Lexus ES manuals

Lexus ES: Steering Wheel does not Heat Up When Heated Steering Wheel Switch is Pressed

Lexus ES (XZ10) Service Manual / Steering / Steering Column / Heated Steering Wheel System (for Gasoline Model) / Steering Wheel does not Heat Up When Heated Steering Wheel Switch is Pressed

DESCRIPTION

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

NOTICE:

The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

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PROCEDURE

1.

INSPECT STEERING WHEEL ASSEMBLY (THERMOSTAT, HEATER AND THERMISTOR)

(a) Disconnect the B heated steering wheel controller (steering vibration ECU) connector.

*a

Component without harness connected

(Steering Wheel Assembly)

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

Standard Resistance (for F SPORT Models):

Tester Connection

Condition

Specified Condition

B-1 (SH1) - B-4 (SH3)

20°C (68°F)

2.52 to 3.00 Ω

B-1 (SH1) - B-5 (SH2)

20°C (68°F)

2.52 to 3.00 Ω

B-2 (TH1) - B-3 (TH2)

10 to 30°C (50 to 86°F)

4.228 to 8.701 kΩ

Standard Resistance (except F SPORT Models):

Tester Connection

Condition

Specified Condition

B-1 (SH1) - B-4 (SH3)

20°C (68°F)

2.33 to 2.77 Ω

B-1 (SH1) - B-5 (SH2)

20°C (68°F)

2.33 to 2.77 Ω

B-2 (TH1) - B-3 (TH2)

10 to 30°C (50 to 86°F)

4.228 to 8.701 kΩ

OK

REPLACE HEATED STEERING WHEEL CONTROLLER (STEERING VIBRATION ECU)

NG

REPLACE STEERING WHEEL ASSEMBLY

READ NEXT:

 Heated Steering Wheel System (for Hv Model)

 Precaution

PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following s

 Parts Location

PARTS LOCATION ILLUSTRATION *1 SPIRAL CABLE SUB-ASSEMBLY *2 STEERING WHEEL HEATER SWITCH (REFRESHING SEAT SWITCH) *3 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-IG1 NO. 3 FUSE *4

SEE MORE:

 GVIF Disconnected (from EMV/MM Integrated Device to Multi Display) (B1575)

DESCRIPTION The radio receiver assembly and multi-display assembly are connected via video signal (digital) lines. This DTC is stored when a video signal (digital) line is disconnected. DTC No. Detection Item DTC Detection Condition Trouble Area B1575 GVIF Disconnected (from EMV/MM In

 Removal

REMOVAL PROCEDURE 1. REMOVE FRONT WHEEL LH Click here 2. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH HINT: Use the same procedure as for the RH side. Click here 3. REMOVE REAR FENDER SPLASH SHIELD SUB-ASSEMBLY LH HINT: Use the same procedure as for the RH side. Click here 4. REMOVE PIN HOLD CL

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