Lexus ES: On-vehicle Inspection

Lexus ES (XZ10) 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 A80 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
1: for HV Model 2: for Gasoline Model
A80-7 (B) - A80-2 (GND)	Always	11 to 14 V
A80-6 (B) - A80-2 (GND)	Power switch on (IG)*1	11 to 14 V
A80-6 (B) - A80-2 (GND)	Engine switch on (IG)*2	11 to 14 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
A80-2 (GND) - Body ground	Always	Below 1 Ω

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
1: for HV Model 2: for Gasoline Model
A80- 1 (OUT) - A80-2 (GND)	Power switch off, brake pedal not depressed*1	1.5 V or less
A80- 1 (OUT) - A80-2 (GND)	Engine switch off, brake pedal not depressed*2	1.5 V or less
A80- 1 (OUT) - A80- 2 (GND)	Power switch off, brake pedal depressed*1	11 to 14 V
A80- 1 (OUT) - A80- 2 (GND)	Engine switch off, brake pedal depressed*2	11 to 14 V
A80-3 (L) - A80-2 (GND)	Power switch off, brake pedal not depressed*1	1.5 V or less
A80-3 (L) - A80-2 (GND)	Engine switch off, brake pedal not depressed*2	1.5 V or less
A80-3 (L) - A80-2 (GND)	Power switch off, brake pedal depressed*1	11 to 14 V
A80-3 (L) - A80-2 (GND)	Engine switch off, brake pedal depressed*2	11 to 14 V
A80-4 (ACC) - A80-2 (GND)	Always	11 to 14 V
A80-5 (L) - A80-2 (GND)	Power switch on (IG), brake pedal not depressed*1	7.5 to 14 V
A80-5 (L) - A80-2 (GND)	Engine switch on (IG), brake pedal not depressed*2	7.5 to 14 V
A80-5 (L) - A80-2 (GND)	Power switch on (IG), brake pedal depressed*1	0 to 1.5 V
A80-5 (L) - A80-2 (GND)	Engine switch on (IG), brake pedal depressed*2	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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Lexus ES: On-vehicle Inspection

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