Actuator Malfunction - Variable Gear Ratio Steering System

STEERING COLUMN: VARIABLE GEAR RATIO STEERING SYSTEM: C15A3/63, C15C5/69: Actuator Malfunction
C15C5/69 - Motor Revolution Angle Signal (Test Mode DTC)

DESCRIPTION

The steering actuator drives the internal motor using the current output from the steering control ECU to change the relative angle between the tire angle and steering wheel angle.

The rotation angle sensor in the steering actuator detects the motor rotation angle and outputs this information to the steering control ECU.

If the steering control ECU detects a malfunction in the rotation angle sensor circuit, it will store DTC C15A3/63.





HINT
*: A tire angle of 36° and a motor rotation angle of 36° correspond to the steering wheel angle. The amount of change in tire angle and motor rotation angle is from when the mode is changed to test mode.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ACTUATOR)





(a) Disconnect the A41 steering control ECU connector.

(b) Disconnect the x2 steering actuator connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK STEERING ACTUATOR

(a) Disconnect the A41 steering control ECU connector.





HINT
The resistance must be measured after the steering actuator connector is connected.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPLACE STEERING ACTUATOR (POWER STEERING LINK ASSEMBLY) Removal

OK -- REPLACE STEERING CONTROL ECU Removal