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 ECU detects trouble, the tire pressure warning light blinks (illuminates after blinking for 1 minute) and tire pressure monitor is canceled at the same time. At this time, the ECU 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.

INSPECTION PROCEDURE
NOTICE:
- When replacing the tire pressure warning ECU, read the IDs stored in the old ECU using 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 has been replaced.

PROCEDURE

1. CHECK CAN COMMUNICATION LINE
(a) Turn the power switch off.
(b) Connect Techstream to the DLC3.
(c) Turn the power switch on (IG) and press Techstream main switch on.
(d) Enter the following menus:
(1) Select: "Bus Check" from the "System Select" / "Communication Malfunction DTC" from the "Bus Check" screen
(e) Check the CAN communication system Diagnosis System.
NG -- GO TO CAN COMMUNICATION SYSTEM
OK -- Continue to next step.
2. CHECK DTC (CAN COMMUNICATION SYSTEM)
(a) Turn the power switch off.
(b) Connect Techstream to the DLC3.
(c) Turn the power switch on (IG) and press Techstream main switch on.
(d) Check for DTC.
Result:






B -- GO TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.
3. CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST)
(a) Turn the power switch off.
(b) Connect Techstream to the DLC3.
(c) Turn the power switch on (IG) and press Techstream main switch on.
(d) Enter the following menus:
(1) Select: Body Electrical / Combination Meter / Active Test /
(e) Check the condition of the tire pressure warning light by operating Techstream.

Combination Meter





OK:
The warning light turns on when operating Techstream.
NG -- GO TO METER / GAUGE SYSTEM
OK -- REPLACE TIRE PRESSURE WARNING ECU