Power Steering System (W/ Vsc) Power Steering Warning Light Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT CAN COMMUNICATION SYSTEM

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

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (METER/GAUGE SYSTEM)

POWER STEERING SYSTEM (w/ VSC) - Power Steering Warning Light Circuit


DESCRIPTION

The power steering ECU is connected to the combination meter via CAN communication. If the power steering ECU detects a malfunction, the power steering warning light comes on. At this time, the vehicle enters fail-safe mode.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Power Assist Systems.Power Steering System (W/ Vsc).Power Steering System (W/ Vsc) Power Steering Warning Light Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.INSPECT CAN COMMUNICATION SYSTEM

  1. Check for DTCs of the CAN communication system.
    for LHD with Entry and Start System:
    Refer to the following procedures (LandCruiser RM000000WIB0ECX.html).
    for LHD without Entry and Start System:
    Refer to the following procedures (LandCruiser RM000000WIB0EDX.html).
    for RHD with Entry and Start System:
    Refer to the following procedures (LandCruiser RM000000WIB0EEX.html).
    for RHD without Entry and Start System:
    Refer to the following procedures (LandCruiser RM000000WIB0EFX.html).

    Result
    Result
    		Proceed to
    DTC is not output.
    		A
    DTC is output.
    		for LHD with Entry and Start System
    		B
    for LHD without Entry and Start System
    		C
    for RHD with Entry and Start System
    		D
    for RHD without Entry and Start System
    		E


B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (LandCruiser RM000001RSO0C5X.html)

C
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (LandCruiser RM000001RSO0BYX.html)

D
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (LandCruiser RM000001RSO0BZX.html)

E
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (LandCruiser RM000001RSO0C0X.html)
A


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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Power Assist Systems.Power Steering System (W/ Vsc).Power Steering System (W/ Vsc) Power Steering Warning Light Circuit

  1. Disconnect the power steering ECU connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G46-5 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G46-3 (GND) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Power Steering ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (METER/GAUGE SYSTEM)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the intelligent tester on.

  1. Perform the Active Test of the combination meter using the intelligent tester (LandCruiser RM0000012G70JTX.html).

    Combination Meter
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    PPS Indicator
    		Power steering warning light
    		ON or OFF
    		Perform the test with the vehicle stopped and the engine idling.

  1. Check that the power steering warning light operates in accordance with the Active Test.

    HINT:
    Reconnect the connectors and restore the vehicle to its previous condition before checking the combination meter.
    OK:
    The power steering warning light turns on and off in accordance with the intelligent tester operation.


NG
INSPECT METER/GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (LandCruiser RM000002Z4L055X.html)
OK

REPLACE POWER STEERING ECU ASSEMBLY (LandCruiser RM000003FC0019X.html)