PS Warning Light Remains ON

POWER STEERING: POWER STEERING SYSTEM: PS Warning Light Remains ON
- PS Warning Light Remains ON

DESCRIPTION

The power steering ECU is connected to the combination meter via CAN communication. If any of the following are detected, the PS warning light remains on.

* The power steering ECU connectors are disconnected from the power steering ECU.

* There is a malfunction in the power steering ECU internal circuit.

* There is an open in the harness between the combination meter and power steering ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (E/G RM-IG1-1)

(a) Remove the E/G RM-IG1-1 fuse from the engine room No. 2 relay block.

(b) Measure the resistance of the fuse.

Standard resistance:





NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR

(a) Start the engine.

(b) Check the indication condition of the PS warning light by wiggling the power steering ECU connector and wire harness up and down, and right and left.

OK:

PS warning light indication condition does not change.

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

3. CHECK CAN COMMUNICATION SYSTEM

(a) Using the Techstream, check for DTCs and confirm that there are no problems in the CAN communication system Diagnosis System.

Result:





B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

4. CHECK BRAKE CONTROL SYSTEM

(a) Using the Techstream, check for DTCs and confirm that there are no problems in the brake control system.

Result:





B -- GO TO BRAKE CONTROL SYSTEM How To Proceed With Troubleshooting
A -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BATTERY AND BODY GROUND)

(a) Disconnect the A44 ECU connector.





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

Standard voltage:





(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.

6. REPLACE POWER STEERING ECU

(a) Replace the power steering ECU Removal.

(b) After replacing the power steering ECU, check the illumination condition of the combination meter's PS warning light.

OK:

Engine switch turned on (IG), illuminated -> engine started, turns off.

NOTICE:
If replacing the power steering ECU, initialize the rotation angle sensor value and calibrate the torque sensor zero point Power Steering System.

NG -- REPLACE COMBINATION METER ASSEMBLY Removal

OK -- END