LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 694 (Audio System - Diagnostics) >> DTC Check/Clear
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Check/Clear

WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
  1. DIAGNOSTIC CHECK 
    1. Starting Diagnostic Mode (All elements come on during the SW check mode).
      1. Turn off the audio system and turn the ignition switch to the ACC position. While pressing the preset switches "1" and "6" at the same time, press the "DISC" 3 times.
        Fig 1: Pressing Preset Switches "1" & "6" And Pressing "DISC" 3 Times
        G03049429Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Reference:
        • When the system enters the Diagnostic Mode, a beep sound is emitted 3 times and all the elements come on during the SW check mode.
        • It takes about 40 seconds to complete the check.
        • Turn all the elements in the LCD on.
        • When pressing the switch, confirm a beep sound is emitted.
    2. Service Check Screen.
      1. Press the "SEEK TRACK" switch to enter the "Service Check Screen".
      2. In the service check mode, the system check and the diagnostic memory check are performed, and the check results are displayed in ascending order of the component codes (physical address.)
      Fig 2: Service Check Screen Chart
      G03049430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Code No. (physical address) List 

      CODE NO. (PHYSICAL ADDRESS)

      Code No. (physical address) Equipment name
      190 Radio receiver assy (Audio head unit)
      440 Stereo component amplifier assy
    3. Finishing Diagnostic Mode.
      1. Press the "DISC" for 2 seconds or more, or turn the ignition switch off.
    4. Service Check Mode Result Display (for checking the current and the past system conditions).
      1. Press the "SEEK TRACK" switch to see the check result of each component.
        Fig 3: Diagnosis Mode - Result Display
        G03049431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Check Result Display.
        Fig 4: Check Result Display Specifications Table (1 Of 2)
        G03049432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Fig 5: Check Result Display Specifications Table (2 Of 2)
        G03049433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. To perform the Service Check again, press the preset switch "1".
    5. Detailed Information Mode (when displaying the DTC for a troubled component)
      1. With "CHECK" or "ECHN" being displayed, press the preset switch "2" to go to the detailed information mode.
      2. Press the "SEEK TRACK" switch to display the "System Check Result (SYS)" and "Diagnostic Memory Response (CODE)".
        Fig 6: Service Check Mode
        G03049434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Displayed Items in Detailed Information Mode
        Fig 7: Displayed Items Terminal Description Mode Table
        G03049435Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Check the trouble area referring to the DTC list.
      5. To return to the service check mode, press the preset switch "3".
  2. DTC CLEAR 
    1. Clearing individual DTC memory (when clearing the memory of the DTC detected in the past individually)
      1. Press the preset switch "5" for 2 seconds or more while the "ECHN" is displayed in the service check mode or during the detailed information mode.

      HINT:

      • A beep sound is emitted once when the DTC memory is completely cleared.
      • When the DTC memory is cleared, only the component code (physical address) is displayed for the target component.
      • To check DTCs, press the preset switch "1" and perform the service check again.
    2. Clearing of all the DTC memory (when clearing all the memory of the DTCs detected in the past)
      1. Start the diagnostic mode after repairing the trouble area.
      2. Press the preset switch "5" for 2 seconds or more ("CLR" is displayed at this time).

        HINT:

        • A beep sound is emitted once when the DTC memory is completely cleared.
        • When the DTC memory for all the components is cleared, only the component codes (physical address) are displayed.
      3. Press the preset switch "1" to perform the service check again, and check that no DTCs are displayed for all the component codes (physical address).
    3. Finishing Diagnostic Mode.
      1. Press the "DISC" for 2 seconds or more, or turn the ignition switch off.