Diagnosis System

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: DIAGNOSIS SYSTEM

1. CHECK BATTERY VOLTAGE

Battery voltage:

11 to 14 V

If the voltage is below 11 V, recharge the battery before proceeding.

2. CHECK DLC3

(a) The tire pressure warning ECU and receiver uses ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.









NOTICE:
*: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, or any other switches or the doors.

(b) If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.

HINT
Connect the Techstream to the DLC3, turn the engine switch on (IG) and attempt to use the Techstream. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the Techstream.

* If communication is normal when the Techstream is connected to another vehicle, inspect the DLC3 of the original vehicle.
* If communication is still not possible when the Techstream is connected to another vehicle, the problem may be in the Techstream itself. Consult the Service Department listed in the Techstream instruction manual.
3. DIAGNOSIS SYSTEM

(a) Warning light





(1) When there is a problem with the tire pressure warning system, the tire pressure warning light blinks at 0.5 second intervals and comes on after 1 minute.

NOTICE:
When the malfunction has been corrected, the tire pressure warning light does not come on.

(b) DTCs (Normal mode)

(1) DTCs are memorized in the tire pressure warning ECU and receiver and read by the blinks of the tire pressure warning light or by using the Techstream Reading and Clearing Diagnostic Trouble Codes.

(c) Test mode

(1) By switching from the normal mode into test mode (input signal check), you can inspect the tire pressure warning ECU and receiver, each tire pressure warning valve and transmitter, engine speed signal, tire pressure warning select switch signal and vehicle speed sensor C2191.

4. CHECK WARNING LIGHT

(a) Turn the engine switch on (IG).





(b) Check that the tire pressure warning light comes on for 3 seconds.

If the warning light check result is not normal, proceed to the troubleshooting for the tire pressure warning light circuit.





5. TIRE PRESSURE WARNING LIGHT AND INDICATOR CHART

HINT
The table below indicates the state of the tire pressure warning light and indicator after the engine switch is turned on (IG).





* *1: Comes on and goes off repeatedly at 0.5 second intervals.





HINT
The tire pressure warning light blinks for approximately 1 minute and then remains on.

* *2: Comes on and goes off repeatedly at 0.125 second intervals.





* *3: Blinks 3 times (1 second on, 1 second off).





* *4: This message is displayed only when the engine is on.

* *5: When there is no DTC, "OK" is displayed; when there is DTC, the DTC is displayed.