Lexus NX: 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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Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table.
Check each system by checking the suspec
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