Power Tilt And Power Telescopic Steering Column System Ig Power Source Circuit

Steering. Lexus Is250, Is220D. Gse20 Ale20
Steering Column. Lexus Is250, Is220D. Gse20 Ale20

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 - MAIN BODY ECU RH)

POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM - 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 Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Power Tilt And Power Telescopic Steering Column System Ig Power Source Circuit


INSPECTION PROCEDURE

1.INSPECT FUSE (ECU-IG RH)

  1. Remove the ECU-IG RH fuse from the main body ECU RH (cowl side J/B RH).

  1. Measure the resistance of the ECU-IG RH fuse.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


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


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Power Tilt And Power Telescopic Steering Column System Ig Power Source Circuit

  1. Disconnect the J28 connector from the multiplex tilt & telescopic ECU.

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

    Standard voltage:
    Tester connection
    (Terminal No.)
    		Condition
    		Specified value
    IG (J28-8) - GND (J28-11)
    		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 Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Power Tilt And Power Telescopic Steering Column System Ig Power Source Circuit

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

    Standard resistance:
    Tester connection
    (Terminal No.)
    		Condition
    		Specified value
    GND (J28-11) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - MAIN BODY ECU RH)


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System.Power Tilt And Power Telescopic Steering Column System Ig Power Source Circuit

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

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


OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - MAIN BODY ECU RH)
NG

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