Lexus NX: Steering Heater Switch

Lexus NX Service Manual / Steering / Steering Column / Steering Heater Switch

Inspection

INSPECTION

PROCEDURE

1. REMOVE NO. 2 COMBINATION SWITCH ASSEMBLY

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2. INSPECT NO. 2 COMBINATION SWITCH ASSEMBLY

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

Standard Voltage:

Tester Connection (Positive (+) Tester Probe - Negative (-) Tester Probe)

Switch Condition

Specified Condition

7 (IG1) - 20 (IND)

Always

Below 1.25 V

19 (ECU) - 20 (IND)

Steering heater switch is pushed

Below 1.25 V

HINT:

As the circuit has a diode, perform the measurement in diode test mode, and do not mistake the polarity.

*a

Component without harness connected

(No. 2 Combination Switch Assembly (Steering Heater Switch))

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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

7 (IG1) - 19 (ECU)

Steering heater switch is pushed

Below 1 Ω

Steering heater switch is not pushed

10 kΩ or higher

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

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

3. INSTALL NO. 2 COMBINATION SWITCH ASSEMBLY

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