Diagnosis System

TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: DIAGNOSIS SYSTEM

DIAGNOSIS SYSTEM

1. CHECK BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge the battery before proceeding to the next step.
2. CHECK DLC3





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





NOTE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition 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 cable to the DLC3, turn the ignition 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.
NOTE: 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 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 normal mode into test mode (input signal check), you can inspect the tire pressure warning antenna and receiver, each tire pressure warning valve and transmitter, engine speed signal and vehicle speed sensor Test Mode Procedure.
4. CHECK TIRE PRESSURE WARNING LIGHT





(a) Turn the ignition switch to ON.

(b) Check that the tire pressure warning light comes on for 3 seconds.
If the warning check result is not normal, proceed to the troubleshooting for the tire pressure warning light circuit Tire Pressure Warning Light Circuit.
5. TIRE PRESSURE WARNING LIGHT CHART
HINT: The table below indicates the tire pressure warning system status according to the tire pressure warning light after the ignition switch is turned to ON.





- *1: Comes on and goes off repeatedly at 0.5 second intervals, and stays on after 1 minute.




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




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




- *4: Comes on and goes off repeatedly at 0.25 second intervals.




- *5: If it is determined that there is a short circuit, the light will remain off for 10 seconds. It will then blink at 0.5 second intervals and stay on after 1 minute.