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





INSEPCTION 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 Programming and Relearning after registration Programming and Relearning 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 Scan Tool Testing and Procedures.

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 How to Proceed with Troubleshooting

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 Service and Repair