Tire Pressure Warning Light Circuit

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: Tire Pressure Warning Light Circuit

Tire Pressure Warning Light Circuit

DESCRIPTION

If the tire pressure warning ECU and receiver detects trouble, the tire pressure warning light comes on and tire pressure warning system is cancelled at the same time. At this time, the tire pressure warning ECU and receiver records a DTC in the memory.
Connect terminals TC and CG of the DLC3 to make the tire pressure warning light blink and output the DTC.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE:
It is necessary to perform initialization Initialization after registration Registration of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU and/or one of the valve and transmitters have been replaced.
HINT:
This procedure must be performed according to the PROBLEM SYMPTOMS TABLE.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Check the condition of the tire pressure warning light by operating the Techstream. Enter the following menus: Body / Combination Meter / Active Test.

Combination Meter:





OK:
The tire pressure warning light is normal.
NG -- REPLACE COMBINATION METER
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR




(a) Disconnected combination meter J34 connector and tire pressure warning ECU and receiver J49 connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE