TIRE PRESSURE WARNING SYSTEM > DIAGNOSIS SYSTEM

for Preparation Click here



CHECK BATTERY VOLTAGE
If the voltage is below 11 V, recharge the battery before proceeding.
C110633E01

Battery voltage:
11 to 14 V


CHECK DLC3
The vehicle's tire pressure monitor ECU uses ISO 9141-2 for communication. The terminal arrangement of DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
Verify the conditions listed in the table below:

Terminal No.
Disc.
Connection / Voltage or Resistance
Condition
7
SIL
Bus + Line / Pulse generation
During transmission
4
CG
Chassis Ground to Body Ground / 1 Ω or less
Always
16
BAT
Battery Positive to Body Ground / 10 to 14 V
Always

HINT:
If the intelligent tester display shows a communication error message when the cable of the intelligent tester is connected to DLC3, the engine switch is turned on (IG) and the tester is in operation, there is a problem on the vehicle side or tester side.
  1. If communication is normal when the tester is connected to another vehicle, inspect DLC3 on the original vehicle.
  2. If communication is still not possible when the tool is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester operator's manual.


DIAGNOSIS SYSTEM


    C107238

  1. Warning light and indicator

    1. When there is a problem with the tire pressure warning system, the "CHECK SYSTEM" displayed on the multi-display and the tire pressure warning light blinks at 0.5 second intervals.

      NOTICE:
      When the malfunction has been corrected, the tire pressure warning light does not come on and the "CHECK SYSTEM" does not display.

  2. DTCs (Normal mode)

    1. DTCs are memorized in the tire pressure monitor ECU and read by the blinks of the tire pressure warning light or using the intelligent tester (Click here).

  3. Test mode

    1. By switching from normal mode into test mode (input signal check), you can inspect the tire pressure monitor receiver assembly, each tire pressure monitor valve sub-assembly and vehicle speed sensor (Click here).


CHECK WARNING LIGHT


    C107266

  1. Turn the engine switch on (IG).

  2. 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.
    Trouble Area
    		See procedure
    Tire pressure warning light circuit
    		 Click here


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).


Immediately after turning the engine switch on (IG)
Always
Warning light output pattern
Warning indicator output pattern
Comes on for 3 sec.
Goes off
Comes on
Blink (*1)
Blinks (*2)
Blinks (*3)
Displayed on multi-information display
Normal
○
○




-
Low tire pressure
○

○



LOW TIRE
System fail
○


○


CHECK SYSTEM
Test mode
○



○

TEST MODE
Initialization
○




○
PRESSURE INITIAL (*4)
ECU connector poorly connected


○



-
TC ground
○





DIAG TIRE OK (*5)


  1. C110634E01
    *1: Comes on and goes off repeatedly at 0.5 second intervals.

  2. C110635E01
    *2: Comes on and goes off repeatedly at 0.125 second intervals.

  3. C110636E01
    *3: Blinks 3 times (1 second on, 1 second off).
  4. *4: This message is displayed only when the engine is on.
  5. *5: When there is no DTC, "OK" is displayed; when there is DTC, the DTC is displayed.