Lexus NX: On-vehicle Inspection

Lexus NX Service Manual / Vehicle Exterior / Lighting (ext) / Stop Light Switch / On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT STOP LIGHT SWITCH ASSEMBLY

(a) Disconnect the stop light switch assembly connector.

*a	Front view of wire harness connector (to Stop Light Switch Assembly)

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
A1-1 (B) - A1-3 (GND)	Always	11 to 14 V
A1-5 (B) - A1-3 (GND)	Always	11 to 14 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
A1-3 (GND) - Body ground	Always	Below 1 Ω

If the result is not as specified, repair or replace the wire harness or connector.

(d) w/o Dynamic Radar Cruise Control System:

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A1-2 (L) - A1-3 (GND)	Brake pedal not depressed	0 to 1.5 V
A1-2 (L) - A1-3 (GND)	Brake pedal depressed	7.5 to 14 V
A1-4 (L) - A1-3 (GND)	Brake pedal not depressed	7.5 to 14 V
A1-4 (L) - A1-3 (GND)	Brake pedal depressed	0 to 1.5 V

If the result is not as specified, replace the stop light switch assembly.

*a	Component with harness connected (Stop Light Switch Assembly)

(e) w/ Dynamic Radar Cruise Control System:

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A1-2 (L) - A1-3 (GND)	Power switch off, brake pedal not depressed	0 to 1.5 V
A1-2 (L) - A1-3 (GND)	Power switch off, brake pedal depressed	7.5 to 14 V
A1-4 (L) - A1-3 (GND)	Power switch on (IG), brake pedal not depressed	7.5 to 14 V
A1-4 (L) - A1-3 (GND)	Power switch on (IG), brake pedal depressed	0 to 1.5 V

If the result is not as specified, replace the stop light switch assembly.

*a	Component with harness connected (Stop Light Switch Assembly)

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Components

COMPONENTS ILLUSTRATION *1 OUTER MIRROR LH - -

Software Incompatibility with Body Control Module Not Programmed (U032251)

DESCRIPTION The forward recognition camera receives vehicle specification information from the main body ECU (multiplex network body ECU) via the CAN communication line. When the forward recognition camera is unable to determine the vehicle information from the vehicle specification information sent

Lexus NX: On-vehicle Inspection

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Removal

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Mirror (ext)

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Components

Software Incompatibility with Body Control Module Not Programmed (U032251)