Problem Symptoms Table
WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
The power tilt and 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 suspect 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 on the table" is given in the flow chart in the following information, proceed to the circuit with the next highest number in the table to continue the check.
- If the problem still occurs even though there is no abnormality in the related circuits, check and replace the multiplex tilt and telescopic ECU.
POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM
TROUBLESHOOTING TABLE
| Symptom | Suspected area | Information |
|---|---|---|
| Both tilt and telescopic: Manual, auto away/return and memory functions | Multiplex communication system | DTC CHECK/CLEAR |
| ECU power source circuit | DTC B2620: ECU POWER SOURCE CIRCUIT MALFUNCTION | |
| Unlock warning switch circuit | DTC B2602: KEY UNLOCK WARNING SWITCH CIRCUIT MALFUNCTION | |
| Actuator power source circuit | ACTUATOR POWER SOURCE CIRCUIT | |
| Tilt position sensor or tilt motor circuit | DTC B2610: TILT POSITION SENSOR OR TILT MOTOR CIRCUIT MALFUNCTION | |
| Telescopic position sensor or telescopic motor circuit | DTC B2611: TELESCOPIC POSITION SENSOR OR TELESCOPIC MOTOR CIRCUIT MALFUNCTION | |
| Tilt only: Manual, auto away / return and memory functions | Tilt position sensor or tilt motor circuit | DTC B2610: TILT POSITION SENSOR OR TILT MOTOR CIRCUIT MALFUNCTION |
| Telescopic only: Manual, auto away / return and memory functions | Telescopic position sensor or telescopic motor circuit | DTC B2611: TELESCOPIC POSITION SENSOR OR TELESCOPIC MOTOR CIRCUIT MALFUNCTION |
| Both tilt and telescopic: Only tilt and telescopic manual switch does not operate | Tilt & telescopic manual switch circuit | DTC B2603: TILT AND TELESCOPIC MANUAL SWITCH CIRCUIT MALFUNCTION |
| Both auto away and return: Only auto away/return function does not operate | Check status of auto away function using intelligent tester | - |
| Multiplex communication system | PRECAUTION | |
| Ignition switch | INSPECTION | |
| Unlock warning switch circuit | DTC B2602: KEY UNLOCK WARNING SWITCH CIRCUIT MALFUNCTION | |
| Auto away only: Only auto away function does not operate | Unlock warning switch circuit | DTC B2602: KEY UNLOCK WARNING SWITCH CIRCUIT MALFUNCTION |
| Ignition switch | INSPECTION | |
| Auto return only: Only auto away function does not operate | Unlock warning switch circuit | DTC B2602: KEY UNLOCK WARNING SWITCH CIRCUIT MALFUNCTION |
| Ignition switch | INSPECTION | |
| Only memory function does not operate | Multiplex communication system | PRECAUTION |