Tire Pressure Warning System Tire Pressure Warning Light Circuit

Suspension. Corolla. Zre142 Aze141
Tire Pressure Monitoring. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST)

CHECK HARNESS AND CONNECTOR (COMBINATION METER - TIRE PRESSURE WARNING ECU)

TIRE PRESSURE WARNING SYSTEM - Tire Pressure Warning Light Circuit


DESCRIPTION

If the tire pressure warning ECU detects any trouble, the tire pressure warning light blinks (stays on after blinking for 1 minute) and tire pressure monitor is cancelled at the same time. At this time, the ECU records a DTC in the memory.
Connecting terminals TC and CG of the DLC3 makes the tire pressure warning light blink to output DTCs.

WIRING DIAGRAM


Corolla. Zre142 Aze141.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, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.
  1. It is necessary to perform initialization (COROLLA_ZRE142 RM000000XMZ07PX.html) after registration (COROLLA_ZRE142 RM000000XN108OX.html) of the transmitter IDs into the tire pressure warning ECU if the ECU has been replaced.
1.CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST)

  1. Turn the ignition switch off.

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

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

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

    Combination Meter
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Indicat. Tire Pressure Warning System
    		Tire pressure warning light
    		Tire pressure warning light is OFF or ON
    		Confirm that the vehicle is stopped, engine idling
    OK:
    The warning light turns on when operating the Techstream.


NG
GO TO METER / GAUGE SYSTEM (COROLLA_ZRE142 RM0000012G10BVX.html)
OK


2.CHECK HARNESS AND CONNECTOR (COMBINATION METER - TIRE PRESSURE WARNING ECU)


    Corolla. Zre142 Aze141.Tire Pressure Monitoring.Tire Pressure Warning System.Tire Pressure Warning System Tire Pressure Warning Light Circuit

  1. Disconnect the E46 combination meter connector.

  1. Disconnect the E94 tire pressure warning ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E46-7 (TIRE) - E94-5 (IND)
    		Always
    		Below 1 Ω
    E46-7 (TIRE) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TIRE PRESSURE WARNING ECU (COROLLA_ZRE142 RM0000024T8027X.html)