RX400h · Service Manual BODY ELECTRICAL

DTC CHECK / CLEAR

Troubleshooting


START DIAGNOSTIC MODE

  1. There are 2 methods to start diagnostic mode. Start the mode by using one of them.

    HINT:
    1. Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
    2. After the ignition switch is turned on, check that the map is displayed before starting the diagnostic mode. Otherwise, some items cannot be checked.

  2. I034941E03
    Method 1

    1. Start the engine.

    2. While pressing and holding "INFO" switch, operate the light control switch, OFF → TAIL → OFF → TAIL → OFF → TAIL → OFF.

    3. The diagnostic mode starts and the service check screen ("System Check Mode") will be displayed. Service inspection starts automatically and the result will be displayed.

  3. E109432E03
    Method 2

    1. Start the engine.

    2. Switch to the "Display quality adjustment" screen.

    3. From the display quality adjustment screen, touch the corners of the screen in the following order: upper left→ lower left → upper left → lower left → upper left → lower left.

    4. The diagnostic mode starts and "Service Check" screen will be displayed. Service inspection starts automatically and the result will be displayed.

  4. I042624E01
    Diagnosis MENU

    1. Diagnostic screen will be displayed by pressing the menu switch on the service check screen.

  5. E106420E03
    Read the system check result.

    1. If all check results are "EXCH," "CHEK" or "Old," touch the display to check the contents on the "Unit Check Mode" screen and record them on the customer problem analysis check sheet.

      HINT:
      1. If all check results are "OK," go to communication DTC check (go to step PROCEDURE 1).
      2. If a device name is not known, its physical address is displayed.

    2. I038207E07
      If "EXCH", "CHEK" and "Old" as well as "OK" exist, press the service switch to return to the "System Check Mode". Then, check the "Unit Check Mode" screen and record them on the customer problem analysis check sheet.

  6. I038208E06
    Read the communication diagnostic check result (PROCEDURE 1).

    1. Return to the "System Check Mode", and press "LAN Mon" switch to enter the LAN monitor screen.

    2. E106422E02
      If the result is "CHEK" or "Old," touch the result switch to check the contents on the individual communication diagnostic screen and record them on the customer problem analysis check sheet.

      HINT:
      1. If all check results are "No Err," the system judges that no DTC exists.
      2. The sub-code (relevant device) will be indicated by its physical address.

    3. I038210E04
      If check results of other devices are "CHEK," press the "Service" switch to return to the original "LAN Monitor" screen. Then, check the individual communication diagnostic screen for the next device and record the result on the customer problem analysis check sheet.


FINISH DIAGNOSTIC MODE

  1. There are 2 methods to end diagnostic mode.

  2. Method 1

    1. Turn the ignition switch off.

  3. Method 2

    1. Press and hold the "Display" switch for 3 seconds.


DTC CLEAR/RECHECK

  1. I038211E03
    Clear DTC

    1. Press the "Code CLR" switch for 3 seconds.

    2. Check result is cleared.

  2. I038212E02
    Recheck

    1. Press the "Recheck" switch.

    2. I038213E03
      Confirm that all diagnostic codes are "OK" when the check results are displayed.
      If a code other than "OK" is displayed, troubleshoot again.

    3. I038213E04
      Press the "LAN Mon" switch to change to "LAN Monitor" mode.

    4. I038214E02
      Confirm that all diagnostic codes are "No Err".
      If a code other than "No Err" is displayed, troubleshoot again.

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