Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Using 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 Techstream to the DLC3.
Turn the ignition switch ON and turn the tester ON.
Enter the following menus: Powertrain / Engine and ECT / Data List.
Follow the instructions on the tester and read the Data List.

ECM:

ECM DATA LIST REFERENCE

Tester Display	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 A3 stop light switch.

Fig 1: Identifying Stop Light Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the switch.

Standard resistance

RESISTANCE SPECIFICATION

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

NG: REPLACE STOP LIGHT SWITCH

OK: Go to Next Step

CHECK WIRE HARNESS (ECM - BATTERY)

Measure the voltage of the wire harness side connector.

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
A9-36 (STP) - Body ground	Brake pedal is depressed	10 to 14 V
A9-36 (STP) - Body ground	Brake pedal is released	Below 1 V

Fig 2: Identifying A9 Wire Harness Side Connector

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE ECM