PS Warning Light Remains ON

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: PS Warning Light Remains ON

PS Warning Light Remains ON

DESCRIPTION

If the power steering ECU detects a malfunction, the P/S warning light comes on. At this time, the power steering ECU stores a DTC in its memory.

WIRING DIAGRAM

1. w/ Smart Key System

2. w/o Smart Key System

INSPECTION PROCEDURE
NOTICE: If the power steering ECU has been replaced with a new one, perform the rotation angle sensor initialization and torque sensor zero point calibration Programming and Relearning.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR
(a) Turn the ignition switch to ON.
(b) Check the indication condition of the P/S warning light by wiggling the power steering ECU connector and wire harness up and down, and right and left.
OK:
P/S warning light indication condition does not change.

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

2. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)
(a) Check for DTCs Diagnosis System.
OK:
DTC is not output.

NG -- GO TO CAN COMMUNICATION SYSTEM
OK -- Continue to next step.

3. READ VALUE USING TECHSTREAM (IG POWER SUPPLY)
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / EMPS / Data List.
(f) Select the items "IG Power Supply" in the Data List and read the value displayed on the Techstream.

EMPS

OK:
Normal condition value is displayed the Techstream.

Result

C -- INSPECT CHARGING SYSTEM
B -- INSPECT CHARGING SYSTEM
A -- Continue to next step.

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

(a) Disconnect the connectors from the power steering ECU.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:

Text in Illustration

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

5. REPLACE POWER STEERING ECU
(a) Replace the power steering ECU Removal.
(b) Check the P/S warning light condition.
OK:
P/S warning light remains on when the ignition switch is ON and goes off after engine start.

NG -- GO TO METER / GAUGE SYSTEM
OK -- END