POWER STEERING SYSTEM (for 2AZ-FE) > EPS Warning Light Circuit

for Preparation Click here


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


C113535E13


C113536E04


INSPECTION PROCEDURE

NOTICE:
If the steering column assembly or power steering ECU has been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration (Click here ).
1.CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

  1. Check for DTCs.

    OK:
    DTC is not output.


NG
GO TO CAN COMMUNICATION SYSTEM (Click here)
OK


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

  1. Disconnect the connectors from the power steering ECU.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E32-6 (IG) - A75-2 (PGND)
    		Ignition switch on (IG)
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A75-2 (PGND) - Body ground
    		Always
    		Below 1 Ω


B
REPAIR OR REPLACE HARNESS OR CONNECTOR
A


3.REPLACE POWER STEERING ECU

  1. Replace the power steering ECU (Click here).

  1. Check the P/S warning light condition.

    OK:
    P/S warning light operates normally.


NG
GO TO COMBINATION METER SYSTEM (Click here)
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)