Inspection Procedure

HINT:

Using the Techstream's Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to save time.

NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

Warm up the engine.
Turn the ignition switch off.
Connect the Techstream to the DLC3.
Turn the ignition switch to the ON position.
Turn the Techstream on.
Enter the following menus: Powertrain/Engine and ECT/Data List.
Follow the instructions on the Techstream and read the Data List.

DIAGNOSTIC NOTE

Item	Measurement Item/Range	Normal Condition	Diagnostic Note
Stop Light Switch	Stop light switch status/ON or OFF	Brake pedal is depressed ON Brake pedal is released: OFF	-

INSPECT STOP LIGHT SWITCH

Remove the S8 stop light switch.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Switch Condition	Specified Condition
1 - 2	Pin pushed (pedal released)	Below 1 Ω
1 - 2	Pin not pushed (pedal depressed)	10 kΩ or higher
3 - 4	Pin pushed (pedal released)	10 kΩ or higher
3 - 4	Pin not pushed (pedal depressed)	Below 1 Ω

Fig 1: Inspecting Stop Light Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Reinstall the stop light switch.

NG: REPLACE STOP LIGHT SWITCH (See REMOVAL )

OK: Go to Next Step

CHECK WIRE HARNESS (ECM - BATTERY)

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
E5-4 (STP) - Body ground	Brake pedal is depressed	10 to 14 V
E5-4 (STP) - Body ground	Brake pedal is released	Below 1 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM (See REMOVAL )

Fig 2: Identifying Brake Pedal Depressed And Released Position