TIRE PRESSURE WARNING SYSTEM TEST MODE PROCEDURE


  1. TEST MODE (SIGNAL CHECK MODE) PROCEDURE

    Tech Tips


    • When entering test mode (signal check mode), the tire pressure warning ECU and receiver sets all the test mode (signal check mode) DTCs first.

      After the tire pressure warning ECU and receiver completes the signal check for each inspection item, the DTCs for systems that are determined to be normal will be cleared.

      The DTCs for other inspection items may not be cleared when only a certain signal is inspected.

    • When test mode (signal check mode) returns to normal mode, all the test mode (signal check mode) DTCs will be cleared.

    • Operation of the tire pressure warning reset switch can be checked in test mode (signal check mode).

    • During test mode (signal check mode), the system will not be initialized by pushing the tire pressure warning reset switch. The circuit of the tire pressure warning reset switch can be inspected during this mode.


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and the GTS on.

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

      Tech Tips

      Every time the test mode (signal check mode) DTC clear conditions are satisfied, the tire pressure warning light illuminates for 1 second. Following this, the tire pressure warning light blinks at 0.125 second intervals.

      A01X1UQE01
      Text in Illustration
      *a 0.125 sec.
      *b ON
      *c OFF

    5. Press the tire pressure warning reset switch (DTC C2198/98).

    6. Wait for 1.5 minutes with the vehicle stopped, or drive the vehicle at a speed of 50 km/h (31 mph) or more for 1 minute (DTCs C2181/81 to C2185/85).

      Tech Tips

      The tire pressure warning valve and transmitters send signals to the tire pressure warning ECU and receiver once every 1.5 minutes while the vehicle is stopped and once every minute while driving.

    7. w/ Front Antenna:

      Perform the tire pressure warning antenna check (C2195/95).

      Tech Tips

      The conformity of the antenna connection and radio frequency is automatically detected.


      1. During test mode (signal check mode), set the number of times required to turn the ignition switch from off to ON in order to return to normal mode to 2 times.

      2. After entering test mode, turn the ignition switch off and then to ON again.

    8. Check that the tire pressure warning system test mode (signal check mode) DTCs are cleared.

      Test Mode (Signal Check Mode) DTC Test Signal Test Mode (Signal Check Mode) DTC Clear Condition
      C2181/81 to C2185/85 Transmitter Data Data is received from the relevant transmitter which has a registered ID in the tire pressure warning ECU and receiver.
      C2195/95*

      • Open in tire pressure warning antenna

      • Radio frequency mismatch

      		 Continuity of the antenna terminal and conformity of the radio wave frequency are detected.
      C2198/98 Tire Pressure Warning Reset Switch Signal A signal is received indicating that the tire pressure warning reset switch is pressed.

      • *: w/ Front Antenna

    9. Result

      Tech Tips

      After the signal check is completed, check for test mode (signal check mode) DTCs to confirm the system status.

      Condition Procedure
      Test mode (signal check mode) DTCs are output Repair the faulty part and enter Signal Check again
      Test mode (signal check mode) DTCs are cleared No problem

    10. End of test mode (signal check mode)


      1. After completing the test mode (signal check mode), turn the ignition switch off and disconnect the GTS.

    11. Test mode (signal check mode) DTCs


      1. If a trouble code is displayed during the test mode (signal check mode) DTC check, check the diagnostic procedure listed for that code. For details of each code, refer to "See page" below.

        DTC No. Detection Item Trouble Area See page
        C2181/81 Transmitter ID1 not received

        • Tire pressure warning valve and transmitter

        • Tire pressure warning antenna*

        • Harness or connector

        • Tire pressure warning ECU and receiver

        Click here

        C2182/82 Transmitter ID2 not received

        • Tire pressure warning valve and transmitter

        • Tire pressure warning antenna*

        • Harness or connector

        • Tire pressure warning ECU and receiver

        Click here

        C2183/83 Transmitter ID3 not received

        • Tire pressure warning valve and transmitter

        • Tire pressure warning antenna*

        • Harness or connector

        • Tire pressure warning ECU and receiver

        Click here

        C2184/84 Transmitter ID4 not received

        • Tire pressure warning valve and transmitter

        • Tire pressure warning antenna*

        • Harness or connector

        • Tire pressure warning ECU and receiver

        Click here

        C2185/85 Transmitter ID5 not received

        • Tire pressure warning valve and transmitter

        • Tire pressure warning antenna*

        • Harness or connector

        • Tire pressure warning ECU and receiver

        Click here

        C2195/95* Multi-receiver Antenna Circuit (Test Mode DTC)

        • Tire pressure warning antenna*

        • Harness or connector

        • Tire pressure warning ECU and receiver

        Click here

        C2198/98 Initialization switch error

        • Tire pressure warning reset switch

        • Harness or connector

        • Tire pressure warning ECU and receiver

        Click here

        *: w/ Front Antenna