Tire Pressure Warning System Tire Pressure Warning Light Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DIAGNOSTIC CODE OUTPUT

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (TIRE PRESSURE WARNING LIGHT)

TIRE PRESSURE WARNING SYSTEM - Tire Pressure Warning Light Circuit


DESCRIPTION

When the tire pressure decreases, the ECU sends the communication signal to the combination meter assembly through the BEAN, and it indicates the tire pressure warning light on the combination meter assembly.
The tire pressure warning light also comes on when the signal for the tire pressure warning light is cut off.
HINT:
Refer to the "TIRE PRESSURE WARNING LIGHT AND INDICATOR CHART" section of the "DIAGNOSIS SYSTEM" for checking the condition of the tire pressure warning light (Click here ).

WIRING DIAGRAM


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


INSPECTION PROCEDURE

1.CHECK DIAGNOSTIC CODE OUTPUT

  1. Check if the DTC is output in the multiplex communication system (Click here).

    Result:

    Condition
    		Proceed to
    B1247 is not output
    		A
    B1247 is output
    		B


B
REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A


2.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (TIRE PRESSURE WARNING LIGHT)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the intelligent tester main switch on.

  1. Select the ACTIVE TEST mode on the intelligent tester.

  1. Check the condition of the tire pressure warning light by operating the tester.

    Item
    		Vehicle Condition/Test Details
    		Diagnostic Note
    Indicat. Lamp Tire Press
    		Tire pressure warning light/On or OFF
    		ON: light comes on
    OFF: light goes off
    OK:
    The warning light comes on when operation the tester.


NG
REPLACE COMBINATION METER ASSEMBLY
OK

REPLACE TIRE PRESSURE MONITOR ECU