Tire Pressure Warning System Tire Pressure Warning Light Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECU)

CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST)

TIRE PRESSURE WARNING SYSTEM - Tire Pressure Warning Light Circuit


DESCRIPTION

If the tire pressure warning ECU and receiver detects a disconnected connector or an open circuit between the tire pressure warning ECU and receiver and combination meter assembly, the tire pressure warning light blinks for 1 minute, and then remains on after the ignition switch ON.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Tire Pressure Monitoring.Tire Pressure Warning System.Tire Pressure Warning System Tire Pressure Warning Light Circuit


INSPECTION PROCEDURE

NOTICE:
  1. When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the GTS and write them down before removal.
  2. It is necessary to perform initialization (LandCruiser RM000000XMZ0AOX.html) after registration (LandCruiser RM000000XN10DCX.html) of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.
1.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECU)

  1. Disconnect the tire pressure warning ECU and receiver R41 connector.

  1. Disconnect the combination meter assembly G7 connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    R41-5 (IND) - G7-16 (TIRE)
    		Always
    		Below 1 Ω
    R41-5 (IND) or G7-16 (TIRE) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST)

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch ON.

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Combination Meter / Active Test.

  1. Check the condition of the tire pressure warning light by using the GTS.

    Combination Meter
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Indicat. Tire Pressure Warning System
    		Tire pressure warning light
    		OFF or ON
    		Confirm that the vehicle is stopped with the engine idling.
    OK:
    The tire pressure warning light turns on or off in accordance with the GTS operation.


NG
GO TO METER / GAUGE SYSTEM (LandCruiser RM000002Z4L055X.html)
OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER (LandCruiser RM000002L8501CX.html)