Audio System (W/O LEXUS Navigation System): Troubleshooting

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.

• Open or short circuit of the wire harness
• Connector or terminal connection fault
  TROUBLESHOOTING
  
  

  	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 Auto Changer	CD magazine cannot be inserted.	16
  	CD magazine 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 magazine 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.

1. DIAGNOSIS FUNCTION 

   Error codes over tuner and connected equipment are displayed on the screen of tuner.

   HINT:

   For LEXUS RX300, press the function switch instead of TRACK TUNE APS switch.

   1. Diagnosis start-up

      For shifting to diagnosis mode, push "DISC" switch 3 times with pressing "1" and "6", "7" or "8" of function switch at the same time while the audio power is OFF and ACC is ON. To exit from diagnosis mode, press "DISC" switch for 2 seconds or turn the ignition key OFF (When "1-190" is displayed, the mode is transferred to LAN check mode.)

   2. LAN check

      When starting up the diagnosis mode, the mode turns to LAN check mode, the screen displays the code numbers (physical address) of tuner and connected equipment. Smaller codes are displayed in order, displayed code numbers are switched by operating TUNE "UP" or "DOWN" switch. In LAN check mode, by pressing "5" of function switch for more than 2 secs., diagnosis memory of each equipment can be deleted, when deletion is completed, the mode returns to LAN check mode.

      Fig 1: Identifying Disc Switch

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Code No. (physical address) List 

      PHYSICAL ADDRESS LIST
      
      

      Code No. (physical address)	Equipment name
      190	Radio receiver assembly (Audio head unit)
      1 c4(RX300)	Center Cluster Integration Switch
      1 d4(RX300)	Multi Display
      240	CD changer (in Luggage room)
      360	CD changer (in center console and glove compartment box)
      440	Power amplifier

   3. System check

      When pressing "1" of function switch in LAN check mode, the mode turns to the system check mode, the system performs self diagnosis of connected equipment and displays the results. ("SYS" (showing the system is under detection) is displayed.)

   4. Perform the operation shown in the following illustration, then read the result of the inspection.

      HINT:

      • It sometimes takes approx. 40 secs, till the system inspection is completed.
      • The chart below is an example of when diagnosis code "21" appears on the physical address (190) equipment. (ROM error occurs on the radio receiver.)
      • The smaller code numbers (physical address) are displayed in order (code No., diagnosis code, support code of diagnosis code (object equipment)).
      • When no error is detected in the system, "00" is displayed.
      • When an error code is detected, up to 6 codes per one system are displayed. Pressing TUNE "UP" or "DOWN" switches the display.
      • In the system check mode, when pressing "8" of function switch the mode returns to LAN check mode.
        Fig 2: Identifying Player Display

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Diagnosis memory
      1. In LAN check mode, when pressing "2" of TRACK TUNE APS switch the mode turns to the diagnosis memory mode. ("CODE" is displayed.)

         The results of self diagnosis performed over tuner and connected equipment are memorized and displayed.

      2. Perform the operation shown in the following illustration, then read the result of the inspection.

         HINT:

         • The smaller code numbers (physical address) are displayed in order (code No., periodic communication number when error occurs, diagnosis code, and support code of diagnosis code (object equipment)).
         • When no error is detected in the system, "00" is displayed. When an error code is detected, up to 6 codes per one system are displayed. Pressing TUNE "UP" or "DOWN" switches the display. Each diagnosis code is same as code in the system check mode.
         • When pressing "8" of function switch, the mode returns to LAN check mode.
         • The following illustration below is an example of when diagnosis code "D1" appears on the code (190) and (240 or 360) equipment. (Communication error occurs between the radio receiver and CD changer.)
           Fig 3: Identifying Player Display

           Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   6. Diagnosis memory clear
      1. After error is fixed, start up the diagnosis mode.
      2. Continue pressing TRACK TURN APS switch "5" for 2 secs. (CLr is displayed.)
      3. Press the TRACK TURN APS switch "2" and transfer to the diagnosis memory mode and check that the normal code (00) is output.
2. DIAGNOSIS CODE LIST 
   • If there is "O" in the column of system check, an error can be detected when the mode is switched to the system check mode.
   • If there is "O" in the column of diagnosis mode, each unit is monitoring whether or not it has failure. In case of detecting failure, it memorizes DTC.
     DIAGNOSIS ITEM
     
     

     Parts Name	DTC	Diagnosis item	Diagnosis content	Countermeasure and inspected parts	System Check	Diagnosis memory
     Head Unit (190)	21	ROM error	There is an error on internal ROM.	Radio receiver check.	O	X
     	22	RAM error	There is an error on internal RAM.		O	X
     	41	AM tuner error	There is an error in AM tuner.		X	O
     	42	FM tuner error	There is an error in FM tuner.		X	O
     	50	Cassette error	There is an error in cassette deck.		X	O
     	51	Cassette eject error	Cassette can not be ejected from Head Unit.		X	O
     	D1	Transmitter error	Communication with the equipment that is communicating has failed successively.	Radio receiver check. Wire harness and connector check.	O	O
     	D2	Periodic communication no response	Error in periodic communication.	Wire harness and connector	X	O
     	D4	Periodic communication error	Connection confirmation has not come from the equipment that is communicating	Radio receiver check. Wire harness check.	X	O
     	FF	Diagnosis no response	Result of diagnosis is not issued from start to finish. Radio receiver check.	O	X
     CD (240) (360)	21	ROM error	There is an error on internal ROM.	CD changer check.	O	X
     	22	RAM error	There is an error on internal RAM.		O	X
     	60	CD error	Error codes other than 61-69 are detected.		X	O
     	61	EJECT error	CD is not ejected.	CD changer check. Magazine check.	X	O
     	62	DISC inside out/flaw	CD is inserted inside out or it has a flaw.	CD check.	X	O
     	63	Pickup temperature detection	High temperature of CD changer is detected.	CD changer check.	X	O
     	64	Excessive current detection	Excessive current to CD changer is detected.		X	O
     	67	Tray insertion/ discharging error	An error occurs in insertion and discharging operation of CD changer tray.	CD changer check. Magazine check.	X	O
     	68	Elevator error	An error occurs in elevator of CD changer elevator.	CD changer check.	X	O
     	69	Clamp error	An error occurs in CD changer clamp.		X	O
     	D1	Transmitter error	Communication with the equipment that is communicating has failed successively.		O	O
     	D4	Periodic communication error	Connection confirmation has not come from the equipment that is communicating	Radio receiver check. Wire harness check.	X	O
     	FF	Diagnosis no response	Result of diagnosis is not issued from start to finish. CD changer check.	O	X
     AMP (440)	D1	Transmitter error	Communication with the equipment that is communicating has failed successively.	Stereo component amplifier check.	O	O
     	D4	Periodic communication error	Connection confirmation has not come from the equipment that is communicating	Radio receiver check. Wire harness check.	X	O
     	FF	Diagnosis no response	Result of diagnosis is not issued from start to finish.	Stereo component amplifier check.	O	X
     Center Cluster (1c4)	D1	Transmitter error	Communication with the equipment that is communicating has failed successively.	Center Cluster Check	O	O
     	D4	Periodic communication error	Connection confirmation has not come from the equipment that is communicating	Radio receiver check. Wire harness check.	X	O
     Multi Display (1 d4)	D1	Transmitter error	Communication with the equipment that is communicating has failed successively.	Multi-Display Check	O	O
     	D4	Periodic communication error	Connection confirmation has not come from the equipment that is communicating	Radio receiver check. Wire harness check.	X	O
     	21	ROM error	There is an error on internal ROM.	Multi-Display Check	O	X
     	22	RAM error	There is an error on internal RAM.		O	X

     (): w/ Navigation system

1. RADIO NOT OPERATING WHEN POWER SWITCH TURNED TO "ON" 
   Fig 4: Diagnostic Flowchart - Radio Not Operating When Power Switch Turned To On

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Radio DISPLAY INDICATES WHEN POWER SWITCH TURNED TO "ON", BUT NO SOUND (INCLUDING "NOISE") IS PRODUCED 
   Fig 5: Diagnostic Flowchart - Display Indicates When Power Switch Turned To On But No Sound (Including Noise) Is Produced

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Radio NOISE PRESENT, BUT AM-FM NOT OPERATING 
   Fig 6: Diagnostic Flowchart - Noise Present, But Am-Fm Not Operating

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Radio ANY SPEAKER DOES NOT WORK 
   Fig 7: Diagnostic Flowchart - Any Speaker Does Not Work

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. ANY AM OR FM DOES NOT WORK 5 Radio FEW PRESET TUNING BANDS 
   Fig 8: Diagnostic Flowchart - Any AM Or FM Does Nor Work Few Preset Tuning Bands

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Radio POOR RECEPTION 
   Fig 9: Diagnostic Flowchart - Poor Reception

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Radio SOUND QUALITY POOR 
   Fig 10: Diagnostic Flowchart - Sound Quality Poor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Radio PRESET MEMORY DISAPPEARS 
   Fig 11: Diagnostic Flowchart - Preset Memory Disappears

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. Tape Player CASSETTE TAPE CANNOT BE INSERTED 
   Fig 12: Diagnostic Flowchart - Cassette Tape Cannot Be Inserted

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
10. Tape Player CASSETTE TAPE INSERTED, BUT NO POWER 
    Fig 13: Diagnostic Flowchart - Cassette Tape Inserted, But No Power

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
11. Tape Player POWER COMING IN, BUT TAPE PLAYER NOT OPERATING 
    Fig 14: Diagnostic Flowchart - Power Coming In, But Tape Player Not Operating

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
12. Tape Player ANY SPEAKER DOES NOT WORK 
    Fig 15: Diagnostic Flowchart - Any Speaker Does Not Work

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
13. Tape Player SOUND QUALITY POOR (VOLUME FAINT) 
    Fig 16: Diagnostic Flowchart - Sound Quality Poor (Volume Faint)

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
14. Tape Player TAPE JAMMED MALFUNCTION WITH TAPE SPEED OR AUTO-REVERSE 
    Fig 17: Diagnostic Flowchart - Tape Jammed Malfunction With Tape Speed Or Auto-Reverse

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
15. Tape Player CASSETTE TAPE WILL NOT BE EJECTED 
    Fig 18: Diagnostic Flowchart - Cassette Tape Will Not Be Ejected

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
16. CD Auto Changer CD MAGAZINE CANNOT BE INSERTED 
    Fig 19: Diagnostic Flowchart - CD Magazine Cannot Be Inserted

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
17. CD Auto Changer CD MAGAZINE INSERTED, BUT NO POWER 
    Fig 20: Diagnostic Flowchart - CD Magazine Inserted, But No Power

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
18. CD Auto Changer POWER COMING IN, BUT CD AUTO CHANGER NOT OPERATING 
    Fig 21: Diagnostic Flowchart - Power Coming In, But CD Auto Changer Not Operating

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
19. CD Auto Changer SOUND JUMPS 
    Fig 22: Diagnostic Flowchart - Sound Jumps

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
20. CD Auto Changer SOUND QUALITY POOR (VOLUME FAINT) 
    Fig 23: Diagnostic Flowchart - Sound Quality Poor (Volume Faint)

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
21. CD Auto Changer ANY SPEAKER DOES NOT WORK 
    Fig 24: Diagnostic Flowchart - Any Speaker Does Not Work

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
22. CD Auto Changer CD MAGAZINE WILL NOT BE EJECTED 
    Fig 25: Diagnostic Flowchart - CD Magazine Will Not Be Ejected

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
23. Power Amplifier NO POWER COMING IN 
    Fig 26: Diagnostic Flowchart - No Power Coming In

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
24. POWER COMING IN, BUT WOOFER (POWER) AMPLIFIER NOT 
    Fig 27: Diagnostic Flowchart - Power Coming In, But Woofer (Power) Amplifier Not Operating

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
25. Power Amplifier ANY SPEAKER DOES NOT WORK 
    Fig 28: Diagnostic Flowchart - Any Speaker Does Not Work

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
26. NOISE OCCURS 
    Fig 29: Diagnostic Flowchart - Noise Occurs

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
27. NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING 
    Fig 30: Diagnostic Flowchart - Noise Produced By Vibration Or Shock While Driving

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
28. NOISE PRODUCED WHEN ENGINE STARTS 
    Fig 31: Diagnostic Flowchart - Noise Produced When Engine Starts

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002