TIRE PRESSURE WARNING SYSTEM, Diagnostic DTC:C2179/79

DTC Code DTC Name
C2179/79 Tire Pressure Monitor ECU Communication Stop

DESCRIPTION

The tire pressure warning ECU and receiver receives speed signals from the combination meter via CAN communication.

DTC No. DTC Detection Condition Trouble Area
C2179/79 Tire pressure warning ECU and receiver communication disruption

  • CAN communication system

  • Vehicle speed signal circuit

  • Combination meter

  • Tire pressure warning ECU and receiver

INSPECTION PROCEDURE

Note


  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the GTS and write them down before removal.

  • It is necessary to perform initialization Click here after registration Click here of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG) and turn the GTS on.

    4. Enter the following menus: "CAN Bus Check" from the "System Select" screen.

    5. Check the CAN communication system Click here.

      OK
      The CAN communication system is normal.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. CHECK VEHICLE SPEED SIGNAL (DATA LIST)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

    6. Check that the values indicated on the GTS and on the combination meter are the same.

      Tire Pressure Monitor
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Vehicle Speed

      Vehicle speed reading/

      min.: 0 km/h (0 mph), max.: 255 km/h (158 mph)

      		 Actual vehicle speed Speed indicated on the combination meter
      OK
      The vehicle speed displayed on the GTS changes depending on the actual vehicle speed.

    NG

    GO TO METER / GAUGE SYSTEM Click here

    OK

  3. CHECK TEST MODE DTC (C2191/91)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / Tire Pressure Monitor / Utility / Signal Check.

    6. Perform the test mode inspection Click here.

      Result
      Result Proceed to
      DTCs C2191/91 is cleared A
      DTC C2191/91 is not cleared B

    B

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here