TIRE PRESSURE WARNING SYSTEM Tire Pressure Warning Light Circuit
| DTC Code | DTC Name |
|---|---|
| Tire Pressure Warning Light Circuit |
DESCRIPTION
If the tire pressure warning ECU and receiver detects any problems, the tire pressure warning light blinks (stays on after blinking for 1 minute) and tire pressure monitoring is canceled at the same time. At this time, the ECU stores a DTC in memory.
Connecting terminals TC and CG of the DLC3 makes the tire pressure warning light blink to output DTCs.
The tire pressure warning ECU and receiver sends the tire pressure warning light illumination request signal to the main body ECU (multiplex network body ECU) via a direct line. The main body ECU (multiplex network body ECU) then sends the signal to the combination meter assembly via CAN communication.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the GTS and write them down before removal.
It is necessary to perform initialization (Click here) after registration (Click here) of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.
PROCEDURE
CHECK CAN COMMUNICATION SYSTEM
Check the CAN communication system.
for LHD with Central Gateway ECU:Click here
for RHD with Central Gateway ECU:Click hereClick here
for LHD without Central Gateway ECU:Click here
for RHD without Central Gateway ECU:Click here
CAN Bus Check
OK
The CAN communication system is normal.
Result
Proceed to
OK
NG
NG GO TO CAN COMMUNICATION SYSTEM
for LHD with Central Gateway ECU:Click here
for RHD with Central Gateway ECU:Click here
for LHD without Central Gateway ECU:Click here
for RHD without Central Gateway ECU:Click here
CHECK DTC OUTPUT (B1247)
Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
Turn the ignition switch off.
Turn the ignition switch to ON.
Check for DTCs.
Body Electrical > Main Body > Trouble Codes
OK
DTC B1247 is not output.
Result
Proceed to
OK
NG
CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST)
Turn the ignition switch off.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Body Electrical / Combination Meter / Active Test.
Check the condition of the tire pressure warning light by using the GTS.
Body Electrical > Combination Meter > Active Test
Tester Display
Measurement Item
Control Range
Diagnostic Note
Indicat. Tire Pressure Warning System
Tire pressure warning light
OFF or ON
-
Body Electrical > Combination Meter > Active Test
Tester Display
Indicat. Tire Pressure Warning System
OK
The tire pressure warning light turns on or off in accordance with the GTS operation.
Result
Proceed to
OK
NG