Audio System - Diagnostics: Diagnosis Toyota Highlander I рестайлинг

HOW TO PROCEED WITH TROUBLESHOOTING

1. VEHICLE BROUGHT TO WORKSHOP
2. CUSTOMER PROBLEM ANALYSIS (SEE «CUSTOMER PROBLEM ANALYSIS CHECK»(ref-226391-S25145540382006032800000) )
3. BASIC INSPECTION Basic inspection. Check the battery voltage. Standard: 11 to 14 V Check the power supply to the radio receiver assy. Turn the ignition switch to ACC position. Check whether or not the display appears on the radio receiver assy. DISPLAY DOES NOT APPEAR (PROCEED TO PROBLEM SYMPTOM TABLE) (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) ) DISPLAY APPEARS (GO TO STEP 4)
4. DTC CHECK (SEE «PRE-CHECK»(ref-226391-S10748688712006032800000) ) HINT: If the audio system is equipped with a multi-display, check DTCs in the NAVIGATION SYSTEM section (see «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-226393-S05178012562006032800000) ). DTC IS OUTPUT (GO TO STEP 9) DTC IS NOT OUTPUT (GO TO STEP 10)
5. DTC CHART (SEE «DIAGNOSTIC TROUBLE CODE CHART»(ref-226391-S30402888172006032800000) ) GO TO STEP 12
6. PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )
7. CIRCUIT INSPECTION AND PART INSPECTION (SEE «POWER SOURCE CIRCUIT (RADIO RECEIVER ASSY)»(ref-226391-S04142806592006032800000) - «AVC-LAN CIRCUIT (MULTI-DISPLAY CONTROLLER SUB-ASSY - RADIO RECEIVER ASSY»(ref-226391-S08474529382006032800000) )
8. IDENTIFICATION OF PROBLEM
9. CONFIRMATION TEST
10. END

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1. DIAGNOSTIC CHECK Starting Diagnostic Mode (All elements come on during the SW check mode.) Turn off the audio system and turn the ignition switch to the ACC position. While pressing the preset switches "1" and "6" at the same time, press the "DISC" 3 times. Reference: When the system enters the Diagnosis Mode, beep sound is emitted 3 times and all the elements come on during the SW check mode. It takes about 40 seconds to complete the check. Turn all the elements in the LCD on. When pressing the switch, confirm beep sound is emitted. Press the "SEEK TRACK UP" switch to enter the "Service Check Screen". Service Check Screen Reference: In the service check mode, the system check and the diagnostic memory check are performed, and the check results are displayed in ascending order of the component codes (physical address). TERMS MEANING Term 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 Code no. (physical address) Equipment name 190 Radio receiver assy (Audio head unit) 1F6, 16C Multi-display Controller Sub-assy Finishing Diagnostic Mode Press the "DISC" switch for 2 seconds or more, or turn the ignition 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 component. Check Result Display. DISPLAY MEANING Display Original Language Meaning Action to be taken good Good (normal) No DTCs are detected in both "System Check Mode" and "Diagnostic Memory Mode". - NCON No connection The system recognized the component when it was registered, but the component gives no response to the "Diagnostic Mode ON Request". Check the power source circuit and the communication circuit of the component indicated by the component code (physical address). ECHN Exchange One or more DTCs for "Exchange" are detected in either "System Check Mode" or "Diagnostic Memory Mode". Go to the detailed information mode to check the trouble area referring to the DTC list. CHEC Check When no DTCs are detected for "Exchange", one or more DTCs for "Check" are detected in either "System Check Mode" or "Diagnostic Memory Mode". Go to the detailed information mode to check the trouble area referring to the DTC list. OLD Old version Old DTC application is identified and DTC is detected in either "System Check Mode" or "Diagnostic Memory Mode". - NRES No response The device gives no response to any one of "System Check Mode ON Request", "System Check Result Request" and "Diagnostic Memory Request". Check the power source circuit and the communication circuit of the component indicated by the component code (physical address). To perform the Service Check again, press the preset switch "1". Detailed Information Mode (when displaying the DTC for a trouble component) With "CHEC" or "ECHN" being displayed, press the preset switch "2" to go to the detailed information mode. Press the "SEEK TRACK" switch to display the "System Check Result (SYS)" and "Diagnostic Memory Response (CODE)". Displayed Items in Detailed 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 the DTC detected in the past individually) Press the preset switch "5" for 2 seconds or more while the "ECHN" is displayed in the service check mode or during the detailed information mode. HINT: A beep sound is emitted once when the DTC memory is completely cleared. When the DTC memory is cleared, only the component code (physical address) is displayed for the target component. To check DTCs, press the preset switch "1" and perform the service check again. Clearance of all the DTC memory (when clearing all the memory of the DTCs detected in the past) Start the diagnostic mode after repairing the trouble area. Press the preset switch "5" for 2 seconds or more. ("CLR" is displayed at this time.) HINT: A beep sound is emitted once when the DTC memory is completely cleared. When the DTC memory is cleared, only the component codes (physical address) is displayed. Press the preset switch "1" to perform the service check again, and check that no DTCs are displayed for all the component codes (physical address).
2. IDENTIFICATION OF NOISE SOURCE Identify the condition in which the noise occurs, and check the noise filter on the related part. NOISE SOURCE IDENTIFICATION Condition in which noise occurs Noise Source Depressing the acceleration pedal increases the noise, and stopping the engine stops the noise immediately. Generator Noise occurs during A/C or the heater operation. Blower motor Rapid acceleration while driving on an unpaved road or after the ignition 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 Quiet noise is heard while the engine is running, but stops with the engine. 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 even after the engine stops. Engine codein 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. Turning the radio so that no station is received makes the noise more noticeable, making the recognition of the phenomenon easier.

DIAGNOSTIC TROUBLE CODE CHART

DIAGNOSTIC TROUBLE CODE

HINT

Titles for each unit are stated in the following order: physical address (parts name).

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1. 190 (RADIO RECEIVER ASSY) HINT: *: Even if no failure is detected, trouble codes may be stored depending on the battery condition or voltage for starting the engine. *: The code is stored 180 seconds after the power supply connector is disconnected after engine start. *: The code may be stored when the engine key is turned 1 minute after engine start. *: The code may be stored when the engine key is turned again after engine start. Logical address: 01 (Communication control) Logical address: 60 (Radio unit) LOGICAL ADDRESS: 60 (RADIO UNIT) DIAGNOSIS DTC Diagnosis item Diagnosis content Countermeasure and inspected parts 43 AM Tuner Error Abnormal condition of AM tuner is detected. Replace radio receiver assy. 44 FM Tuner Error Abnormal condition of FM tuner is detected. Replace radio receiver assy. Logical address: 61 (Cassette unit) Logical address: 62 (CD player) LOGICAL ADDRESS: 62 (CD PLAYER) DIAGNOSIS DTC Diagnosis item Diagnosis content Countermeasure and inspected parts 47 Detection of high temperature High temperature is detected in CD player. With ignition switch off, leave vehicle in cool shaded place for a while and recheck. After deleting the DTC memory, if same code detected, replace radio receiver assy. 48 Detection of excess current Excess current flows into CD player. Replace radio receiver assy. Logical address: 63 (In-dash CD changer) LOGICAL ADDRESS: 63 (IN-DASH CD CHANGER) DIAGNOSIS DTC Diagnosis item Diagnosis content Countermeasure and inspected parts 51 CD changer elevator error Mechanical error occurred during elevator operation Replace radio receiver assy. 52 CD changer clump error Failure in disc clamping or clamp error Replace radio receiver assy.
2. 1F6, 16C, 16D (MULTI-DISPLAY CONTROLLER SUB-ASSY) HINT: *1: Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting the engine. *2: The code is stored 180 seconds after the power supply connector is disconnected after engine start. *3: The code may be stored when the engine key is turned 1 minute after engine start. *4: The code may be stored when the engine key is turned again after engine start. *5: If the device is reported as not existing during verification, check the power source circuit and AVC-LAN circuit for the device. Logical address: 01 (Communication control)

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1. RADIO RECEIVER ASSY (STANDARD TYPE)
2. RADIO RECEIVER ASSY (JBL TYPE)
3. STEREO COMPONENT AMPLIFIER ASSY (JBL TYPE)
4. MULTI-DISPLAY CONTROLLER SUB-ASSY

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*1: JBL type

*2: w/ Navigation System

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CIRCUIT DESCRIPTION

This circuit provides the power to the radio receiver assy.

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1. CHECK TYPE HINT: If the radio receiver assy is JBL type, "JBL" is indicated on its surface. Choose type to be inspected. CHECK TYPE Type Go to step Standard type A JBL type B B: Go to step 3 A: Go to next step
2. INSPECT RADIO RECEIVER ASSY (BU+B, ACC+B, GND) Disconnect the connectors from the radio receiver assy. Measure the resistance according to the value in the table below. Standard: RADIO RECEIVER ASSY (BU+B, ACC+B, GND) CONTINUITY Tester connection Condition Specified condition GND - Body ground Always Below 1 ohm Measure the voltage according to the values in table below. Standard: RADIO RECEIVER ASSY (BU+B, ACC+B, GND) VOLTAGE Tester connection Condition Specified condition BU+B - GND Always 10 to 14 V ACC+B - GND Ignition SW ACC 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )
3. INSPECT RADIO RECEIVER ASSY (B, ACC, GND) Disconnect the connectors from the radio receiver assy. Measure the resistance according to the value in the table below. Standard: RADIO RECEIVER ASSY (B, ACC, GND) CONTINUITY Tester connection Condition Specified condition GND - Body ground Always Below 1 ohm Measure the voltage according to the values in the table below. Standard: RADIO RECEIVER ASSY (B, ACC, GND) VOLTAGE Tester connection Condition Specified condition B - GND Always 10 to 14 V ACC - GND Ignition SW ACC 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )

This circuit provides the power to the stereo component amplifier assy.

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1. INSPECT RADIO RECEIVER ASSY Measure the voltage according to the value in the table below. Standard: RADIO RECEIVER ASSY VOLTAGE Tester connection Condition Specified condition AMP+ - Body ground Radio receiver assy ON 10 to 14 V NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: Go to next
2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - STEREO COMPONENT AMPLIFIER ASSY) Disconnect the connectors from the radio receiver assy and stereo component amplifier assy. Measure the resistance according to the values in the table below. Standard: RADIO RECEIVER ASSY - STEREO COMPONENT AMPLIFIER ASSY CONTINUITY Tester connection Condition Specified condition AMP+ - AMP+ Always Below 1 ohm AMP+ - Body ground Always 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT STEREO COMPONENT AMPLIFIER ASSY (+B, ACC, GND) Disconnect the connectors from the stereo component amplifier assy. Measure the resistance according to the values in the table below. Standard: STEREO COMPONENT AMPLIFIER ASSY (+B, ACC, GND) RESISTANCE Tester connection Condition Specified condition GND - Body ground Always Below 1 ohm Measure the voltage according to the values in the table below. Standard: STEREO COMPONENT AMPLIFIER ASSY (+B, ACC, GND) VOLTAGE Tester connection Condition Specified condition +B - GND Always 10 to 14 V ACC - GND Ignition SW ACC 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )

This circuit provides the power to the multi-display controller sub-assy.

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1. INSPECT MULTI-DISPLAY CONTROLLER SUB-ASSY(+B1, ACC, GND, SELD) Disconnect the connectors from the multi-display controller sub-assy. Measure the resistance according to the value(s) in the table below. Standard: MULTI-DISPLAY CONTROLLER SUB-ASSY(+B1, ACC, GND, SELD) RESISTANCE Tester connection Condition Specified condition GND - Body ground Always Below 1 ohm SELD - Body ground Always Below 1 ohm Measure the voltage according to the value(s) in the table below. MULTI-DISPLAY CONTROLLER SUB-ASSY(+B1, ACC, GND, SELD) VOLTAGE Tester connection Condition Specified condition +B1 - GND Always 10 - 14 V ACC - GND Ignition SW ACC 10 - 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )

This circuit sends an operation signal from the steering pad switch to the radio receiver assy.

If there is an open in the circuit, the audio system cannot be operated by the steering pad switch.

If there is a short in the circuit, the same condition as that when the switch is continuously depressed occurs.

Therefore, the radio receiver assy cannot be operated by the steering pad switch, and also the radio receiver assy itself does not function.

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1. INSPECT RADIO RECEIVER ASSY Disconnect the connectors from the radio receiver assy. Measure the resistance according to the values in the table below. Standard: RADIO RECEIVER ASSY RESISTANCE Tester connection Condition Specified condition SW1 - GMD Do not switch position Approx. 100 kohm SW1 - GMD SEEK+ switch: push Approx. 0 ohm SW1 - GMD SEEK- switch: push Approx. 0.3 kohm SW1 - GMD VOL+ switch: push Approx. 1 kohm SW1 - GMD VOL- switch: push Approx. 3.2 kohm SW2 - GMD Do not switch position Approx. 100 kohm SW2 - GMD MODE switch: push Approx. 0 ohm NG: Go to step 2 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )
2. INSPECT STEERING PAD SWITCH LH(AU1,AU2,EAU) Disconnect the steering pad switch LH connector. Measure the resistance according to the values in the table below. Standard: STEERING PAD SWITCH LH (AU1,AU2,EAU) RESISTANCE Tester connection Condition Specified condition AU1 - EAU Do not switch position Approx. 100 kohm AU1 - EAU SEEK+ switch: push Approx. 0 ohm AU1 - EAU SEEK- switch: push Approx. 0.3 kohm AU1 - EAU VOL+ switch: push Approx. 1 kohm AU1 - EAU VOL- switch: push Approx. 3.2 kohm AU2 - EAU Do not switch position Approx. 100 kohm AU2 - EAU MODE switch: push Approx. 0 ohm NG: REPLACE STEERING PAD SWITCH LH (SEE «STEERING PAD SWITCH LH»(ref-226440-S26321673892006032900000) ) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSY - RADIO RECEIVER ASSY) Disconnect the connectors from the spiral cable sub-assy and radio receiver assy R23. Measure the resistance according to the values in the table below. Standard: SPIRAL CABLE SUB-ASSY - RADIO RECEIVER ASSY RESISTANCE Tester connection Specified condition SW1 - AU1 Below 1 ohm SW2 - AU2 Below 1 ohm GMD - EAU Below 1 ohm SW1 - Body ground 10 kohm or higher SW2 - Body ground 10 kohm or higher GMD - Body ground 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE SPIRAL CABLE SUB-ASSY (SEE «SPIRAL CABLE SUB-ASSY»(ref-226436-S08603358162006032900000) )

When the light control switch is in the TAIL or HEAD position, the TAILLIGHT relay activates and supplies power to illuminate the radio receiver assy panel.

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1. CHECK SYSTEM Turn the light control switch to the TAIL or HEAD position. Check if other displays or indicators such as the A/C indicator come on. OK:: Other displays or indicators come on. NG: GO TO COMBINATION METER SYSTEM (SEE «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-226394-S05184718132006032800000) ) OK: Go to next step
2. INSPECT RADIO RECEIVER ASSY (ILL+) Disconnect the connector from the radio receiver assy. Measure the voltage according to the value(s) in the table below. Standard: RADIO RECEIVER ASSY (ILL+) VOLTAGE Tester connection Condition Specified condition ILL+ - Body ground Light SW TAIL or HEAD 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSY - RADIO RECEIVER ASSY) Disconnect the connectors from the combination meter assy and radio receiver assy. Measure the resistance according to the values in the table below. Standard: COMBINATION METER ASSY - RADIO RECEIVER ASSY RESISTANCE Tester connection Specified condition ILL - ILL - Below 1 ohm ILL - Body ground 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )

This circuit sends the signal to the stereo component amplifier to mute the noise. Because of that, the noise produced by changing the sound source ceases.

In addition, this circuit is used to mute the sound when the navigation system performs voice guide.

If the vehicle is equipped with a navigation system, normal audio sound will cease, and only voice guidance will be heard from the driver's side speaker when voice guides are given.

If there is an open in the circuit, noise can be heard from the speaker when changing the sound source.

If there is a short in the circuit, even though the stereo component amplifier assy is normal, no sound or only extremely small sound can be produced.

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1. INSPECT STEREO COMPONENT AMPLIFIER ASSY Measure the voltage according to the value in the table below. Standard: STEREO COMPONENT AMPLIFIER ASSY VOLTAGE Tester connection Condition Specification MUTE-Body ground Turn ignition switch to ACC, Audio system is playing --> Changing Above 3.5 V --> Below 1 V NG: Go to step 2 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )
2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - STEREO COMPONENT AMPLIFIER ASSY) Disconnect the connectors from the radio receiver assy and stereo component amplifier assy. Measure the resistance according to the values in the table below. Standard: RADIO RECEIVER ASSY - STEREO COMPONENT AMPLIFIER ASSY RESISTANCE Tester connection Condition Specified condition MUTE - MUTE Always Below 1 ohm MUTE - Body ground Always 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK:Go To Next Step
3. REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) Replace the radio receiver assy and check if it operates normally. OK: The radio receiver assy operates normally OK: NORMAL OPERATION NG: REPLACE STEREO COMPONENT AMPLIFIER ASSY (SEE «STEREO COMPONENT AMPLIFIER ASSY»(ref-226440-S02185019462006032900000) )

The radio receiver assy controls the volume according to the LMUT signal from the multi-display controller sub-assy.

The LMUT signal is send to reduce noise and pop sound when switching mode, etc.

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1. INSPECT RADIO RECEIVER ASSY Measure the voltage according to the value in the table below. Standard: RADIO RECEIVER ASSY VOLTAGE Tester connection Condition Specification MUTE-Body ground Turn ignition switch to ACC, RSE system is playing --> Changing Above 3.5 V --> Below 1 V NG: Go to step 2 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )
2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - MULTI-DISPLAY CONTROLLER SUB-ASSY) Disconnect the connectors from the radio receiver assy and multi-display controller sub-assy. Measure the resistance according to the values in the table below. Standard: RADIO RECEIVER ASSY - MULTI-DISPLAY CONTROLLER SUB-ASSY RESISTANCE Tester connection Condition Specified condition MUTE - LMUT Always Below 1 )ohm MUTE - Body ground Always 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
3. INSPECT MULTI-DISPLAY CONTROLLER SUB-ASSY Disconnect the connectors from the multi-display controller sub-assy. Measure the resistance according to the values in the table below. Standard: MULTI-DISPLAY CONTROLLER SUB-ASSY VOLTAGE Tester connection Condition Specified condition LMUT - Body ground Turn ignition switch to ACC Above 3.5 V NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSY (SEE «MULTI-DISPLAY CONTROLLER SUB-ASSY»(ref-226440-S27413451712006032900000) )

1. When the vehicle has a built-in type amplifier, a sound signal is sent from the radio receiver assy to the speakers via the "standard type" circuit.
2. When the vehicle has a separate type amplifier, a sound signal from the radio receiver assy is amplified by the stereo component amplifier and then transmitted to the speaker via the "JBL type".

If there is a short in this circuit, the stereo component amplifier assy detects it and stops output to the speaker.

Thus sound can not be heard from the speaker even if there is no malfunction in the stereo component amplifier assy or speaker.

JBL Type

When a short in the speaker circuit is detected, all sound output is stopped.

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1. CHECK TYPE HINT: If the radio receiver assy in JBL type, "JBL" is indicated on its surface. Choose type to be inspected. CHECK TYPE Type Go to step Standard type A JBL type B B: Go to step 6 A: Go To Next Step
2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - SPEAKER ASSY) Disconnect the connectors from the radio receiver assy and speakers. Measure the resistance according to the value(s) in the table below. Standard: RADIO RECEIVER ASSY - SPEAKER ASSY SPECIFIED CONDITIONS Tester connection Specified condition FL+ - 1 (Front No.1 speaker assy LH) Below 1 ohm FL- - 2 (Front No.1 speaker assy LH) Below 1 ohm FR+ - 1 (Front No.1 speaker assy RH) Below 1 ohm FR- - 2 (Front No.1 speaker assy RH) Below 1 ohm FL+ - 1 (Front No.2 speaker assy LH) Below 1 ohm FL- - 2 (Front No.2 speaker assy LH) Below 1 ohm FR+ - 1 (Front No.2 speaker assy RH) Below 1 ohm FR- - 2 (Front No.2 speaker assy RH) Below 1 ohm RL+ - 1 (Rear speaker assy LH) Below 1 ohm RL- - 2 (Rear speaker assy LH) Below 1 ohm RR+ - 1 (Rear speaker assy RH) Below 1 ohm RR- - 2 (Rear speaker assy RH) Below 1 ohm FL+ - Body ground 10 kohm or higher FL- - Body ground 10 kohm or higher FR+ - Body ground 10 kohm or higher FR- - Body ground 10 kohm or higher RL+ - Body ground 10 kohm or higher RL- - Body ground 10 kohm or higher RR+ - Body ground 10 kohm or higher RR- - Body ground 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
3. INSPECT FRONT NO. 1 SPEAKER ASSY Resistance check Measure the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard: 4 ohm NG: REPLACE FRONT NO. 1 SPEAKER ASSY (SEE «FRONT NO.1 SPEAKER ASSY»(ref-226440-S24249928982006032900000) ) OK
4. INSPECT FRONT NO. 2 SPEAKER ASSY Check that malfunction disappears when another speaker in a good condition is installed. OK: Malfunction disappears. HINT: Connect all the connectors to the speakers. When there is a possibility that either right or left front speaker is defective, inspect by interchanging the right one and the left one. OK: REPLACE FRONT NO. 2 SPEAKER ASSY (SEE «FRONT NO.2 SPEAKER ASSY»(ref-226440-S20015959182006032900000) ) NG: Go To Next Step
5. INSPECT REAR SPEAKER ASSY Resistance check Measure the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard: 8 ohm NG: REPLACE REAR SPEAKER ASSY (SEE «REAR SPEAKER ASSY»(ref-226440-S11469051682006032900000) ) OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )
6. CHECK HARNESS AND CONNECTORS (STEREO COMPONENT AMPLIFIER ASSY - SPEAKER ASSY) Disconnect the connectors from the stereo component amplifier assy and speakers. Measure the resistance according to the values in the table below. Standard: STEREO COMPONENT AMPLIFIER ASSY - SPEAKER ASSY SPECIFIED CONDITIONS Tester connection Specified condition FL+ - 1 (Front No.1 speaker assy LH) Below 1 ohm FL- - 2 (Front No.1 speaker assy LH) Below 1 ohm FR+ - 1 (Front No.1 speaker assy RH) Below 1 ohm FR- - 2 (Front No.1 speaker assy RH) Below 1 ohm FL+ - 1 (Front No.2 speaker assy LH) Below 1 ohm FL- - 2 (Front No.2 speaker assy LH) Below 1 ohm FR+ - 1 (Front No.2 speaker assy RH) Below 1 ohm FR- - 2 (Front No.2 speaker assy RH) Below 1 ohm RL+ - 1 (Rear speaker assy LH) Below 1 ohm RL- - 2 (Rear speaker assy LH) Below 1 ohm RR+ - 1 (Rear speaker assy RH) Below 1 ohm RR- - 2 (Rear speaker assy RH) Below 1 ohm FL+ - Body ground 10 kohm or higher FL- - Body ground 10 kohm or higher FR+ - Body ground 10 kohm or higher FR- - Body ground 10 kohm or higher RL+ - Body ground 10 kohm or higher RL- - Body ground 10 kohm or higher RR+ - Body ground 10 kohm or higher RR- - Body ground 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK
7. INSPECT FRONT NO. 1 SPEAKER ASSY Resistance check Measure the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard: 2 ohm NG: REPLACE FRONT NO. 1 SPEAKER ASSY (SEE «FRONT NO.1 SPEAKER ASSY»(ref-226440-S24249928982006032900000) ) OK
8. INSPECT FRONT NO. 2 SPEAKER ASSY Check that malfunction disappears when another speaker in a good condition is installed. OK: Malfunction disappears. HINT: Connect the connector to the speaker. When there is a possibility that either right or left front speaker is defective, inspect by interchanging the right one and the left one. OK: REPLACE FRONT NO. 2 SPEAKER ASSY (SEE «FRONT NO.2 SPEAKER ASSY»(ref-226440-S20015959182006032900000) ) NG: Go To Next Step
9. INSPECT REAR SPEAKER ASSY Resistance check Measure the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard: 2 ohm NG: REPLACE REAR SPEAKER ASSY (SEE «REAR SPEAKER ASSY»(ref-226440-S11469051682006032900000) ) OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )

When the vehicle is equipped with the navigation system, a sound signal for the driver's side is sent from the stereo component amplifier to the driver's side speaker via the navigation ECU.

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1. CHECK NAVIGATION VOICE GUIDANCE Check if navigation voice guidance is heard from the speaker on the driver side. OK: Voice guidance is heard. OK: Go to step 8 NG
2. CHECK SETTING (THE VOLUME OF THE NAVIGATION VOICE SOUND) Check that "OFF" is not selected. OK: OFF is not selected. NG: USING VOICE ADJUSTMENT SWITCH, TURN THE VOICE GUIDANCE VOLUME UP OK: Go To Next Step
3. INSPECT SYSTEM Check the system. Check if sound is heard from speakers. SPEAKER SYMPTOM Symptom Proceed to No sound is heard from both speakers A No sound is heard from front No.1 speaker assy B No sound is heard from front No.2 speaker assy Replace front No.2 speaker assy (see «FRONT NO.2 SPEAKER ASSY»(ref-226440-S20015959182006032900000) ) B Go to step 6 A
4. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - FRONT NO.2 SPEAKER ASSY) Disconnect the connectors from the navigation ECU and speaker. Measure the resistance according to the values in the table below. Standard: NAVIGATION ECU - FRONT NO2 SPEAKER ASSY RESISTANCE Tester connection Condition Specified condition AUO+ - 1 Always Below 1 ohm AUO- - 2 Always Below 1 ohm AUO+ - Body ground Always 10 kohm or higher AUO- - Body ground Always 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
5. INSPECT FRONT NO. 2 SPEAKER ASSY Check that malfunction disappears when another speaker in a good condition is installed. OK: Malfunction disappears. HINT: Connect all the connectors to the speakers. When there is a possibility that either right or left front speaker is defective, inspect by interchanging the right one and the left one. OK: REPLACE FRONT NO. 2 SPEAKER ASSY (SEE «FRONT NO.2 SPEAKER ASSY»(ref-226440-S20015959182006032900000) ) NG: Go To Next Step
6. CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER ASSY - FRONT NO. 1 SPEAKER ASSY) Disconnect the connectors from the front No.2 speaker assy and front No.1 speaker assy. Measure the resistance according to the values in the table below. FRONT NO. 2 SPEAKER ASSY - FRONT NO. 1 SPEAKER ASSY RESISTANCE Tester connection Condition Specified condition 3 (Front No.2 speaker Assy) - 1 (Front No.1 speaker Assy) Always Below 1 ohm 4 (Front No.2 speaker Assy) - 2 (Front No.1 speaker Assy) Always Below 1 ohm 3 (Front No.2 speaker Assy) - Body ground Always 10 kohm or higher 4 (Front No.2 speaker Assy) - Body ground Always 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK
7. INSPECT FRONT NO. 1 SPEAKER ASSY Resistance check Measure the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard: 4 ohm NG: REPLACE FRONT NO. 1 SPEAKER ASSY (SEE «FRONT NO.1 SPEAKER ASSY»(ref-226440-S24249928982006032900000) ) OK: REPLACE NAVIGATION ECU (SEE «NAVIGATION ECU»(ref-226440-S06562104712006032900000) )
8. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - STEREO COMPONENT AMPLIFIER ASSY) Disconnect the connectors from the navigation ECU and stereo component amplifier assy. Measure the resistance according to the values in the table below. Standard: NAVIGATION ECU - STEREO COMPONENT AMPLIFIER ASSY RESISTANCE Tester connection Condition Specified condition AUI+ - FL+ Always Below 1 ohm AUI- - FL- Always Below 1 ohm AUI+ - Body ground Always 10 kohm or higher AUI- - Body ground Always 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
9. INSPECT NAVIGATION ECU Disconnect the connector from the navigation ECU. Measure the resistance according to the values in the table below. Standard: NAVIGATION ECU RESISTANCE Tester connection Condition Specified condition AUI+ - AUO+ Always Below 1 ohm AUI- - AUO- Always Below 1 ohm NG: REPLACE NAVIGATION ECU (SEE «NAVIGATION ECU»(ref-226440-S06562104712006032900000) ) OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )

The radio receiver assy sends a sound signal to the stereo component amplifier assy through this circuit.

The sound signal that has been sent is amplified by the stereo component amplifier assy, and then is sent to the speaker.

If there is an open or short in the circuit, sound can not be heard from the speaker even if there is no malfunction in the stereo component amplifier assy or speaker.

Scheme 75

Scheme 76

Scheme 77

1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - STEREO COMPONENT AMPLIFIER ASSY) Disconnect the connectors from the radio receiver assy and stereo component amplifier assy. Measure the resistance according to the values in the table below. Standard: RADIO RECEIVER ASSY - STEREO COMPONENT AMPLIFIER ASSY RESISTANCE Tester connection Specified condition FL+ - F.L Below 1 ohm FR+ - F.R Below 1 ohm RL+ - R.L Below 1 ohm RR+ - R.R Below 1 ohm FL+ - Body ground 10 kohm or higher FR+ - Body ground 10 kohm or higher RL+ - Body ground 10 kohm or higher RR+ - Body ground 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )

The multi-display controller sub-assy sends a sound signal to the radio receiver assy through this circuit.

The sound signal that has been sent is amplified by the stereo component amplifier assy, and then is sent to the speaker.

If there is an open or short in the circuit, sound can not be heard from the speaker even if there is no malfunction in the stereo component amplifier assy or speaker.

Scheme 78

Scheme 79

Scheme 80

1. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROLLER SUB-ASSY - RADIO RECEIVER ASSY) Disconnect the connectors from the radio receiver assy and multi-display controller sub-assy. Measure the resistance according to the values in the table below. Standard: MULTI-DISPLAY CONTROLLER SUB-ASSY - RADIO RECEIVER ASSY RESISTANCE Tester connection Specified condition R+ - R+ Below 1 ohm R- - R- Below 1 ohm L+ - L+ Below 1 ohm L- - L- Below 1 ohm R+ - Body ground 10 kohm or higher R- - Body ground 10 kohm or higher L+ - Body ground 10 kohm or higher L- - Body ground 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )

INSPECTION PROCEDURE

1. ADJUST SOUND QUALITY Adjust the sound quality. Operate the radio receiver assy to adjust the sound quality. OK: Malfunction disappears. OK: BAD SOUND QUALITY NG: Go To Next Step
2. COMPARE IT WITH ANOTHER VEHICLE OF SAME MODEL Compare it with another vehicle of the same model. Compare it with the vehicle of the same type which does not have a trouble to see if there is any difference in the sound quality. OK: No difference is found. OK: SETTING NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )

1. CHECK OF SPEAKER INSTALLATION Check the speaker installation condition. Check that each speaker is securely installed. OK: Malfunction disappears. HINT: The radio is equipped with a noise prevention system that blocks only excessively loud noise. If loud noise occurs, check whether or not the ground on the antenna installation part and the proper noise-prevention equipment are all installed, and whether or not there is improper wiring. NOISE OCCURRING CONDITIONS Condition in which noise occurs Noise type Depressing the acceleration pedal increases the noise, and stopping the engine stops the noise immediately. Alternator noise Noise occurs during A/C or the heater operation. Blower motor noise Rapid acceleration during the drive on an unpaved road or after the ignition 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 Quiet noise is heard while the engine is running, but stops with the engine. Ignition noise Noise occurs in turn with the blink of the turn signal flash. Flasher noise Noise occurs during window washer operation. Washer noise Noise occurs while the engine is running, and it continues even after the engine is stopped. Water temperature sensor noise Noise occurs during wiper operation. Wiper noise Noise occurs when the brake pedal is depressed. Stop light switch noise Others Static electricity on the vehicle HINT: Identify the condition in 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 difficult and leads to misdiagnosis. The noise should be removed in descending order of loudness. NG: INSTALL IT PROPERLY OK: IDENTIFICATION OF NOISE SOURCE

Scheme 81

Scheme 82

Scheme 83

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. OK: The radio auto-search functions properly. OK: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) 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 such as the sun shade film and the telephone antenna is installed. OK: Optional component is installed. OK: EFFECT FROM OPTIONAL COMPONENT NG: Go To Next Step
3. INSPECT RADIO RECEIVER ASSY (ANTENNA) Preparation for Check Remove the antenna plug of the radio receiver assembly. Noise Check With the radio receiver assy connector connected, turn the ignition switch to the ACC position. Turn on the radio and choose the AM mode. Place a flat-head screwdriver or a piece of metal such as thin wire on an antenna jack of the radio receiver assy and check that the noise is heard from the speaker. OK: Noise occurs. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: Go To Next Step
4. CHECK ANTENNA TYPE Choose type to be inspected. ANTENNA TYPE CHECK Type Go to step Glass printed type antenna A Fender type antenna B B: Go to step 7 A: Go To Next Step
5. CHECK ANTENNA ASSY Check for continuity of the antenna. HINT: Inspect the continuity, at the center of each antenna wire, as shown in the illustration. NOTE: When cleaning the glass, use a soft dry cloth, and wipe the glass in the direction of the wire. Take care not to damage the wires. Do not use detergents or glass cleaners with abrasive ingredients. When measuring voltage, wind a piece of tin foil around the top of the negative probe and press the foil against the wire with your finger, as shown in the illustration. OK: There is continuity in the antenna. NG: REPAIR ANTENNA ASSY (SEE «WINDOW GLASS (ANTENNA WIRE)»(ref-226440-S25421406622006032900000) ) OK: Go To Next Step
6. REPLACE AMPLIFIER ANTENNA ASSY (SEE «AMPLIFIER ANTENNA ASSY»(ref-226440-S40425028202006032900000) OR 67-16) Replace the amplifier antenna assy and check if it operates normally. OK: The amplifier antenna assy operates normally. OK: NORMAL OPERATION NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) )
7. CHECK ANTENNA ASSY Check that the antenna is securely installed. OK: The antenna is installed properly. OK: Go to step 6 NG: INSTALL THE ANTENNA ASSY PROPERLY

Scheme 84

1. CHECK IF A NORMAL CD IS INSERTED Check if a normal CD is inserted. Make sure that the CD is a normal audio CD, and that there is no deformation, flaw, stain, burr or other defects on the CD. OK: Normal audio CD. Reference: Translucent or oddly-shaped CD cannot be played. Computer CD-ROMs (even those with music) and CD-R discs cannot be played. Playing an 8 cm CD does not require an adapter. NG: CD FAULTY OK: Go To Next Step
2. CHECK IF A CD IS INSERTED PROPERLY Check if a CD is inserted properly. Check whether or not the CD is inserted upside down. OK: Not upside down. NG: SET DISC CORRECTLY OK: Go To Next Step
3. DISC CLEANING Disc cleaning If the disc gets dirty, clean the disc 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: Malfunction disappears. OK: DISC DIRTY NG: Go To Next Step
4. REPLACE CD WITH ANOTHER AND RECHECK Replace the CD with another and recheck. Replace the CD with another normal one to see if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: CD FAULTY

1. PRESS "EJECT" AND CHECK OPERATION Press "EJECT" and check the operation. Press the CD EJECT switch of the radio receiver assembly for 2 seconds or more to see if the CD is ejected. OK: CD is ejected. Reference: If the CD is not ejected, bring the vehicle in for repair. Do not attempt to remove it by force. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: Go To Next Step
2. CHECK IF A PROPER CD IS INSERTED Check that a normal audio CD is inserted. Check in what conditions the sound skipping occurs. OK: Driving on a bad road. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK
3. REPLACE CD WITH ANOTHER AND RECHECK Replace the CD with another and recheck. Check the installation condition of the radio receiver assembly. OK: Installed properly. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: CD FAULTY

1. REPLACE CD WITH ANOTHER AND RECHECK Replace the CD with another one and recheck. Check the installation condition of the radio receiver assembly. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: CD FAULTY

Scheme 85

1. DISC CLEANING Disc cleaning If the disc gets dirty, clean the disc by wiping the surface from the center to outside in a radial direction with a soft cloth. NOTE: Do not use a conventional record cleaner or anti-static preservative. OK: Malfunction disappears. OK: DISC DIRTY NG: Go To Next Step
2. REPLACE CD WITH ANOTHER AND RECHECK Replace the CD with another and recheck. Replace the CD with another normal one to see if the same trouble occurs again. OK: Malfunction disappears. OK: CD FAULTY NG: Go To Next Step
3. CHECK WHEN THIS HAPPENS Check when this happens. Check under what conditions (places) noise occurs. OK: Driving on a bumpy road. OK: Go to step 5 NG
4. COMPARE IT WITH ANOTHER CAR OF SAME MODEL Compare it with another vehicle of the same model. Compare it with the vehicle of the same type which does not have a trouble to see if there is any difference in the CD sound. OK: No difference found. OK: SETTING NG
5. CHECK OF RADIO RECEIVER ASSEMBLY INSTALLATION Check the radio receiver assembly installation condition. Check that the radio receiver assembly is installed properly. OK: Installed properly. NG: INSTALL THE RADIO RECEIVER ASSEMBLY PROPERLY OK: Go To Next Step
6. DID TEMPERATURE IN CABIN CHANGE RAPIDLY? Did the temperature in the cabin change rapidly? Check whether or not the rapid temperature change occurred in the cabin. OK: The rapid temperature change occurred. Reference: The rapid temperature change creates condensation inside the CD player, which may prevent the CD from being played. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: CONDENSATION DUE TO TEMPERATURE CHANGE (LEAVE IT AS IT IS FOR A WHILE BEFORE USING)

1. CHECK FOR ANY FOREIGN OBJECT Check for any foreign objects. Check that no foreign objects or defects are detected in the cassette tape player of the radio receiver assembly. OK: No foreign objects or defects are 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 with music or voice recorded. OK: Proper cassette tape with music or voice recorded. NG: CASSETTE TAPE FAULTY OK: Go To Next Step
3. REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK Replace the cassette tape with another one and recheck. Replace the cassette tape with another normal one to see if the same trouble occurs again. OK: The function returns to be normal. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: CASSETTE TAPE FAULTY

1. PRESS "EJECT" AND CHECK OPERATION Press "EJECT" and check the operation Press the cassette tape EJECT switch of the radio receiver assembly for 2 seconds or more and check that the cassette tape is ejected. OK: The cassette tape is ejected. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: Go To Next Step
2. CHECK CASSETTE TAPE Check the cassette tape. Check that the ejected cassette tape does not have a peeled label, a cassette body deformation or any other defects. OK: No fault on the cassette tape. NG: CASSETTE TAPE FAULTY OK
3. REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK Replace the cassette tape with another and recheck. Replace the cassette tape with another normal one to see if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: CASSETTE TAPE FAULTY

Scheme 86

1. REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK Replace the cassette tape with another one and recheck. Replace the cassette tape with another normal one to see if the same trouble occurs again. OK: Malfunction disappears. OK: CASSETTE TAPE FAULTY NG: Go To Next Step
2. CHECK FOR ANY FOREIGN OBJECT Check for foreign objects. Check that no foreign objects or defects are detected in the cassette tape player. OK: No foreign objects or defects are detected. NG: REMOVE FOREIGN OBJECT OK
3. CLEAN HEAD AND CHECK OPERATION Head cleaning Raise the cassette door with your finger. 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 if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: HEAD DIRTY

Scheme 87

1. CHECK FOR ANY FOREIGN OBJECT Check for any foreign objects. Check that no foreign objects or defects are detected in the cassette tape player of the radio receiver assy. OK: No foreign objects or defects are 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 one and recheck. Replace the cassette tape with another normal one (90 minutes, or less) to see if the same trouble occurs again. OK: Malfunction disappears. OK: CASSETTE TAPE FAULTY NG: Go To Next Step
3. CLEAN HEAD AND CHECK OPERATION Head cleaning Raise the cassette door with your finger. 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 if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK: HEAD DIRTY

Each unit of the radio receiver system connected to AVC-LAN (communication bus) communicates by transferring the signals from each switch.

When +B short and GND short occur in this AVC-LAN, radio receiver system will not function normally as communication is discontinued.

In AVC-LAN, radio receiver assy becomes the communication master, and the radio receiver assy has enough resistance necessary for transmitting the communication.

Scheme 88

Scheme 89

Scheme 90

Scheme 91

1. INSPECT RADIO RECEIVER ASSY Measure the resistance according to the value(s) in the table below. Standard: RADIO RECEIVER ASSY RESISTANCE Tester connection Condition Specified condition TX1+ - TX1- Always 60 to 80 ohm NG: REPLACE RADIO RECEIVER ASSY (SEE «RADIO RECEIVER ASSY»(ref-226440-S03604239242006032900000) ) OK
2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROLLER SUB-ASSY - RADIO RECEIVER ASSY) Disconnect the connectors from the multi-display controller sub-assy R29 and radio receiver assy R23. Measure the resistance according to the value(s) in the table below. Standard: (MULTI-DISPLAY CONTROLLER SUB-ASSY - RADIO RECEIVER ASSY RESISTANCE Tester connection Condition Specified condition TX+ - TX1+ Always Below 1 ohm TX- - TX1- Always Below 1 ohm TX+ - Body ground Always 10 kohm or higher TX- - Body ground Always 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-226391-S18454874492006032800000) )