Electronic Power Steering System - Fail-Safe Chart

If a problem occurs in the electronic power steering system, the P/S warning light will come on in the combination meter and steering power assistance will be stopped, fixed at a particular point, or decreased simultaneously to protect the system.

Electronic Power Steering System - Diagnosis System

Connecting the intelligent tester to the vehicle and reading various data output from the power steering ECU assembly is the only difference between usual troubleshooting procedures and those for a vehicle with a diagnostic system.


The power steering ECU assembly records DTCs when the ECU detects a malfunction in the computer itself or in its circuits.

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