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.





2. CHECK DLC3
(a) The ECU uses the 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 ignition switch, or any other switches or the doors.

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

HINT: Connect the cable of the intelligent tester to the DLC3, turn the ignition switch ON and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.
- If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
- If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.





3. DIAGNOSIS SYSTEM
(a) Warning light
(1) When there is a problem in the tire pressure warning system, the tire pressure warning light blinks at 0.5 second intervals, and turns on after 1 minute.

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

(b) Normal mode
(1) DTCs are stored in the tire pressure warning ECU and can be read by observing the blinking patterns of the tire pressure warning light or by using the intelligent tester.
(c) Test mode
(1) By switching from normal mode to test mode (signal check), the tire pressure warning receiver, tire pressure warning antenna and receiver, each tire pressure warning valve and transmitter and vehicle speed sensor can be inspected.





4. CHECK WARNING LIGHT
(a) Turn the ignition switch to the ON position.
(b) Check that the tire pressure warning light comes on for 3 seconds. If the warning light does not come on for 3 seconds, troubleshoot the tire pressure warning light circuit.





5. TIRE PRESSURE WARNING LIGHT CHART

HINT: The table below indicates the state of the tire pressure warning light after the ignition switch is turned on.

Part 1:

Part 2:

*1: Turns on and goes off repeatedly at 0.5 seconds intervals, and turns on after 1 minute.





*2: Blinks at 0.25 seconds intervals.





*3: Blinks at 0.125 seconds intervals.





*4: When determining if there is a short circuit (10 seconds), light is off. Then it blinks at 0.5 second intervals, and turns on after 1 minute.