Power Tilt And Power Telescopic Steering Column Ig Power Source Circuit

Steering. Lexus Gs430, Gs300. Uzs190 Grs190
Steering Column. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (ECU-IG RH)

INSPECT MULTIPLEX TILT & TELESCOPIC ECU (IG TERMINAL VOLTAGE)

CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BODY GROUND)

CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - COWL SIDE J/B RH)

POWER TILT AND POWER TELESCOPIC STEERING COLUMN - IG Power Source Circuit


DESCRIPTION

When the engine switch is turned on (IG), the IG power source circuit supplies positive voltage to the multiplex tilt & telescopic ECU.
The multiplex tilt & telescopic ECU also receives engine switch signals via this circuit.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System.Power Tilt And Power Telescopic Steering Column Ig Power Source Circuit


INSPECTION PROCEDURE

1.INSPECT FUSE (ECU-IG RH)

  1. Remove the ECU-IG RH fuse from the cowl side J/B RH.

  1. Check the continuity of the ECU-IG RH fuse.

    OK:
    Continuity


NG
REPLACE FUSE
OK


2.INSPECT MULTIPLEX TILT & TELESCOPIC ECU (IG TERMINAL VOLTAGE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System.Power Tilt And Power Telescopic Steering Column Ig Power Source Circuit

  1. Disconnect the L27 connector from the multiplex tilt & telescopic ECU.

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

    Voltage:
    Tester connection
    (Terminal No.)
    		Condition
    		Specified value
    IG (L27-8) - GND (L27-11)
    		Engine switch on (IG)
    		10 to 14 V


OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG


3.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BODY GROUND)


    Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System.Power Tilt And Power Telescopic Steering Column Ig Power Source Circuit

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

    Resistance:
    Tester connection
    (Terminal No.)
    		Condition
    		Specified value
    GND (L27-11) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - COWL SIDE J/B RH)


    Lexus Gs430, Gs300. Uzs190 Grs190.Steering Column.Steering System.Power Tilt And Power Telescopic Steering Column Ig Power Source Circuit

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

    Voltage:
    Tester condition
    		Condition
    		Specified value
    DA-1 - Body ground
    		Engine switch on (IG)
    		10 to 14 V


OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - COWL SIDE J/B RH)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (COWL SIDE J/B RH - BATTERY)