Tire Pressure Warning Reset Switch Circuit

TIRE PRESSURE MONITORING: 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 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 after the ECU and/or the tire pressure warning valve and transmitter 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 (signal check mode) Test Mode Procedure.

OK:

Reset switch on
Tire pressure warning light illuminates.

Reset switch off
Tire pressure warning light blinks.

NG -- INSPECT TIRE PRESSURE WARNING RESET SWITCH

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

2. INSPECT TIRE PRESSURE WARNING RESET SWITCH

(a) Remove the tire pressure warning reset switch Removal.





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

Standard Resistance:





Text in Illustration





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

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

(a) Disconnect the C41 reset switch connector.

(b) Disconnect the C40 ECU 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 Removal