG power source circuit | ||
| 3. Multiplex tilt & telescopic ECU | ||
| Only auto away function does not operate | 1. Push button start function (4GR-FSE) | |
| 2. Push button start function (2AD-FHV) | ||
| 3. Multiplex tilt & telescopic ECU | ||
| Only auto return function does not operate | 1. Push button start function (4GR-FSE) | |
| 2. Push button start function (2AD-FHV) | ||
| 3. Multiplex tilt & telescopic ECU | ||
| Only memory function does not operate | 1. Seat position memory switch | |
| 2. Multiplex tilt & telescopic ECU |
LEXUS IS250, IS220d / GSE20 ALE20