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 any trouble, the tire pressure warning light blinks (stays on after blinking for 1 minute) and tire pressure monitor is cancelled at the same time. At this time, the ECU records a DTC in the memory.

Connecting terminals TC and CG of the DLC3 makes the tire pressure warning light blink to output DTCs.

INSPECTION PROCEDURE

NOTICE:
* When replacing the tire pressure warning ECU, read the IDs stored in the old ECU using the Techstream and write them down before removal.
* It is necessary to perform registration Programming and Relearning 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 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:

Select: "Bus Check" from the "System Select" / "Communication Malfunction DTC" from the "Bus Check" screen

(e) Check the CAN communication system Diagnosis System for w/ Smart Key System, Diagnosis System for w/o Smart Key System).

Result

C -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting

B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

3. 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 or off according to the Techstream operation.

NG -- GO TO COMBINATION METER How to Proceed With Troubleshooting

OK -- REPLACE TIRE PRESSURE WARNING ECU Removal