C15A2

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

DTC C15A2/62 - Actuator Malfunction

DTC 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 WIRE HARNESS (POWER SOURCE CIRCUIT)





(a) Turn the power switch OFF.
(b) Measure the resistance of the A40 steering control ECU connector.
Standard resistance:





(c) Turn the power switch ON (IG).
(d) Measure the voltage of the A40 steering control ECU connector.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR FUSE
OK -- Continue to next step.
2. CHECK WIRE HARNESS (STEERING CONTROL ECU - STEERING ACTUATOR)





(a) Turn the power switch OFF.
(b) Disconnect the K69 steering control ECU connector.
(c) Disconnect the K26 steering actuator connector.
(d) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK STEERING ACTUATOR





(a) Disconnect the K69 steering control ECU connector.
HINT: The resistance must be measured after the steering actuator connector is connected.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPLACE STEERING ACTUATOR
OK -- Continue to next step.
4. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG) and turn the Techstream on.
(c) Check for DTCs Variable Gear Ratio Steering System.
Result:






NG -- REPLACE STEERING ACTUATOR
OK -- REPLACE STEERING CONTROL ECU