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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 31 (Power Assist Systems) >> Power Steering System >> DTC C1531: ECU Malfunction; DTC C1533: ECU Malfunction; DTC C1534: ECU Malfunction >> Description

DTC C1531: ECU Malfunction; DTC C1533: ECU Malfunction; DTC C1534: ECU Malfunction: Description

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

If the power steering ECU assembly detects these DTCs, it will shut off the motor current sensor, power source relay, motor relay circuit (built into the power steering ECU assembly) and stop power assistance.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
C1531 ECU internal malfunction (CPU malfunction) is detected Power steering ECU assembly
C1533 ECU internal malfunction (Substrate temp sensor malfunction) is detected Power steering ECU assembly
C1534 ECU internal malfunction (EEPROM error) is detected Power steering ECU assembly
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