RX-8 S1 Audio On Board DTCs and Tests

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Diagnostic Trouble Code (DTC) Mode

Procedure for initializing Diagnostic Test Mode
  1. Turn the ignition switch to the ACC/ON position
  2. Hold down the Power, then press and hold FM/AM and TAPE/MD buttons simultaneously for 2+ seconds
    RX-8 head unit with buttons highlighted for audio DTC mode
    Hold down the POWER button, then press and hold FM/AM and TAPE/MD for 2 seconds
  3. Use the seek up and down buttons to scroll through the codes

[Note: This mode will not initialize if you have no DTCs in memory]

Supplier, Device and Code Identification Procedure
  1. Initialize the DTC mode
  2. The LCD will display three items
    1. Supplier Code
    2. Device Code/Part Number
    3. Error Code
LCD display example of RX-8 audio DTC mode
Supplier Code Device Code : Error Code
Supplier Code Supplier Name
1 FMS Audio
2 Panasonic
3 Clarion
Device Code Device
00 Cassette Deck
03 CD Player
05 CD Changer (External)
06 CD Changer (In Unit)
07 MD Player (Mini Disk)
09 Base Unit
Screen Display System Malfunction Location
DTC Code Error Message
09: Er22 Base unit (peripheral circuit for tuner)
09: Er20 Power supply circuit to base unit
00: Er10 Cassette deck communication circuit system
03: Er10 CD player communication circuit system
05: Er10 CD changer (external) communication circuit

system

06: Er10 CD changer (upper module) communication

circuit system

07: Er10 MD player communication circuit system
03: Er01 CD player system
03: Er02 CHECK CD CD player system
03: Er07 CHECK CD
00: Er01 Cassette deck system
00: Er03 Cassette deck system
00: Er04 CHECK TAPE Cassette tape system
05: Er01 CD changer (external) system
05: Er07 CHECK CD CD changer (external) system
06: Er01 CD changer (upper module) system
06: Er02 CHECK CD CD changer (upper module) system
06: Er07 CHECK CD CD changer (upper module) system
07: Er01 MD player system
07: Er02 CHECK MD MD player system
07: Er07 CHECK MD MD player system
07: Er08 CHECK MD MD system
10: Er01 CD player system MP3 operation
10: Er02 CHECK CD CD player system MP3 operation
10: Er02 No DTCs stored

For more information about the DTC codes for the RX-8 audio head unit see page 281 in the body manual on the RX-8 manuals page: Mazda RX-8 (SE3P) 2003-2012 Service Manuals

DTC Memory Clearing Procedure
  1. Initialize the DTC mode
  2. Hold down the POWER button, then press and hold the TEXT/AUDIO CONT button for 2 seconds
    RX-8 audio head unit with buttons highlighted for DTC memory clear
    RX-8 audio head unit with buttons highlighted for DTC memory clear
  3. To exit DTC mode, turn the ignition switch to LOCK

LCD Test

  1. With the audio head unit on, hold down the POWER button and press the SEEK button for 1 second
    RX-8 stereo head unit LCD diagnostic test
    Hold down the POWER button and press the SEEK up button
  2. The LCD display should have all spaces lit up. If any portion is not lit, or the display is faint, there is a malfunction
    RX-8 LCD screen in test mode
    Properly functioning RX-8 LCD screen in LCD test mode
  3. To exit the LCD test mode, turn the audio head unit off, or move the ignition switch to the LOCK position

Button Test

  1. With the audio head unit on, press and hold the POWER button and press the CLOCK button for 1 second
    Button test mode for Mazda RX-8
    Hold down the POWER button, and press the CLOCK button for 1 second
  2. Once activated, press any button and listen for the beep to verify it is working. No functions will be activated by the buttons in this mode for testing
  3. To exit button test mode, turn the audio head unit off or move the ignition switch to LOCK

Speaker Test

  1. With the audio head unit on, press and hold the POWER button and press the TUNE/AUTO-M button for 1 second
    RX-8 speaker test buttons on head unit
    Press and hold the POWER button and press the TUNE/AUTO-M button for 1 second
  2. Each speaker should output sound in individually in this order:
    1. Front passenger door speaker and tweeter
    2. Front driver door speaker and tweeter
    3. Rear driver side speaker
    4. Rear passenger speaker
  3. To exit the speaker test turn the audio head unit off or turn the ignition switch to LOCK

Radio Signal Test

  1. With the audio head unit on, press and hold the POWER button, then press PRESET 2 for 1 second
    RX-8 radio signal test buttons
    Press and hold the POWER button, then press the PRESET 2 button for 1 second
  2. Tune the radio to a frequency with known good reception. If possible, verify signal with another radio
  3. Read the output on the LCD screen and examine the table below
    RX-8 LCD radio signal test mode
  4. To exit the Radio Signal Test turn the audio head unit off or turn the ignition switch to LOCK
Display Action
LEV - 5~9 Antenna, antenna feeder and base unit are normal
LEV - 3~4 Change the frequency (radio station) and inspect

again.

LEV - 0~2 Inspect the antenna and antenna feeder
  • If either the antenna or the antenna feeder is not normal, replace the malfunctioning part.
  • If the antenna and antenna feeder are normal, replace the base unit.