Inspection Procedure
WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK BRAKE WARNING LIGHT
- Check that the brake warning light comes on when the parking brake is applied and goes off when it is released.
OK: The brake warning light operates as specified above.
OK: Go to step 3
NG: Go to Next Step
- Check that the brake warning light comes on when the parking brake is applied and goes off when it is released.
- INSPECT PARKING BRAKE SWITCH
- Disconnect the P4 switch connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
PARKING BRAKE SWITCHTester Connection Switch Condition Specified Condition P4-1 - Switch body ON (When shaft is not pressed) Below 1 Ω P4-1 - Switch body OFF (When shaft is pressed) 10 kΩ or higher NG: REPLACE PARKING BRAKE SWITCH
OK: Go to Next Step
- CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - PARKING BRAKE SWITCH)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the M21 display connector.
- Disconnect the P4 switch connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
MULTI-DISPLAY - PARKING BRAKE SWITCHTester Connection Condition Specified Condition M21-8 (PKB) - P4-1 Always Below 1 Ω M21-8 (PKB) - Body ground Always 10 kΩ or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE