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Audio System: Troubleshooting

NOTE: When replacing the internal mechanism (computer part) of the audio system, be careful that no part of your body or clothing comes in contact with the terminals of the leads from the IC, etc. of the replacement part (spare part). 

HINT:

This inspection procedure is a simple troubleshooting which should be carried out on the vehicle during system operation and was prepared on the assumption of system component troubles (except for the wires and connectors, etc.).

Always inspect the trouble taking the following items into consideration.

TROUBLESHOOTING CHART

  Problem No.
Radio Radio not operating when power switch turned to `ON'.  1
Display indicates when power switch turned to `ON', but no sound (including "noise") is produced.  2
Noise present, but AM - FM not operating.  3
Any speaker does not work.  4
Any AM or FM does not work.  5
Few preset turning bands.  5
Reception poor.  6
Sound quality poor.  7
Preset memory disappears.  8
Tape Player Cassette tape cannot be inserted.  9
Cassette tape inserted, but no power.  10
Power coming in, but tape player not operating.  11
Any speaker does not work.  12
Sound quality poor.  13
Tape jammed, malfunction with tape speed or auto-reverse.  14
Cassette tape will not eject.  15
CD Player CD cannot be inserted.  16
CD inserted, but no power.  17
Power coming in, but CD player not operating.  18
Sound jumps.  19
Sound quality poor (Volume faint).  20
Any speaker does not work.  21
CD will not be ejected.  22
Power Amplifier No power coming in.  23
Power coming in, but power amplifier not operating.  24
Any speaker does not work.  25
Noise Noise occurs  26
Noise produced by vibration or shock while driving.  27
Noise produced when engine starts.  28

The term "AM" includes LW, MW and SW, and the term "FW" includes UKW.

    Radio 

  1. RADIO NOT OPERATING WHEN POWER SWITCH TURNED TO "ON" 
    Fig 1: Troubleshooting Flow Chart - Radio Display Indicates Radio Not Operating When Power Switch Turned To "ON"
    G02946960Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. DISPLAY INDICATES WHEN POWER SWITCH TURNED TO "ON", BUT NO SOUND (INCLUDING "NOISE") IS PRODUCED 
    Fig 2: Troubleshooting Flow Chart - Radio Display Indicates When Power Switch Turned To "ON", But No Sound (Including "Noise") Is Produced
    G02946961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. NOISE PRESENT, BUT AM-FM NOT OPERATING 
    Fig 3: Troubleshooting Flow Chart - Radio Display Indicates Noise Present, But AM-FM Not Operating
    G02946962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. ANY AM OR FM DOES NOT WORK 
    Fig 4: Troubleshooting Flow Chart - Radio Display Indicates Any AM Or FM Does Not Work
    G02946963Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. ANY AM OR FM DOES NOT WORK FEW PRESET TUNING BANDS 
    Fig 5: Troubleshooting Flow Chart - Radio Display Indicates Any AM Or FM Does Not Work Few Present Tuning Bands
    G02946964Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. POOR RECEPTION 
    Fig 6: Troubleshooting Flow Chart - Radio Display Indicates Poor Reception
    G02946965Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. SOUND QUALITY POOR 
    Fig 7: Troubleshooting Flow Chart - Radio Display Indicates Sound Quality Poor
    G02946966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. PRESET MEMORY DISAPPEARS 
    Fig 8: Troubleshooting Flow Chart - Radio Display Preset Memory Disappears
    G02946967Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    9. Tape Player 

  9. CASSETTE TAPE CANNOT BE INSERTED 
    Fig 9: Troubleshooting Flow Chart - Radio Display Cassette Tape Cannot Be Inserted
    G02946968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. CASSETTE TAPE INSERTED, BUT NO POWER 
    Fig 10: Troubleshooting Flow Chart - Radio Display Cassette Tape Inserted, But No Power
    G02946969Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. POWER COMING IN, BUT TAPE PLAYER NOT OPERATING 
    Fig 11: Troubleshooting Flow Chart - Radio Display Power Coming In, But Tape Player Not Operating
    G02946970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. ANY SPEAKER DOES NOT WORK 
    Fig 12: Troubleshooting Flow Chart - Radio Display Any Speaker Does Not Work
    G02946971Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. SOUND QUALITY POOR (VOLUME FAINT) 
    Fig 13: Troubleshooting Flow Chart - Radio Display Sound Quality Poor (Volume Faint)
    G02946972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. TAPE JAMMED MALFUNCTION WITH TAPE SPEED OR AUTO-REVERSE 
    Fig 14: Troubleshooting Flow Chart - Radio Display Tape Jammed Malfunction With Tape Speed Or Auto-Reverse
    G02946973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. CASSETTE TAPE WILL NOT BE EJECTED 
    Fig 15: Troubleshooting Flow Chart - Radio Display Cassette Tape Will Not Be Ejected
    G02946974Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    16. CD Player 

  16. CD CANNOT BE INSERTED 
    Fig 16: Troubleshooting Flow Chart - Radio Display CD Cannot Be Inserted
    G02946975Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. CD INSERTED, BUT NO POWER 
    Fig 17: Troubleshooting Flow Chart - Radio Display CD Inserted, But No Power
    G02946976Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. POWER COMING IN, BUT CD PLAYER NOT OPERATING 
    Fig 18: Troubleshooting Flow Chart - Radio Display Power Coming In, But CD Player Not Operating
    G02946977Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. SOUND JUMPS 
    Fig 19: Troubleshooting Flow Chart - Radio Display Sound Jumps
    G02946978Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. SOUND QUALITY POOR (VOLUME FAINT) 
    Fig 20: Troubleshooting Flow Chart - Radio Display Sound Quality Poor (Volume Faint)
    G02946979Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. ANY SPEAKER DOES NOT WORK 
    Fig 21: Troubleshooting Flow Chart - Radio Display Any Speaker Does Not Work
    G02946980Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. CD WILL NOT BE EJECTED 
    Fig 22: Troubleshooting Flow Chart - Radio Display CD Will Not Be Ejected
    G02946981Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    23. Power Amplifier 

  23. NO POWER COMING IN 
    Fig 23: Troubleshooting Flow Chart - Radio Display No Power Coming In
    G02946982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  24. POWER COMING IN, BUT WOOFER (POWER) AMPLIFIER NOT OPERATING 
    Fig 24: Troubleshooting Flow Chart - Radio Display Power Coming In, But Woofer (Power) Amplifier Not Operating
    G02946983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  25. ANY SPEAKER DOES NOT WORK 
    Fig 25: Troubleshooting Flow Chart - Radio Display Any Speaker Does Not Work
    G02946984Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    26. Noise 

  26. NOISE OCCURS 
    Fig 26: Troubleshooting Flow Chart - Radio Display Noise Occurs
    G02946985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  27. NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING 
    Fig 27: Troubleshooting Flow Chart - Radio Display Noise Produced By Vibration Or Shock While Driving
    G02946986Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  28. NOISE PRODUCED WHEN ENGINE STARTS 
    Fig 28: Troubleshooting Flow Chart - Radio Display Noise Produced When Engine Starts
    G02946987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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