C15A6

STEERING COLUMN: VARIABLE GEAR RATIO STEERING SYSTEM: C15A2/62,C15A6/62: Actuator Malfunction


DESCRIPTION

The steering control ECU drives the actuator based on steering angle sensor signals and vehicle speed signals.

If the steering control ECU detects excessive current flowing into the steering actuator, or an internal malfunction, it will turn on the master warning light, store DTC C15A2/62, and stop VGRS operation.

If the steering control ECU detects a malfunction in the pre driver circuit, it will turn the master warning light on, store DTC C15A6/62, and stop VGRS operation.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
The actuator only can be checked in this procedure. If it is normal, the steering control ECU is faulty.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)





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

Standard resistance:





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

Standard voltage:





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

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





(a) Disconnect the A43 steering control ECU connector.

(b) Disconnect the z15 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.

3. CHECK STEERING ACTUATOR

(a) Disconnect the A43 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 GEAR ASSEMBLY) Removal
OK -- Continue to next step.

4. CHECK DTC

(a) Check for DTCs Variable Gear Ratio Steering System.

Result





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

OK -- REPLACE STEERING CONTROL ECU Removal