Section 380 (Audio System): Troubleshooting

1. Diagnosis start-up

   For shifting diagnosis mode, turn ignition switch ON and push the "DISC" switch 3 times while pressing "ch1" and "ch6" switches.

   HINT:

   To exist from the diagnosis mode, push the "DISC" switch for 1.7 sec. or turn ignition switch to OFF.

   Fig 1: Identifying Diagnosis Function Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Service check mode
   1. After the diagnosis start-up, the system enters service check mode.
   2. Error codes over tuner and connected equipment are displayed on the screen of tuner. Results for each check are displayed as follows:
      • good:

        No DTC is detected for both "System Check Confirmation" and "Diagnosis Memory Response".

      • nCon:

        The Component does not respond to the "Diagnosis On Instruction" command. Applicable to only the system where connected components are limited to be used.

      • ECHn:

        Application of new version has been confirmed by the "Diagnosis On Check", and there is one or more DTC which indicates "Replacement" in the "System Check Result Response" or "Diagnosis Memory Response".

      • CHEC:

        Application of new version has been confirmed by the "Diagnosis On Check", and there is no DTC which indicates "Replacement" in the "System Check Result Response" or "Diagnosis Memory Response", but one or more DTC which indicated "Check" is identified.

      • Old:

        Application of old version is confirmed by the "Diagnosis On Check", and DTC is identified) in the "System Check Result Response" or "Diagnosis Memory Response".

      • nrES:

        No response is identified to the "System Check Start Instruction" and "Request for System Check Result" commands.

   HINT:

   • Check the present and past condition of components by performing the System Check and collecting stored DTC memories.
   • Check results shall be displayed as one of six following indications: "good", "ECHn", "CHEC", "nCon", "Old" or "nrES".
3. Display Screen for Service Check.

   Example: 

   Connection parts (physical address): Radio receiver (P190), CD Auto Changer (P360), MD changer (P3A0)

   Fig 2: Example Of Display Screen (For Service Check)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. "ECHn" Detail Display Mode Screen
   Fig 3: Identifying "ECHn" Detail Display Mode Screen

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. "CHEC" Detail Display Mode Screen
   Fig 4: Identifying "CHEC" Detail Display Mode Screen

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. "Old" Detail Display Mode Screen
   Fig 5: Identifying "Old" Detail Display Mode Screen

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

1. Diagnosis start-up

   For shifting to diagnosis mode, push "DISC" switch 3 times with pressing "1" and "6" of PRESET 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 PRESET 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 6: Identifying Diagnosis Function 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)
   240	CD changer (in Luggage room)
   360	CD changer (in center console and glove compartment box)
   440	Stereo component amplifier

3. System check
   • When pressing "1" of PRESET 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.)
   • Perform the operation shown in the following illustration, then read the result of the inspection.

   HINT:

   • It sometimes takes approx. 40 sees, 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 "6" of PRESET switch the mode returns to LAN check mode.
   Fig 7: Identifying LAN Check Mode Screen

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Diagnosis memory
   1. In LAN check mode, when pressing "2" of PRESET 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 "6" of PRESET 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 8: Identifying LAN Check Mode Preset Switch Screen

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Diagnosis memory clear
   1. After error is fixed, start up the diagnosis mode.
   2. Continue pressing preset switch "5" for 2 sees. (CLr is displayed.)
   3. Press the preset switch "2" and transfer to the diagnosis memory mode and check that the normal code (00) is output.

1. Physical address 190: Radio receiver assembly
   1. Logical address: 01 (Communication control)
      DIAGNOSIS ITEM SPECIFICATION
      
      

      DTC	Diagnosis item	Diagnosis content	Countermeasure and inspected parts
      D6 (1)	Absence of Master	Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, radio receiver assembly was disconnected.	Check harness for power supply system of radio receiver assembly. Check harness for communication system of radio receiver assembly.
      D8 (2)	No Response to Connection Check	Component shown by auxiliary code is or had been disconnected from system after engine is start. D9	Check harness for power supply system of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code.
      D9 (1)	Last Mode Error	Component operated (sounds and/or images were provided) before engine stop is or has been disconnected with ignition switch in ACC or ON.	Check harness for power supply system of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code.
      DA	No Response to ON/OFF Instruction	No response is identified when changing mode (audio and visual mode change). Detected when sound and picture does not change by button operation.	Check harness for power supply system of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code. If error occurs again, replace component shown by auxiliary code.
      DB (1)	Mode Status Error	Dual alarm is detected.	Check harness for power supply of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code.
      DC (3)	Transmission Error	Transmission to component shown by auxiliary code has been failed. (Detecting this DTC does not necessarily mean actual failure.)	If same auxiliary code is recorded in order component, check harness for power supply and communication system of all components shown by code.
      DD (4)	Master Reset (Momentary Interruption)	After engine is started, radio receiver assembly was disconnected from system.	Check harness for power supply system of radio receiver assembly. Check harness for communication system of radio receiver assembly. If this error occurs frequently, replace radio receiver assembly assembly.
      DE (4)	Slave Reset (Momentary Interruption)	After engine is started, slave component was disconnected from system.	Check harness for power supply of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code.
      DF (5)	Master Error	Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component.	Check harness for power supply of radio receiver assembly. Check harness for communication system of radio receiver assembly. Check harness for communication system between radio receiver assembly and sub-master component.
      E0 (1)	Registration Completion Instruction Error	"Registration Completion Instruction" command from master cannot be received.	Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.
      E1 (1)	Audio processor ON error	While source equipment is operating, AMP output is stopped.	Check harness for power supply of radio receiver assembly. Check harness for communication system of radio receiver assembly.
      E2	ON/OFF Instruction Parameter Error	Error occurs in ON/OFF controlling command from radio receiver assembly.	Replace radio receiver assembly.
      E3 (1)	Registration Request Transmission	Registration Request command is output from slave component. Receiving Connection Check Instruction, Registration Request command is output from sub-master component.	Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.
      E4 (1)	Multiple Frame Abort	Multiple frame transmission is aborted.	Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.
      HINT (1) Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine. (2) It is stored when 180 sec. has passed after the power supply connector is pulled out after engine start. (3) It may be stored when the engine key is turned 1 min. again after engine start. (4) It may be stored when the engine key is turned again after engine start. (5) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.

   2. Logical address: 61 (Cassette switch)
      DIAGNOSIS ITEM SPECIFICATION
      
      

      DTC	Diagnosis item	Diagnosis content	Countermeasure and inspected parts
      40	Mechanical of Media Error	Malfunction due to mechanical failure is identified. Or cassette tape is cut or entangled.	Inspect cassette tape. Replace radio receiver assembly.

2. Physical address: 440 Stereo component amplifier

   Logical address: 01 (Communication control)

   DIAGNOSIS ITEM SPECIFICATION
   
   

   DTC	Diagnosis Item	Diagnosis content	Countermeasure and inspected parts
   D6 (1)	Absence of Master	Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, radio receiver assembly was disconnected.	Check harness for power supply of radio receiver assembly. Check harness for communication system of radio receiver assembly. Check harness for power supply of Stereo component amplifier. Check harness for communication system of Stereo component amplifier.
   D7 (2)	Communication Check Error	Component in which this code is recorded has been disconnected from system after engine start. Or, when this code was recorded, multi-display assembly was disconnected.	Check harness for power supply system of multi-display. Check harness for communication system of multi-display. Check harness for power supply system of stereo component amplifier. Check harness for communication system of stereo component amplifier.
   DC (3)	Transmission Error	Transmission to component shown by auxiliary code has been failed. (Detecting this DTC does not necessarily mean actual failure.)	If same auxiliary code is recorded in order component, check harness for power supply and communication system of all components shown by code.
   DD (4)	Master Reset (Momentary Interruption)	After engine is started, Stereo component amplifier was disconnected from system.	Check harness for power supply system of radio receiver assembly. Check harness for communication system of radio receiver assembly. If this error occurs frequently, replace radio receiver assembly assembly.
   DF *5	Master Error	Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component.	Check harness for power supply of radio receiver assembly. Check harness for communication system of radio receiver assembly. Check harness for communication system between Stereo component amplifier and sub-master component.
   E0 (1)	Registration Completion Instruction Error	"Registration Completion Instruction" command from master cannot be received.	Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.
   E1 (1)	Audio processor ON error	While source equipment is operating, AMP output is stopped.	Check harness for power supply of radio receiver assembly. Check harness for communication system of Stereo component amplifier.
   E2	ON/OFF Instruction Parameter Error	Error occurs in ON/OFF controlling command from Stereo component amplifier.	Replace Stereo component amplifier.
   E3 (1)	Registration Request Transmission	Registration Request command is output from slave component. Receiving Connection Check Instruction, Registration Request command is output from sub-master component.	Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.
   HINT (1) Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine. (2) It may be stored when the engine key is turned 1 min. again after engine start. (3) It may be stored when the engine key is turned again after engine start. (4) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.

3. Physical address: 360 CD Auto Changer
   1. Logical address: 01 (Communication control)
      DIAGNOSIS ITEM SPECIFICATION
      
      

      DTC	Diagnosis item	Diagnosis content	Countermeasure and inspected parts
      D1	Transmission Error	Transmission to component shown by auxiliary code has been failed. (This code does not necessarily mean actual failure.)	If same auxiliary code is recorded in other component(s), check harness for power supply and communication system of components shown sub code.
      D4 (1)	Connection check Error	Component in which this code is recorded is or was disconnected from system after engine start. Or, when recording this code, radio receiver assembly was disconnected.	Check harness for power supply of radio receiver assembly. Check harness for communication system of radio receiver assembly. Check harness for power supply of DVD auto changer. Check harness for communication system of DVD auto changer.
      HINT *1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine. *2: It may be stored when the engine key is turned 1 min. again after engine start. *3: It may be stored when the engine key is turned again after engine start. *4: It may be stored when the engine key is turned again after engine start. (1) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.

   2. Logical address: 63 (CD Auto Changer)
      DIAGNOSIS ITEM SPECIFICATION
      
      

      DTC	Diagnosis item	Diagnosis content	Countermeasure and inspected parts
      60	CD Error	Error is detected in CD auto changer.	Replace CD auto changer
      61	EJECT Error	Magazine cannot be ejected.	Replace CD auto changer
      62	No Disc Readout	Disc cannot be read.	Inspect CD
      63	CD Auto Changer Temp. Too High	Readout cannot be done because temperature around player's pick-up (reading part) is too high.	With IG switch OFF, leave vehicle in cool shaded place for a while and re-check. After deleting the DTC memory, if same code detected, replace CD auto changer.
      64	CD Changer Excess Current	Excess current is applied CD auto changer.	Replace CD auto changer

4. Physical address: 1C6 Gateway ECU

   HINT:

   1: When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.

   Logical address: 01 (Communication control)

   DIAGNOSIS ITEM SPECIFICATION
   
   

   DTC	Diagnosis Item	Diagnosis content	Countermeasure and inspected parts
   D4 *1	Regular Communication Error	Component in which this code is recorded has been disconnected after engine start. Or, when this code was recorded, radio receiver assembly was disconnected.	Check harness for power supply system of radio receiver assembly assembly. Check harness for communication system of radio receiver assembly assembly. Check harness for power supply system of gateway ECU. Check harness for communication system of gateway ECU.

• 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.

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

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