DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK CAN COMMUNICATION LINE
CHECK TIRE PRESSURE WARNING LIGHT CONDITION
PERFORM INSPECTION CHECK NECESSARY FOR SYMPTOM
CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST)
CHECK IF TIRE PRESSURE WARNING ECU AND RECEIVER CONNECTOR IS SECURELY CONNECTED
CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER - BATTERY AND BODY GROUND)
TIRE PRESSURE WARNING SYSTEM - 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 monitoring is canceled at the same time. At this time, the ECU stores 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
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 () after registration () of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.
| 1.CHECK CAN COMMUNICATION LINE |
Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Enter the following menus: "CAN Bus Check" from the "System Select" screen.
Check the CAN communication system (for LHD: , for RHD: ).
- OK:
- The CAN communication system is normal.
- Result:
| Result | Proceed to |
| OK | A |
| NG (for LHD) | B |
| NG (for RHD) | C |
| | GO TO CAN COMMUNICATION SYSTEM ()
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| | GO TO CAN COMMUNICATION SYSTEM ()
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| 2.CHECK TIRE PRESSURE WARNING LIGHT CONDITION |
Check for tire pressure warning light condition.
- Result:
| Result | Proceed to |
| Tire pressure warning light does not illuminate despite tire pressure decreasing | A |
| Tire pressure warning light remains illuminated (goes off during initial check) | B |
| Tire pressure warning light remains illuminated (illuminates during initial check) | C |
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| | GO TO PROBLEM SYMPTOMS TABLE ()
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| 3.PERFORM INSPECTION CHECK NECESSARY FOR SYMPTOM |
- If the following checks in the Suspected Area column of the Problem Symptoms Table have not been performed, make sure to perform the following checks before proceeding ().
- If the items below are normal, proceed to the next step.
Initialization
Check Data List (ID Tire Inflation Pressure)
ID code check (Registration)
| 4.CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST) |
Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Enter the following menus: Body Electrical / Combination Meter / Active Test.
Check the condition of the tire pressure warning light by operating the GTS.
Combination Meter| Tester Display | Test Part | Control Range |
| Indicat. Tire Pressure Warning System | Tire Pressure Warning Light | OFF or ON |
- OK:
- The warning light turns on when operating the GTS.
| | GO TO METER / GAUGE SYSTEM ()
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| OK | |
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| REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER ()
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| 5.CHECK IF TIRE PRESSURE WARNING ECU AND RECEIVER CONNECTOR IS SECURELY CONNECTED |
Check if the tire pressure warning ECU and receiver connector is securely connected.
- OK:
- The connector is securely connected.
| | CONNECT CONNECTOR TO TIRE PRESSURE WARNING ECU AND RECEIVER CORRECTLY |
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| 6.CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER - BATTERY AND BODY GROUND) |
Disconnect the tire pressure warning ECU and receiver L60 connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
| L60-1 (IG1) - Body ground | Engine switch on (IG) | 10 to 16 V |
| Engine switch off | Below 1 V |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| L60-4 (GN1) - Body ground | Always | Below 1 Ω |
Text in Illustration| *a | Front view of wire harness connector
(to Tire Pressure Warning ECU and Receiver) |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER ()
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