Tire Pressure Warning Light Circuit

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: Tire Pressure Warning Light Circuit
- Tire Pressure Warning Light Circuit

DESCRIPTION

If the tire pressure warning ECU detects a disconnected connector or an open circuit between the tire pressure warning ECU and combination meter, the tire pressure warning light turns off 10 seconds after the ignition switch is turned ON, blinks for 1 minute, and then remains on.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using a Techstream and write them down before removal.
* It is necessary to perform initialization Initialization after registration Registration of the transmitter IDs into the tire pressure warning ECU after the ECU has been replaced.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (COMBINATION METER)

(a) Turn the ignition switch off.

(b) Connect a Techstream to the DLC3.

(c) Turn the ignition switch to ON and the tester on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test /

(e) Check the condition of the tire pressure warning light by operating the tester.

Combination Meter





OK:

The warning light turns on when operating the tester.

NG -- REPLACE COMBINATION METER Removal
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECU AND BODY GROUND)

(a) Disconnect the F26 ECU connector.





(b) Disconnect the F2 meter connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures