Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

NOTE: In case of using the hand-held tester, start the inspection from step 1 and in case of not using hand-held tester, start from step 2.

Connect OBD II scan tool or hand-held tester, and check stop light switch signal
PREPARATION:
1. Warm up the engine.
2. Turn the ignition switch off.
3. Connect the OBD II scan tool or hand-held tester to the DLC3.
4. Turn the ignition switch to the ON position.
5. Push the "ON" button of the OBD II scan tool or the hand-held tester.
6. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST".
7. According to the display on tester, read the "DATA LIST".
CHECK:

Read the stop light switch signal.

OK:

Fig 1: Stop Light Switch Signal Reference Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Check for intermittent problem ( HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
2. NG : Go to next step
Check stop light switch (See INSPECTION ).
1. NG: Replace stop light switch.
2. OK: Go to next step

Check harness and connector between ECM and stop light switch.

PREPARATION:

Connect the stop lamp switch assy connector.

Fig 2: Identifying Stop Lamp Switch Assy Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK:

Measure the voltage according to the value(s) in the table below when the brake pedal is depressed and released.

OK:

ECM AND STOP LIGHT SWITCH CONNECTOR VOLTAGE SPECIFICATION

Condition	Tester Connection	Specified Condition
Brake pedal is depressed	E5-19(STP)-Body ground	10 to 14 V
Brake pedal is released	E5-19(STP)-Body ground	Below 1 V

NG: Repair or replace the harness or connector ( HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
OK: Replace the ECM.