Problem Symptoms Table
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
This system uses the multiplex communication system, so check diagnosis system of the multiplex communication system before you proceed with troubleshooting.
The table below will be useful for you in troubleshooting these electrical systems. The most likely causes of the malfunction are shown in the order of their probability. Inspect each part in the order shown, and replace the part when it is found to be faulty.
If the instruction "Proceed to next circuit inspection shown on the chart" is given in the flow chart for each circuit, proceed to the circuit with the next highest number in the table to continue the check.
If the problem still occurs even though there are no abnormalities in any of the other circuits, then check and replace ECU.
PROBLEM SYMPTOMS REFERENCE
| Symptom | Suspect Area | See Section |
|---|---|---|
| Both tilt and telescopic: Manual, auto away/return and memory functions
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| Tilt only: Manual, auto away/return and memory functions
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| Telescopic only: Manual, auto away/return and memory functions
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| Both tilt and telescopic: Only tilt and telescopic manual switch function does not operate |
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| Tilt only: Only tilt and telescopic manual switch function does not operate |
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| Telescopic only: Only tilt and telescopic manual switch function does not operate |
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| Both away and return: Only auto away/return function does not operate |
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| Only away: Only auto away/return function does not operate |
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| Only return: Only auto away/return function does not operate |
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