Diagnosis System (to 12/2010)

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: DIAGNOSIS SYSTEM

1. CHECK BATTERY VOLTAGE

(a) Measure the voltage of the battery.

Standard voltage:

11 to 14 V

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

2. DESCRIPTION

(a) Each system data and the Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use Techstream to check for malfunctions and perform repairs.

3. 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, any other switches or the doors.

(b) If the result is not as specified, 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 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's instruction manual.

4. 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 corrected, the tire pressure warning light does not comes 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 DTC Check / Clear (to 12/2010).

(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 revolution signal and vehicle speed sensor Test Mode Procedure (to 12/2010).

5. CHECK WARNING LIGHT

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





(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.





6. TIRE PRESSURE WARNING LIGHT CHART

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





* *1: Comes on and goes off repeatedly at 0.5-second intervals, and comes 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: When determining if there is a short circuit (10 seconds), the light is off. Then it blinks at 0.125-second intervals, and comes on after 1 minute.