DTC C1231/31 Steering Angle Sensor Circuit Malfunction; DTC C1335/35 Steering Angle Sensor Circuit: Description

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
C1231/31	When ECU IG1 terminal voltage is 9.5 V or more, ECU receives sensor fail data from steering angle sensor for 1 sec. or more	Steering sensor Steering sensor circuit +BI circuit
C1335/35	Detection of either condition below: When ECU IG1 terminal voltage is 9.5 V or more, data transmission from steering angle sensor is impossible for 1 sec. or more Immediately after terminal BAT is connected and when IG1 terminal voltage is 9.5 V or more, open circuit of terminal TRIG continues for 15 sec. or more	Steering sensor Steering sensor circuit