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 power switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG) 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
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 the Techstream to the DLC3.
(c) Turn the power switch on (IG) and turn the Techstream on.
(d) Check for DTCs.
Result:
B -- GO TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.
3. PERFORM ACTIVE TEST USING TECHSTREAM (COMBINATION METER)
(a) Turn the power switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG) 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
OK -- REPLACE TIRE PRESSURE WARNING ECU