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TIRE PRESSURE WARNING SYSTEM, Diagnostic DTC:C2191/91

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DTC Code DTC Name
C2191/91 Vehicle Speed Signal Error (Test Mode DTC)
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DESCRIPTION

The tire pressure warning ECU and receiver receives speed signals from the combination meter via CAN communication. This DTC is stored upon entering test mode (signal check mode), and cleared when a vehicle speed signal of 20 km/h (12 mph) is detected for 3 seconds or more. This DTC is output only in test mode (signal check mode).

DTC No. DTC Detection Condition Trouble Area
C2191/91 Speed sensor circuit malfunction

  • CAN communication system

  • Vehicle speed signal circuit

  • Combination meter

  • Tire pressure warning ECU and receiver
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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.

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PROCEDURE


  1. Click here

    CHECK CAN COMMUNICATION SYSTEM


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power 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 (for LHD:Click here, for RHD:Click here).

      OK
      The CAN communication system is normal.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

  2. Click here

    CHECK VEHICLE SPEED SIGNAL (DATA LIST)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

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

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

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

      Table 1. 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.

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    CHECK TEST MODE DTC (C2191/91)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power 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
      DTC C2191/91 is not cleared A
      DTC C2191/91 is cleared B

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    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVERClick here

  5. Click here

    GO TO CAN COMMUNICATION SYSTEMClick here

  6. Click here

    GO TO METER / GAUGE SYSTEMClick here

  7. Click here

    CHECK FOR INTERMITTENT PROBLEMSClick here

  8. Click here

    GO TO CAN COMMUNICATION SYSTEMClick here