Tire Pressure Warning System Tire Pressure Warning Reset Switch Circuit

Suspension & Axle. Lexus Gs430, Gs300. Uzs190 Grs190
Tire And Wheel. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION

INSPECT TIRE PRESSURE WARNING RESET SWITCH

CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING RESET SWITCH-TIRE PRESSURE MONITOR ECU)

TIRE PRESSURE WARNING SYSTEM - Tire Pressure Warning Reset Switch Circuit


DESCRIPTION

Receiving the signal from the tire pressure warning reset switch, the tire pressure monitor ECU indicates the initialization of the pressure warning system.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Tire And Wheel.Tire And Wheel System.Tire Pressure Warning System Tire Pressure Warning Reset Switch Circuit


INSPECTION PROCEDURE

NOTICE:
It is necessary to register an ID code after replacing the tire pressure monitor valve sub-assembly and/or the tire pressure monitor ECU (Click here).
1.CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION

  1. Perform the tire pressure warning reset switch test in TEST MODE PROCEDURE (Click here).

    OK:
    Reset switch ON:
    Tire pressure warning light comes on.
    Reset switch OFF:
    Tire pressure warning light blinks.


NG
Go to step 2
OK

END

2.INSPECT TIRE PRESSURE WARNING RESET SWITCH


    Lexus Gs430, Gs300. Uzs190 Grs190.Tire And Wheel.Tire And Wheel System.Tire Pressure Warning System Tire Pressure Warning Reset Switch Circuit

  1. Disconnect the tire pressure warning reset switch connector.

  1. Measure the resistance between terminals 1 and 2 of the tire pressure warning reset switch when the tire pressure warning switch is ON and OFF.

    OK:
    Switch Condition
    		Specified Condition
    ON
    		Below 1 Ω
    OFF
    		10 kΩ or higher


NG
REPLACE TIRE PRESSURE WARNING RESET SWITCH
OK


3.CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING RESET SWITCH-TIRE PRESSURE MONITOR ECU)


    Lexus Gs430, Gs300. Uzs190 Grs190.Tire And Wheel.Tire And Wheel System.Tire Pressure Warning System Tire Pressure Warning Reset Switch Circuit

  1. Disconnect the tire pressure warning reset switch K15 connector and tire pressure monitor ECU K45 connector.

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

    OK:
    Tester Connection
    		Specified Condition
    K45-2 (CALSW) - K15-1
    		Below 1 Ω
    K45-2 (CALSW) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TIRE PRESSURE MONITOR ECU