Tire Pressure Warning Reset Switch Circuit

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

DESCRIPTION

During initialization, the tire pressure warning ECU receives the signal from the tire pressure warning reset switch. If the ECU receives the signal, the tire pressure warning light blinks 3 times (1 second on, 1 second off).

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When replacing the tire pressure warning ECU, read the transmitter IDs stored in the ECU using the Techstream and note them down before removal.
* It is necessary to perform the initialization Initialization after the registration Registration of the transmitter IDs into the tire pressure warning ECU if the ECU and/or one of the valve and transmitters have been replaced.

PROCEDURE

1. CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION

(a) Perform the tire pressure warning reset switch test in TEST MODE PROCEDURE Test Mode Procedure.

OK:

Reset switch ON
Tire pressure warning light turns on.

Reset switch OFF
Tire pressure warning light blinks.

NG -- INSPECT TIRE PRESSURE WARNING RESET SWITCH

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

2. INSPECT TIRE PRESSURE WARNING RESET SWITCH





(a) Remove the tire pressure warning reset switch.

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

Standard resistance:





NG -- REPLACE TIRE PRESSURE WARNING RESET SWITCH
OK -- Continue to next step.

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





(a) Disconnect the K15 reset switch connector.

(b) Disconnect the K45 ECU connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE TIRE PRESSURE WARNING ECU Replacement