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Diagnostic Procedure

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.

Visually check wire harness between engine electronic control unit and DLC3. Repair as necessary. Retrieve codes. See RETRIEVING CODES  under DIAGNOSTICS. If DTC is output again, replace air bag sensor assembly. See AIR BAG SENSOR ASSEMBLY  under REMOVAL & INSTALLATION. If no DTC is output, system operation is normal at this time. Check for intermittent fault. See AIR BAG WARNING LIGHT INTERMITTENT .

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