Lexus ES: 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. |
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(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 | .gif) | REPLACE HEATED STEERING WHEEL CONTROLLER (STEERING VIBRATION ECU) |
| NG | | REPLACE STEERING WHEEL ASSEMBLY |
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Precaution
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Inspection
INSPECTION PROCEDURE 1. INSPECT TILT AND TELESCOPIC SWITCH (a) Remove the tilt and telescopic switch. Click here (b) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 (VC) - 3 (MSW) Tilt up
