Audio System - Diagnostics: Diagnosis Toyota 4Runner IV

HOW TO PROCEED WITH TROUBLESHOOTING

1. Vehicle Brought To Workshop
2. «CUSTOMER PROBLEM ANALYSIS»(ref-190088-S32568118082005091300000)
3. Check And Clear DTC (see «PRE-CHECK»(ref-190088-S41799477402005091300000) )
4. Problem Symptom Confirmation Symptom Occurs (Go To Step 6 ) Symptom Does Not Occur (Go To Step 5)
5. «SYMPTOM SIMULATION»(ref-190050-S14480022552005091300000)
6. DTC Check (See «PRE-CHECK»(ref-190088-S41799477402005091300000) ) : Malfunction Code (Go To Step 7) : Normal Code (Go To Step 8 )
7. DTC Chart (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-190088-S17003500542005091300000) ) : Go To Step 9
8. «PROBLEM SYMPTOMS TABLE»(ref-190088-S24330451642005091300000)
9. Circuit Inspection (See «WIRING DIAGRAM»(ref-190088-S31030355852005091300000) and «INSPECTION PROCEDURE»(ref-190088-S08614140182005091300000) )
10. Confirmation Test END

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1. Diagnosis Check Starting Diagnosis Mode (All elements are lighting and in SW check mode). Turn off the audio system and turn the IG switch to ACC. While pressing the preset switches "1" and "6" at the same time, press "DISK" 3 times. Reference: Beep sound is given 3 times and the system enters the all elements are lighting and in SW check mode. It may take about 40 sec. to complete the check. Turn all the elements in the LCD on. Make a sound of beeps when pressing the switch. "SEEK TRACK" button switches to "Service Check Screen". Service Check Screen Reference In the service check mode, the system check and the diagnosis memory check are performed, and the check results are displayed in ascending order of the device codes (physical address.) TERMS MEANING Terms Meaning Component Code (Physical Address) Three-digit code (In hexadecimal) given to each device comprising AVC-LAN. Corresponding to its function, individual symbol is provided. Logical address Two-digit code (In hexadecimal) given to each function and device unit in each device comprising AVC-LAN. Code No. (physical address) List CODE NO. (PHYSICAL ADDRESS) LIST Component Code (Physical Address) Equipment Name 190/160 Radio receiver assy (Audio head unit) 440 Stereo component amplifier Finishing Diagnosis Mode. Press "DISC" for 2 sec. or more, or turn the IG switch OFF. Service Check Mode Result Display (for checking the current and the past system conditions). Press the "SEEK TRACK" switch to see the check result of each device. Check Result Display. RESULT CHECK Display Original Language Meaning Action to be taken good Good (normal) No DTC is detected in both "System Check Mode" and "Diagnosis Memory Mode". - nCon No connection The system recognized the component when it was registered, but the component gives no response to the "Diagnosis Mode ON Request". Check the power source circuit and the communication circuit of the device indicated by the device code (physical address). ECHn Exchange One or more DTC for "Exchange" is detected in either "System Check Mode" or "Diagnosis Memory Mode". Go to the detail information mode to check the trouble area referring to the DTC list. CHEC Check When no DTC is detected for "Exchange", one or more DTC for "Check is detected in either "System Check Mode" or "Diagnosis Memory Mode". Go to the detail information mode to check the trouble area referring to the DTC list. Display Original Language Meaning Action to be taken Old Old version Old DTC application is identified and DTC is detected in either "System Check Mode" or "Diagnosis Memory Mode". - nrES No response The device gives no response to any one of "System Check Mode ON Request", "System Check Result Request" and "Diagnosis Memory Request". Check the power source circuit and the communication circuit of the device indicated by the device code (physical code). To perform the Service Check again, press the preset switch "1". Detail information Mode (when displaying the troubled device's DTC) With "CHEC" or "ECHn" being display, press the preset switch "2" to go to the detail information mode. Press the "TUNE" switch to display "System Check Result (SyS)" and "Diagnosis Memory Response (COdE)". Displayed Items in Detail Information Mode Check the trouble area referring to the DTC list. To return to the service check mode, press the preset switch "3". Clearing Individual DTC Memory (when clearing the memory of DTC detected in the past individually) Press the preset switch "5" for 2 sec. or more while the "ECHn" is displayed in the service check mode or during the detail information mode. NOTE: Beep sound is given once when the DTC memory is completely cleared. When DTC memory is cleared, only the component code (physical address) is displayed for the target component. To check DTC, press the preset switch "1" and perform the service check again. Clearance of all DTC memory (when clearing all the memory of DTC detected in the past) Start the diagnosis mode after repairing the trouble area. Press the preset switch "5" for 2 sec. or more. ("CLr" is displayed at this time.) NOTE: Beep sound is given once when the DTC memory is completely cleared. When DTC memory for all the device is cleared, only the component codes (physical address) are displayed. Press the preset switch "1" to perform the service check again, and check that no DTC is displayed for all the component codes (physical address).
2. Identification Of Noise Source Identify the condition under which the noise occurs, and check the noise filter on the related part. NOISE CHECK Condition In Which Noise Occurs Noise Source Depressing the acceleration pedal increases noise, and stopping the engine erases the noise immediately. Generator Noise occurs during the A/C or the heater operation. Blower motor Rapid acceleration during driving on the unpaved road or after the IG switch is turned ON makes noise. Fuel pump Pressing and then releasing the horn switch, and keeping pressing the horn switch makes unusual noise. Horn Stopping the engine erases small noise that has been heard. Ignition Noise occurs synchronously with the turn signal flash. Flasher Noise occurs during the window washer operation. Washer Noise occurs during the engine running, and it continues after the engine is stopped. Engine coolant temperature sensor Noise occurs during the wiper operation. Wiper Noise occurs when the brake pedal is depressed. Stop light switch Others. Static electricity stored on the vehicle Reference: Make sure first that there is no noise from outside. Failing to do so makes the noise source detection difficult and leads to misunderstanding. The noise should be removed in descending order of loudness. Setting the radio unSEEK DOWN makes noise noticeable, making the recognition of the phenomenon easier.

DIAGNOSTIC TROUBLE CODE CHART

TERMS MEANING

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1. Pioneer Made: Radio Receiver Assy (Physical Address: 190) NOTE: *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. 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. Logical address: 01 (Communication control) Logical address: 61 (Cassette switch) Logical address: 62 (CD player)
2. Stereo Component Amplifier Assy (Physical Address: 440) NOTE: *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 be stored when the engine key is turned again 1 min. after engine start. *3: This code 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. Logical address: 01 (Communication control)
3. Stereo Component Controller Assy NOTE: *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 be stored when the engine key is turned again 1 min. after engine start. *3: This code 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. Logical address: 01 (Communication control)

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1. Radio Receiver Assy (Except 6 Speaker)
2. Radio Receiver Assy (6 Speaker)
3. Stereo Component Amplifier Assy
4. Stereo Component Controller Assy

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1. Inspect Radio Receiver Assy (BU+B, ACC+B, GND) Check that the continuity between terminals at each condition, as shown in the chart. Standard: Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Check And Replace Radio Receiver Assy

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1. Inspect Radio Receiver Assy (ILL+B, GND) Check that the voltage between terminals at each condition, as shown in the chart. Standard: OK : Check And Replace Radio Receiver Assy NG : Go To Next Step
2. Inspect Radio Receiver Assy (ILL-, GND) Check that the voltage between terminals at each condition, as shown in the chart. Standard: OK : Check And Replace Radio Receiver Assy NG : Go To Next Step
3. Inspect Light Control Rheostat (see «INSTRUMENT PANEL/METER»(ref-190141) ) OK : Check And Replace Radio Receiver Assy NG : Repair Or Replace Harness Or Connector

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1. Inspect System Check the system. Check whether the stereo component amplifier assy is a built-in type or a separate type. AMPLIFIER TYPE (A) (B) Built-in type amplifier Separate type amplifier B : Go To Step 4 A : Go To Next Step
2. Inspect Radio Receiver Assy (Output Signal) Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Check And Replace Radio Receiver Assy OK : Go To Next Step
3. Check Speaker (Resistance) Check continuity. Check that the continuity exists between terminals of speaker. Standard: 2 - 8ohm NG : Replace Speaker OK : Repair Or Replace Harness Or Connector
4. Inspect Radio Receiver Assy (MUTE, GND) Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Check And Replace Radio Receiver Assy OK : Go To Next Step
5. Inspect Stereo Component Amplifier Assy (MUTE, GND) Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Go To Next Step
6. Inspect Radio Receiver Assy (Output Signal) Check that the continuity between terminals at each condition, as shown in the chart. Standard: NG : Check And Replace Radio Receiver Assy OK : Go To Next Step
7. Inspect Stereo Component Amplifier Assy (Input Signal) Check that the continuity between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Go To Next Step
8. Inspect Stereo Component Amplifier Assy (Output Signal) Check that the continuity between terminals at each condition, as shown in the chart. Standard: NG : Check And Replace Stereo Component Amplifier Assy OK : Go To Next Step
9. Check Speaker (Resistance) Check continuity. Check that the continuity exists between terminals of speaker. Standard: 2 - 8ohm NG : Replace Speaker OK : Repair Or Replace Harness Or Connector

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1. Adjust Sound Quality Adjust the sound quality. Operate the radio receiver assy to adjust the sound quality. Standard: The condition returns to be normal. OK : Bad Sound Quality NG : Go To Next Step
2. Compare It With Another Car Of Same Model Compare it with another vehicle of the same model. Compare with the vehicle of the same type which does not have a trouble to see if there is any difference in the condition of trouble occurrence. Standard: No difference found. OK : Normal NG : Go To Next Step
3. Inspect System Check the system. Check whether the stereo component amplifier assy is a built-in type or a separate type. AMPLIFIER TYPE (A) (B) Built-in type amplifier Separate type amplifier B : Go to step 5 A : Go To Next Step
4. Inspect Radio Receiver Assy (Output Signal) Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Go To Next Step
5. Check Speaker (Resistance) Check continuity. Check that the continuity exists between terminals of speaker. Standard: 2 - 8ohm NG : Replace Speaker OK : Normal
6. Inspect Radio Receiver Assy (MUTE, GND) Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Check And Replace Radio Receiver Assy OK : Go To Next Step
7. Inspect Stereo Component Amplifier Assy (MUTE, GND) Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Go To Next Step
8. Inspect Radio Receiver Assy (Output Signal) Check that the continuity between terminals at each condition, as shown in the chart. Standard: NG : Check And Replace Radio Receiver Assy OK : Go To Next Step
9. Inspect Stereo Component Amplifier Assy (Input Signal) Check that the continuity between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Go To Next Step
10. Inspect Stereo Component Amplifier Assy (Output Signal) Check that the continuity between terminals at each condition, as shown in the chart. Standard: NG : Check And Replace Stereo Component Amplifier Assy OK : Go To Next Step
11. Check Speaker (Resistance) Check continuity. Check that the continuity exists between terminals of speaker. Standard: 2 - 8ohm NG : Replace Speaker OK : Repair Or Replace Harness Or Connector

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1. Check If Radio Auto-Search Functions Properly Check if the radio auto-search functions properly. Perform the auto-search of the radio and check that it functions normally. Standard: The radio auto-search functions properly. OK : Check And Replace Radio Receiver Assy NG : Go To Next Step
2. Check Optional Component Check optional component (Sun shade film, telephone antenna etc.). Check whether or not any optional component is installed, such as the sunshade film and the telephone antenna, is installed. Standard: Optional component is installed. OK : Effect From Optional Component NG : Go To Next Step
3. Check Antenna For Noise Production Noise Check with Antenna With the ignition switch in ACC, turn on the radio and choose the AM mode. Place a tip of a screwdriver or the antenna of the antenna assembly w/ holder and check that the noise heard from the speaker. Standard: Noise occurs OK : Check And Replace Radio Receiver Assy NG : Go To Next Step
4. Inspect Radio Receiver Assy (Antenna) Preparation for Check Remove the antenna plug of the radio receiver assembly. Noise Check With the radio receiver assembly connector connected, turn the ignition switch to ACC. Turn on the radio and choose the AM mode. Place a flat-head screwdriver or a metal such as a thin wire on the antenna jack of the radio receiver assembly and check that the noise heard from the speaker. Standard: Noise occurs. OK : Check And Replace Radio Receiver Assy NG : Replace Antenna Cord Sub-Assy

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1. Check For Any Foreign Object Check for any foreign object. Check that no foreign object or defect is detected in the cassette tape player of radio receiver assembly. Standard: No foreign object and defect detected. NG : Remove Foreign Object OK : Go To Next Step
2. Check Cassette Tape Check the cassette tape. Check that the cassette tape is a normal tape to which music or voice is recorded. Standard: Proper cassette tape to which music or voice is recorded NG : Cassette Tape Faulty OK : Go To Next Step
3. Replace Cassette Tape With Another And Recheck Replace the cassette tape with another and recheck. Replace the faulty cassette tape with the normal one to see if the same trouble occurs again. Standard: The function is recovered to be normal. OK : Cassette Tape Faulty NG : Go To Next Step
4. Check If Radio Auto-Search Functions Properly Check if the radio auto-search functions properly. Perform the auto-search of the radio and check that the operation is normal. Standard: The operation returns to be normal. OK : Check And Replace Radio Receiver Assy NG : Go To Next Step
5. Inspect Radio Receiver Assy (BU+B, ACC+B, GND) Check that the continuity between terminals at each condition, as shown in the chart. Standard: TERMINALS CONTINUITY SPECIFICATIONS Tester Connection Condition Specified Condition GND - Body Ground Constant Continuity Check that the voltage between terminals at each condition, as shown in the chart. Standard: TERMINALS VOLTAGE FOR EACH CONDITION CHECK Tester Connection Condition Specified Condition BU+B - GND/E Constant 10 - 14 V ACC+B - GND/E Ignition switch ACC or ON 10 - 14 V OK : Check And Replace Radio Receiver Assy NG : Repair Or Replace Harness Or Connector

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1. Check If Radio Auto-Search Functions Properly Check if the radio auto-search function properly. Perform the auto-research of the radio and check that the operation is normal. Standard: malfunction disappear. NG : Go to step 5 OK : Go To Next Step
2. Press "Eject" And Check Operation Press "EJECT" and check the operation. Press the cassette tape EJECT switch of the radio receiver assembly for 2 sec or more and check that the cassette tape is ejected. Standard: The cassette tape is ejected. NG : Check And Replace Radio Receiver Assy OK : Go To Next Step
3. Check Cassette Tape Check the cassette tape. Check that the ejected cassette tape does not have the label peeling, cassette body deformation and others. Standard: No fault on the cassette tape. NG : Cassette Tape Faulty OK : Go To Next Step
4. Replace Cassette Tape With Another And Recheck Replace the cassette tape with another and recheck. Replace the faulty cassette tape with the normal one to see if the same trouble occurs again. Standard: malfunction disappear. OK : Cassette Tape Faulty NG : Go To Next Step
5. Inspect Radio Receiver Assy (BU+B, ACC+B, GND) Check that the continuity between terminals at each condition, as shown in the chart. Standard: TERMINALS CONTINUITY FOR EACH CONDITION CHECK Tester Connection Condition Specified Condition GND - Body ground Constant Continuity Check that the voltage between terminals at each condition, as shown in the chart. Standard: TERMINALS VOLTAGE FOR EACH CONDITION CHECK Tester Connection Condition Specified Condition BU+B - GND/E Constant 10 - 14 V ACC+B - GND/E Ignition Switch ACC or ON 10 - 14 V OK : Check And Replace Radio Receiver Assy NG : Repair Or Replace Harness Or Connector

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1. Replace Cassette Tape With Another And Recheck Replace the cassette tape with another and recheck. Replace the faulty cassette tape with the normal one to see if the same trouble occurs again. Standard: malfunction disappear. OK : Cassette Tape Faulty NG : Go To Next Step
2. Check For Any Foreign Object Check for foreign object. Check that no foreign material and troubles are detected in the radio receiver assembly cassette tape player. NG : Remove Foreign Object OK : Go To Next Step
3. Clean Head And Check Operation Head cleaning Raise the cassette door with your finger. Next, using a pencil or similar object, push in the guide. Using a cleaning pen or cotton applicator soaked in cleaner, clean the head surface, pinch rollers and capstans. Check that the same trouble occurs again. OK : Head Dirty NG : Check And Replace Radio Receiver Assy

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1. Check For Any Foreign Object Check for any foreign object. Check that no foreign material and troubles are detected in the radio receiver assembly cassette tape player. Standard: No foreign material and trouble detected. NG : Remove Foreign Object OK : Go To Next Step
2. Replace Cassette Tape With Another And Recheck (Below 90 Min.) Replace the cassette tape with another and recheck. Replace the faulty cassette tape with the normal one (90 min or less) to see if the same trouble occurs again. Standard: malfunction disappear. OK : Cassette Tape Faulty NG : Go To Next Step
3. Clean Head And Check Operation Head cleaning Raise the cassette door with your finger. Next, using a pencil or similar object, push in the guide. Using a cleaning pen or cotton applicator soaked in cleaner, clean the head surface, pinch rollers and capstans. Check that the same trouble occurs again. OK : Head Dirty NG : Check And Replace Radio Receiver Assy

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1. Check If A Proper CD Is Inserted Check that a proper CD is inserted. Make sure that the CD is normal audio CD, and that there is no deformation, flaw, stain, burr and other defects on the CD. Standard: Normal audio CD. Reference: Translucent or different-shaped CD cannot be played. CD-ROM for personal computers (with music recorded in) and recorded CD -R may not be played. Playing an 8-cm CD does not require an adapter. NG : CD Faulty OK : Go To Next Step
2. Check That A Proper CD Is Inserted Check that a proper CD is inserted. Check whether or not the CD is inserted upside down. Standard: Not upside down. NG : Set Disc Correctly OK : Go To Next Step
3. Disc Cleaning Disk cleaning If the disk gets dirty, clean the disk by wiping the surface from the center to outside in the radial directions with a soft cloth. NOTE: Do not use a conventional record cleaner or anti-static preservative. OK : Disc Dirty NG : Go To Next Step
4. Replace CD With Another And Recheck Replace the CD with another and recheck. Replace the faulty CD with the normal one to see if the same trouble occurs again. Standard: malfunction disappear. OK : CD Faulty NG : Go To Next Step
5. Check If Radio Auto-Search Functions Properly Check if the radio auto-search function properly. Perform the auto-research of the radio and check that the operation is normal. Standard: malfunction disappear. OK : Check And Replace Radio Receiver Assy NG : Go To Next Step
6. Inspect Radio Receiver Assy (BU+B, ACC+B, GND) Check that the continuity between terminals at each condition, as shown in the chart. Standard: TERMINALS CONTINUITY SPECIFICATIONS Tester Connection Condition Specified Condition GND - Body ground Constant Continuity Check that the voltage between terminals at each condition, as shown in the chart. Standard: TERMINAL VOLTAGE SPECIFICATIONS Tester Connection Condition Specified Condition BU+B - GND/E Constant 10 - 14 V ACC+B - GND/E Ignition Switch ACC or ON 10 - 14 V OK : Check And Replace Radio Receiver Assy NG : Repair Or Replace Harness Or Connector

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1. Check If A Proper CD Is Inserted Check that a proper CD is inserted. Make sure that the CD is a normal audio CD, and that there is no deformation, flaw, stain, burr and other defects on the CD. Standard: Normal audio CD. Reference: Translucent or different-shaped CD cannot be played. CD-ROM for personal computers (with music recorded in) and recorded CD-R may not be played. Playing an 8-cm CD does not require an adapter. NG : CD Faulty OK : Go To Next Step
2. Check That A Proper CD Is Inserted Check that a proper CD is inserted. Check whether or not the CD is inserted upside down. Standard: Not upside down. NG : Set Disc Correctly OK : Go To Next Step
3. Disc Cleaning Disk cleaning If the disk gets dirty, clean the disk by wiping the surface from the center to outside in the radial directions with a soft cloth. NOTE: Do not use a conventional record cleaner or anti-static preservative. OK : Disc Dirty NG : Go To Next Step
4. Replace CD With Another And Recheck Replace the CD with another and recheck. Replace the faulty CD with the normal one to see if the same trouble occurs again. Standard: malfunction disappear. OK : CD Faulty NG : Go To Next Step
5. Check If Radio Auto-Search Functions Properly Check if the radio auto-search function properly. Perform the auto-research of the radio and check that the operation is normal. Standard: malfunction disappear. NG : Go To Step 7 OK : Go To Next Step
6. Did The Temperature In The Cabin Change Rapidly? Did the temperature in the cabin change rapidly? Check whether or not the rapid temperature change occurred in the cabin. Standard: The rapid temperature change occurred. Reference: The rapid temperature change creates condensation inside the CD player, which may disable playing CD. OK : Condensation Due To Temperature Change (Leave It As It Is For A While Before Using) NG : Check And Replace Radio Receiver Assy
7. Inspect Radio Receiver Assy (BU+B, ACC+B, GND) Check that the continuity between terminals at each condition, as shown in the chart. Standard: Check that the voltage between terminals at each condition, as shown in the chart. Standard: OK : Check And Replace Radio Receiver Assy NG : Repair Or Replace Harness Or Connector

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1. Check If Radio Auto-Search Functions Properly Check if the radio auto-search function properly. Perform the auto-research of the radio and check that the operation is normal. Standard: malfunction disappear. NG : Go to step 5 OK : Go To Next Step
2. Press "Eject" And Check Operation Press "EJECT" and check the operation Press the CD EJECT switch of the radio receiver assembly for 2 sec or more to see if the CD is ejected. Standard: CD is ejected. Reference: If the CD is not ejected, send the vehicle for repair. Do not try to drag it out by force. NG : Check And Replace Radio Receiver Assy OK : Go To Next Step
3. Check If A Proper CD Is Inserted Check that a proper CD is inserted. Check that in what conditions the sound skipping occurs. Standard: Driving on the bad road. NG : CD Faulty OK : Go To Next Step
4. Replace CD With Another And Recheck Replace the CD with another and recheck. Check the installation condition of the radio receiver assembly. Standard: Installed properly. OK : CD Faulty NG : Go To Next Step
5. Inspect Radio Receiver Assy (BU+B, ACC+B, GND) Check that the continuity between terminals at each condition, as shown in the chart. Standard: TERMINALS CONTINUITY SPECIFICATIONS Tester Connection Condition Specified Condition GND - Body ground Constant Continuity Check that the voltage between terminals at each condition, as shown in the chart. Standard: TERMINALS VOLTAGE SPECIFICATIONS Tester Connection Condition Specified Condition BU+B - GND/E Constant 10 - 14 V ACC+B - GND/E Ignition Switch ACC or ON 10 - 14 V OK : Check And Replace Radio Receiver Assy NG : Repair Or Replace Harness Or Connector

INSPECTION PROCEDURE

1. Replace CD With Another And Recheck Replace the CD with another and recheck. Check the installation condition of the radio receiver assembly. Standard: malfunction disappear. NG : CD Faulty OK : Check And Replace Radio Receiver Assy

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1. Disc Cleaning Disk cleaning If the disk gets dirty, clean the disk by wiping the surface from the center to outside in the radial directions with a soft cloth. NOTE: Do not use a conventional record cleaner or anti-static preservative. Standard: malfunction disappear. OK : Disc Dirty NG : Go To Next Step
2. Replace CD With Another And Recheck Replace the CD with another and recheck. Check the installation condition of the radio receiver assembly. Standard: malfunction disappear OK : CD Faulty NG : Go To Next Step
3. Check When This Happens Check then this happens. Check that in what condition (place) noise occurs. Standard: Driving on the bumpy road OK : Go to step 5 NG : Go To Next Step
4. Compare It With Another Car Of Same Model Compare it with another vehicle of the same model. Compare with the vehicle of the same type which does not have a trouble to see if there is any difference in the condition of trouble occurrence. Standard: No difference found OK : Setting NG : Go To Next Step
5. Check Of Radio Receiver Assembly Installation Check of radio receiver assembly installation. Check the installation condition of the radio receiver assembly. Standard: Installed properly NG : Install The Radio Receiver Assembly Properly OK : Go To Next Step
6. Did The Temperature In The Cabin Change Rapidly? Did the temperature in the cabin change rapidly? Check whether or not the rapid temperature change occurred in the cabin. Standard: The rapid temperature change occurred. Reference: The rapid temperature change creates condensation inside the CD player, which may disable playing CD. OK : Condensation Due To Temperature Change (Leave It As It Is For A While Before Using) NG : Check And Replace Radio Receiver Assy

1. Check Of Speaker Installation Check speaker installation condition. Check that each speaker is securely installed. Standard: malfunction disappear. NOTE: The radio is equipped with noise prevention system that does not work against the regular use of the radio, thereby excessively large noise cannot occur in the radio. If large noise occurs, check whether or not the earth on the antenna installation part and the proper noise-prevention equipment are all installed, and whether or not the improper wiring is held. NOSE CHECK Condition In Which Noise Occurs Noise Type Depressing the acceleration pedal increases noise, and stopping the engine erases the noise immediately. Alternator Noise Noise occurs during the A/C or the heater operation. Blower Motor Noise Rapid acceleration during the drive on the unpaved road or after the IG switch is turned ON makes noise. Fuel Pump Noise Pressing and then releasing the horn switch, and keeping pressing the horn switch makes noise. Horn Noise Stopping the engine erases the small noise that has been heard. Ignition Noise Noise occurs in turn with the blink of the turn signal flash. Flasher Noise Noise occurs during the window washer operation. Washer Noise Noise occurs during the engine running, and it continues to occur after the engine is stopped. Water Temperature Sensor Noise Noise occurs during the wiper operation. Wiper Noise Noise occurs when the brake pedal is depressed Stop Light Switch Noise Others. Static electricity on the vehicle NOTE: Identify the condition under which the noise occurs, and check the noise filter on the related part. Make sure first that there is no noise from outside. Failing to do so makes the noise occurrence source detection impossible and leads to misunderstanding. The noise should be removed in descending order of loudness. NG : Install It Properly OK : Identification Of Noise Source

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1. Check Symptoms Check the masking object. Check for the masking object between the wireless headphone and the stereo component control. Standard: Return to normal control. NOTE: Since the voice sound of the wireless headphone is converted into the infrared light for the transmission, the voice sound cannot be transmitted if there is a masking object between the emission part and the receiving part. OK : Normal NG : Go To Next Step
2. Check Battery (Headphone Stereo Assy) Check the dry cell battery. Check that the dry cell battery is not used up. Standard: The dry cell battery is not used up. NG : Battery Empty OK : Go To Next Step
3. Cleaning IR Receiver Sensor Clean up the infrared light emission part. Clean up the infrared light emission part of the stereo component control. Check if the same abnormality occurs again. Standard: Function return to normal condition. OK : IR LED Dirty NG : Go To Next Step
4. Inspect Radio Receiver Assy (RMUT, GND) Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Check And Replace Radio Receiver Assy OK : Go To Next Step
5. Check And Replace Stereo Component Controller Assy (RMUT, GND) Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Go To Next Step
6. Inspect Radio Receiver Assy (Output Signal) Check that the continuity between terminals at each condition, as shown in the chart. Standard: NG : Check And Replace Radio Receiver Assy OK : Go To Next Step
7. Inspect Stereo Component Controller Assy (Input Signal) Check that the continuity between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Check And Replace Stereo Component Controller Assy

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1. Cleaning IR Receiver Sensor Clean up the infrared light emission part. Clean up the infrared light emission part of the stereo component control. Check if the same abnormality occurs again. Standard: Function return to normal condition. OK : IR Receiver Dirty NG : Go To Next Step
2. Check Battery (Remote Controller Assy) Check the dry cell battery. Check that the dry cell battery is not used up. Standard: The dry cell battery is not used up. NG : Battery Empty OK : Go To Next Step
3. Inspect Harness Or Connector (Radio Receiver Assy - Stereo Component Controller Assy) Except 6 Speaker (Separate AMP): Check that the continuity between terminals at each condition, as shown in the chart. Standard: 6 Speaker (Built-in AMP): Check that the continuity between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Go To Next Step
4. Check Stereo Component Controller Assy (+B, ACC, GND) Check that the continuity between terminals at each condition, as shown in the chart. Standard: Check that the voltage between terminals at each condition, as shown in the chart. Standard: NG : Repair Or Replace Harness Or Connector OK : Check And Replace Radio Switch And Volume Assy