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 and receiver 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 and receiver, read the IDs stored in the old ECU using the 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 and receiver after the ECU has 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 comes on.
Reset switch OFF:
Tire pressure warning light blinks.
NG -- INSPECT TIRE PRESSURE WARNING RESET SWITCH
OK -- USE SIMULATION METHOD TO CHECK
2. INSPECT TIRE PRESSURE WARNING RESET SWITCH




(a) Remove the 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 - ECU AND RECEIVER, BODY GROUND)
(a) Disconnect the T31 switch connector.
(b) Disconnect the T9 ECU and receiver connector.




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






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER