Tire Pressure Warning Light Circuit

TIRE PRESSURE MONITORING: 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. Connecting terminals TC and CG of the DLC3 makes the tire pressure warning light blink and outputs the DTC.

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 tire pressure warning valve and transmitter has been replaced.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (COMBINATION METER)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON and turn the Techstream 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 Techstream.

Combination Meter





OK:

The warning light turns on when operating the Techstream.

NG -- GO TO METER / GAUGE SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

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

(a) Disconnect the H40 ECU connector.

(b) Disconnect the H37 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 -- CHECK ECU POWER SOURCE CIRCUIT ECU Power Source Circuit