Section 423 (Audio System): Troubleshooting

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSIS FUNCTION
1. Diagnosis start-up
  For shifting to diagnosis mode, turn the ignition switch ON and push the "DISC" switch 3 times while pressing "ch1" and "ch6" switches.
  
  HINT:
  
  To exit the diagnosis mode, push the "DISC" switch for 1.7 sec. or turn the ignition switch to ACC or OFF.
2. Element check mode
  After the diagnosis start-up, the system enters the element check mode. Check that the all elements come on.
  
  HINT:
  
  By pressing the "TUNE UP" switch, the system enters the "Service Check Mode".
3. Switch check mode
  1. Element check mode is started at the same time with the switch check mode.
  2. Check that there is a beep sound when any switch is pressed.
  HINT:
  
  By pressing "TUNE UP" switch, the system enters the "Service Check Mode".
  
  Fig 1: Identifying Switches (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Service check mode
  1. After the element check and the switch check are completed, the system enters service check mode when "TUNE UP" switch is pressed.
  2. Error codes over the tuner and connected equipments are displayed on the screen of the 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 is 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 is 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 indicates "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 are displayed as one of the following six indications: "good", "ECHn", "CHEC" "nCon", "Old" or "nrES".
  Fig 2: Identifying Switches (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Display Screen for Service Check.
  Example:
  
  Connection parts ( physical address): Radio receiver (P190), RSA ECU (P1F4), DVD player (P1AO)
  
  Fig 3: Display Screen Mode Flow Chart (Service Check)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. "ECHn" Detail Display Mode Screen
  
  Fig 4: Display Mode Screen flow Chart (ECHn)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. "CHEC" Detail Display Mode Screen
  
  Fig 5: Display Mode Screen Flow Chart (CHEC)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. "Old" Detail Display Mode Screen
Fig 6: Display Mode Screen Flow Chart (Old)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DIAGNOSIS FUNCTION (Sub AVC-LAN)
HINT:

As starting Main AVC-LAN to operate the diagnosis mode, Sub AVC-LAN is also automatically enter the diagnosis mode. Perform the diagnosis mode operation on the RSA panel.
1. Element check mode
  After the diagnosis start-up, the system enters the element check mode. Check that the all elements come on.
  
  HINT:
  
  By pressing the "TUNE UP" switch, the system enters the "Service Check Mode".
2. Switch check mode
  1. Element check mode is started at the same time with the switch check mode.
  2. Check that there is a beep sound when any switch is pressed.
  HINT:
  
  By pressing "TUNE UP" switch, the system enters the "Service Check Mode".
  
  Fig 7: Identifying RSA Panel
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Service check mode
  1. After the element check and switch check are completed, the system enters service check mode when "TUNE UP" switch is pressed.
  2. Error codes over the tuner and connected equipments are displayed on the screen of the 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 is 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 is 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 indicates "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 are displayed as one of the following six indications: "good", "ECHn", "CHEC" "nCon", "Old" or "nrES".
  Fig 8: Identifying RSA Panel
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Display Screen for Service Check.
  Example:
  
  Connection parts ( physical address): Radio receiver (P190), RSA ECU (P1F4), DVD player (P1AO)
  
  Fig 9: Display Mode Screen Flow Chart (Service Check)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. "ECHn" Detail Display Mode Screen
  
  Fig 10: Display Mode Screen Flow Chart (ECHN)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. "CHEC" Detail Display Mode Screen
  
  Fig 11: Display Mode Screen Flow Chart (CHEC)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. "Old" Detail Display Mode Screen
  
  Fig 12: Display Mode Screen Flow Chart (Old)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DIAGNOSIS CODE LIST

w/ Navigation system (See DIAGNOSTIC TROUBLE CODE CHART )

Physical address: 190 Radio receiver assembly

*1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.

DIAGNOSIS CODE CHART

Logical address

DTC

Diagnosis item

Diagnosis content

Countermeasure and inspected parts

01 (Communication Control)

ROM Error

Error is detected in internal ROM.

Replace radio receiver assembly.

01 (Communication Control)

RAM Error

Error is detected in internal RAM.

Replace radio receiver assembly.

01 ⁽¹⁾ (Communication Control)

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.

01 ⁽²⁾ (Communication Control)

No Response to Connection Check

Component shown by auxiliary code is or had been disconnected from system after engine start.

Check harness for power supply system of component shown by auxiliary code.
Check harness for communication system of component shown by auxiliary code.

01 ⁽¹⁾ (Communication Control)

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.

01 (Communication Control)

No Response to ON/OFF Instruction

No response is identified when changing mode (audio and visual mode change). Detected when sound and picture cannot be changed by button operation.

Check harness for power supply 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.

01 ⁽¹⁾ (Communication Control)

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.

01 ⁽³⁾ (Communication Control)

Transmission Error

Transmission to component shown by auxiliary code has been failed. (Detecting this DTC does not necessary mean actual failure.)

If same auxiliary code is recorded in other component, check harness for power supply and communication system of components shown by sub code.

01 ⁽²⁾ (Communication Control)

Master Reset (Momentary Interruption)

After engine is started, radio receiver assembly was disconnected from system.

If this error occurs frequently, replace radio receiver assembly.

01 ⁽²⁾ (Communication Control)

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.

01 ⁽³⁾ (Communication Control)

Master Error

Due to defective condition of radio receiver assembly, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and radio receiver assembly.

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.

01 (Communication Control)

Registration Completion Instruction Error

"Registration Completion Instruction" command from radio receiver assembly cannot be received.

Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.

01 ⁽¹⁾ (Communication Control)

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.

01 (Communication Control)

ON/OFF Instruction Parameter Error

Error occurs in ON/OFF controlling command from radio receiver assembly.

Replace radio receiver assembly

01 (Communication Control)

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.

01 (Communication Control)

Plural Frame Abort

Plural frame transmission is aborted.

Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.

60 (Radio receiver assembly)

AM Tuner Error

Abnormal condition is detected in AM tuner. Inspect radio receiver assembly.

Replace radio receiver assembly.

60 (Radio receiver assembly)

FM Tuner Error

Abnormal condition is detected in FM tuner.

Replace radio receiver assembly.

61 (Cassette switch)

Mechanical or Media Error

Malfunction due to mechanical failure is identified or cassette tape is cut or entangled.

Inspect cassette tape.

61 (Cassette switch)

EJECT Malfunction

Malfunction due to mechanical failure.

Replace radio receiver assembly.

63 (In-dash CD auto changer)

No Disc Readout

Disc cannot be read.

Inspect CD.

63 (In-dash CD auto changer)

CD Error

Error is detected in CD auto changer.

Replace radio receiver assembly.

63 (In-dash CD auto Changer)

EJECT Error

CD cannot be ejected.

Replace radio receiver assembly.

63 (In-dash CD auto Changer)

CD High Temp.

High temperature is detected in CD auto changer.

Replace radio receiver assembly.

63 (In-dash CD auto Changer)

CD Excess Current

Excess current is applied to CD auto changer.

Replace radio receiver assembly.

⁽¹⁾	It may be stored when the engine key is turned (angain) (1 min.) after engine start.

⁽²⁾	It may be stored when the engine key is turned again after engine start.

⁽³⁾	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.

Physical address: 440 Stereo component amplifier

HINT:

DIAGNOSIS CODE CHART

Logical address

DTC

Diagnosis item

Diagnosis content

Countermeasure and inspected parts

01 (Communication Control)

ROM Error

Abnormal condition of ROM is detected.

Replace stereo component amplifier.

01 (Communication Control)

RAM Error

Abnormal condition of RAM is detected.

Replace stereo component amplifier.

01 (Communication Control)

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.

01*⁶ (Communication Control)

Connection Check Error

Component in which this code is recorded has been disconnected from system after engine start. 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.

01 (Communication Control)

DC ⁽²⁾

Transmission Error

Transmission to component shown by auxiliary code has bee 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 by sub code.

01 (Communication Control)

DD ⁽³⁾

Master Reset (Momentary Interruption)

After engine is started, radio receiver assembly was disconnected from system.

Check harness for power supply of radio receiver assembly.
Check harness for communication system of radio receiver assembly.
If error occurs frequently, replace radio receiver assembly.

01 (Communication Control)

DF ⁽⁴⁾

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.

01 (Communication Control)

E0 ⁽¹⁾

Registration Completion Instruction Error

"Registration Completion Instruction" command from radio receiver assembly cannot be received.

Since this DTC is provided for engineering, it may be detected when no actual failure exists.

01 (Communication Control)

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.

01 (Communication Control)

ON/OFF Instruction Parameter Error

Error is detected in ON/OFF control command from radio receiver assembly.

Replace radio receiver assembly.

01 (Communication Control)

Registration Request Transmission

Registration Request command is output from slave component.
By reception of connection check Instruction, Registration Request command is output from sub-master component.

Since this DTC is provided for engineering, it may be detected when no actual failure exists.

01 (Communication Control)

Plural Frame Abort

Plural frame transmission is aborted.

Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.

⁽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 (angain) (1 min.) 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.

Physical address: 1F4 RSA Panel (Main AVC-LAN)

DIAGNOSIS CODE CHART

Logical address

DTC

Diagnosis item

Diagnosis content

Countermeasure and inspected parts

01 (Communication Control)

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 RSA panel.
Check harness for communication system of RSA panel.

01*⁶ (Communication Control)

Connection Check Error

Component in which this code is recorded has been disconnected from system after engine start. 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 RSA panel.
Check harness for communication system of RSA panel.

01 (Communication Control)

DC ⁽²⁾

Transmission Error

Transmission to component shown by auxiliary code has bee 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 by sub code.

01 (Communication Control)

DD ⁽³⁾

Master Reset (Momentary Interruption)

After engine is started, radio receiver assembly was disconnected from system.

Check harness for power supply of radio receiver assembly.
Check harness for communication system of radio receiver assembly.
If error occurs frequently, replace radio receiver assembly.

01 (Communication Control)

DF ⁽⁴⁾

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.

01 (Communication Control)

E0 ⁽¹⁾

Registration Completion Instruction Error

"Registration Completion Instruction" command from radio receiver assembly cannot be received.

Since this DTC is provided for engineering, it may be detected when no actual failure exists.

01 (Communication Control)

Registration Request Transmission

Registration Request command is output from slave component.
By reception of connection check Instruction, Registration Request command is output from sub-master component.

Since this DTC is provided for engineering, it may be detected when no actual failure exists.

01 (Communication Control)

Plural Frame Abort

Plural frame transmission is aborted.

Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.

⁽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 (angain) (1 min.) 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.

Physical address: 16A, 16C RSA Panel (Sub AVC-LAN)

HINT:

*1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.

DIAGNOSIS CODE CHART

Logical address

DTC

Diagnosis item

Diagnosis content

Countermeasure and inspected parts

01 ⁽²⁾ (Communication Control)

No Response to Connection Check

Component shown by auxiliary code is or had been disconnected from system after engine 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.

01 ⁽¹⁾ (Communication Control)

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.

01 (Communication Control)

No Response to ON/OFF Instruction

No response is identified when changing mode (audio and visual mode change). Detected when sound and picture cannot be changed change by button operation.

Check harness for power supply 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.

01⁽¹⁾ (Communication Control)

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.

01 ⁽³⁾ (Communication Control)

Transmission Error

Transmission to component shown by auxiliary code has been failed. (Detecting this DTC does not necessary mean actual failure.)

If same auxiliary code is recorded in other component, check harness for power supply and communication system of components shown by sub code.

01 ⁽²⁾ (Communication Control)

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.

01 (Communication Control)

Plural Frame Abort

Plural frame transmission is aborted.

Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists.

⁽¹⁾	It may be stored when the engine key is turned (angain) (1 min.) after engine start.

⁽²⁾	It may be stored when the engine key is turned again after engine start.

⁽³⁾	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.

Physical address: 250 DVD Auto Changer

*2: This code may be stored when the engine key is turned again 1 min. after engine start.

DIAGNOSIS CODE CHART

Logical address

DTC

Diagnosis item

Diagnosis content

Countermeasure and inspected parts

01 (Communication Control)

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, RSA Panel was disconnected.

Check harness for power supply of RSA Panel.
Check harness for communication system of RSA Panel.
Check harness for power supply of DVD player.
Check harness for communication system of DVD player.

01 (Communication Control)

Communication Check Error

Component in which this code is recorded is was disconnected from system after engine start. Or, when recorded this code, RSA Panel was disconnected.

Check harness for power supply of RSA Panel.
Check harness for communication system of RSA Panel.
Check harness for power supply of DVD player.
Check harness for communication system of DVD player.

01 ⁽³⁾ (Communication Control)

Transmission Error

Transmission to component shown by sub-code has been failed. (Detecting this DTC does not necessary mean actual failure.)

If same sub-code is recorded in other component, check harness for power supply and communication system of components shown by sub code.

01 (Communication Control)

DD ⁽²⁾

Master Reset (Momentary Interruption)

After engine is started, radio receiver assembly was disconnected from system.

Check harness for power supply of RSA Panel.
Check harness for communication system of RSA Panel.
Check harness for power supply of DVD player.
Check harness for communication system of DVD player.

01 (Communication Control)

DF ⁽³⁾

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 RSA Panel.
Check harness for communication system of RSA Panel.
Check harness for communication system between RSA Panel.

01 (Communication Control)

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.

01 (Communication Control)

ON/OFF Instruction Parameter Error

Error is detected in ON/OFF control command from DVD player.

Replace DVD player.

01 (Communication Control)

Registration Request Transmission

Registration Request command is output from slave component.
By reception of connection check Instruction, Registration Request command is output from sub-master component.

Since this DTC is provided for engineering, it may be detected when no actual failure exists.

01 (Communication Control)

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.

01 (Communication Control)

RAM Error

Abnormal condition of RAM is detected.

Replace DVD player.

45 (DVD Changer)

DVD error

Error is detected in DVD player.

Replace radio and player.

45 (DVD Changer)

EJECT error

Disk cannot be ejected.

Check whether foreign matters enter inspection.

45 (DVD Changer)

Disk Crack

A crack and dirt are in a disk.

Inspect disk.

45 (DVD Changer)

DVD High Temp

High temperature is detected in DVD auto changer.

Do not stop the operation for a period of time.

45 (DVD Changer)

DVD Excess Current

Excess current is applied to DVD auto changer.

Replace DVD auto changer.

45 (DVD Changer)

A Malfunction in insertion/ejection

Operation malfunction in insertion/ ejection.

Replace DVD auto changer.

45 (DVD Changer)

A Malfunction in switching disk

Operation malfunction in switching disk.

Replace DVD auto changer.

⁽¹⁾	Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine.

⁽²⁾	This code may be stored when the engine key is turned again after engine start.

⁽³⁾	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.

PROBLEM SYMPTOMS TABLE

NOTE: When replacing the internal mechanism (computer part) of the audio system, be careful not to bring your body or clothing into contact with the terminals of the leads from the IC, etc. of the replacement part (spare part).

HINT:

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

Always inspect the trouble taking the following items into consideration.

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

PROBLEM SYMPTOMS CHART

Problem		Flow chart No.
Radio	Radio does not operate 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 does not operate.	3
	Any speaker does not work.	4
	Any AM or FM does not work.	5
	Few preset turning bands.	5
	Reception is poor.	6
	Sound quality is poor.	7
	Preset memory disappears.	8
Tape Player	Cassette tape cannot be inserted.	9
	Cassette tape inserted, but no power.	10
	Power comes in, but tape player does not operate.	11
	Any speaker does not work.	12
	Sound quality is poor.	13
	Tape jammed, malfunction with tape speed or auto-reverse.	14
	Cassette tape cannot be ejected.	15
CD Player	CD cannot be inserted.	16
	CD can be inserted but no power.	17
	Power coming in, but CD player does not operate.	18
	Sound jumps.	19
	Sound quality is poor (Volume faint)	20
	Any speaker does not work.	21
	CD cannot be ejected.	22
Power Amplifier	No power comes in.	23
	Power comes in, but power amplifier does not operate.	24
	Any speaker does not work.	25
Noise	Noise occurs	26
	Noise is produced by vibration or shock while driving.	27
	Noise is produced when engine starts.	28
Steering Pad Switch	A audio system cannot be operated with steering pad switch.	29
Rear Seat Audio	Quality of sound from headphone connected to headphone terminal is poor or no sound can be heard.	30

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

RADIO NOT OPERATING WHEN POWER SWITCH TURNED TO "ON"

Fig 13: Troubleshooting Flow Chart - Radio (1 Of 8)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Radio DISPLAY INDICATES WHEN POWER SWITCH TURNED TO "ON", BUT NO SOUND (INCLUDING "NOISE") IS PRODUCED

Fig 14: Troubleshooting Flow Chart - Radio (2 Of 8)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Radio NOISE PRESENT, BUT AM-FM NOT OPERATING

Fig 15: Troubleshooting Flow Chart - Radio (3 Of 8)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Radio ANY SPEAKER DOSE NOT WORK

Fig 16: Troubleshooting Flow Chart - Radio (4 Of 8)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Radio ANY AM OR FM DOES NOR WORK FEW PRESET TUNING BANDS

Fig 17: Troubleshooting Flow Chart - Radio (5 Of 8)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Radio POOR RECEPTION

Fig 18: Troubleshooting Flow Chart - Radio (6 Of 8)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Radio SOUND QUALITY POOR

Fig 19: Troubleshooting Flow Chart - Radio (7 Of 8)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Radio PRESET MEMORY DISAPPEARS

Fig 20: Troubleshooting Flow Chart - Radio (8 Of 8)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Tape Player CASSETTE TAPE CANNOT BE INSERTED

Fig 21: Troubleshooting Flow Chart - Tape Player (1 Of 7)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Tape Player CASSETTE TAPE INSERTED, BUT NO POWER

Fig 22: Troubleshooting Flow Chart - Tape Player (2 Of 7)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Tape Player POWER COMING IN, BUT TAPE PLAYER NOT OPERATING

Fig 23: Troubleshooting Flow Chart - Tape Player (3 Of 7)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Tape Player ANY SPEAKER DOES NOT WORK

Fig 24: Troubleshooting Flow Chart - Tape Player (4 Of 7)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Tape Player SOUND QUALITY POOR (VOLUME FAINT)

Fig 25: Troubleshooting Flow Chart - Tape Player (5 Of 7)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Tape Player TAPE JAMMED MALFUNCTION WITH TAPE SPEED OR AUTO-REVERSE

Fig 26: Troubleshooting Flow Chart - Tape Player (6 Of 7)
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Tape Player CASSETTE TAPE WILL NOT BE EJECTED

Fig 27: Troubleshooting Flow Chart - Tape Player (7 Of 7)
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CD Player CD CANNOT BE INSERTED

Fig 28: Troubleshooting Flow Chart - CD Player (1 Of 7)
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CD Player CD INSERTED, BUT NO POWER

Fig 29: Troubleshooting Flow Chart - CD Player (2 Of 7)
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CD Player POWER COMING IN, BUT CD PLAYER NOT OPERATING

Fig 30: Troubleshooting Flow Chart - CD Player (3 Of 7)
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CD Player SOUND JUMPS

Fig 31: Troubleshooting Flow Chart - CD Player (4 Of 7)
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CD Player SOUND QUALITY POOR (VOLUME FAINT)

Fig 32: Troubleshooting Flow Chart - CD Player (5 Of 7)
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CD Player ANY SPEAKER DOES NOT WORK

Fig 33: Troubleshooting Flow Chart - CD Player (6 Of 7)
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CD Player CD WILL NOT BE EJECTED

Fig 34: Troubleshooting Flow Chart - CD Player (7 Of 7)
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Power Amplifier NO POWER COMING IN

Fig 35: Troubleshooting Flow Chart - Power Amplifier (1 Of 3)
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Power Amplifier POWER COMING IN, BUT WOOFER (POWER) AMPLIFIER NOT OPERATING

Fig 36: Troubleshooting Flow Chart - Power Amplifier (2 Of 3)
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Power Amplifier ANY SPEAKER DOES NOT WORK

Fig 37: Troubleshooting Flow Chart - Power Amplifier (3 Of 3)
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NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING

Fig 39: Troubleshooting Flow Chart - Noise (2 Of 3)
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NOISE PRODUCED WHEN ENGINE STARTS

Fig 40: Troubleshooting Flow Chart - Noise (3 Of 3)
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Steering Pad Switch A AUDIO SYSTEM CANNOT BE OPERATED WITH STEERING PAD SWITCH

Fig 41: Troubleshooting Flow Chart - Steering Pad Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Rear Seat Audio QUALITY OF SOUND FROM HEADPHONE TERMINAL IS POOR OR NO SOUND CAN BE HEARD

Fig 42: Troubleshooting Flow Chart - Rear Seat Audio
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002