Audio System - Diagnostics: Diagnosis Lexus GX J120

HOW TO PROCEED WITH TROUBLESHOOTING

1. VEHICLE BROUGHT TO WORKSHOP Go to next step.
2. CUSTOMER PROBLEM ANALYSIS (SEE «CUSTOMER PROBLEM ANALYSIS CHECK»(ref-228760-S37719392132006041100000) ) Go to next step.
3. CHECK AND CLEAR DTC (SEE «PRE-CHECK»(ref-228760-S26529994082006041100000) ) Go to next step.
4. PROBLEM SYMPTOM CONFIRMATION SYMPTOM OCCURS (GO TO STEP 6 .) SYMPTOM DOES NOT OCCUR (GO TO STEP 5 )
5. SYMPTOM SIMULATION (SEE «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-228746-S10052866652006041000000) ) Go to next step.
6. DTC CHECK (SEE «PRE-CHECK»(ref-228760-S26529994082006041100000) ) HINT: If the audio system is equipped with a multi-display, check DTCs in the LEXUS NAVIGATION SYSTEM article (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-228761-S12878184852006041100000) ). MALFUNCTION CODE (GO TO STEP 7 ) NORMAL CODE (GO TO STEP 8 .)
7. SEE «DIAGNOSTIC TROUBLE CODE TABLE»(ref-228760-S31330577572006041100000) ) GO TO STEP 9 .
8. SEE «PROBLEM SYMPTOMS TABLE»(ref-228760-S41458227772006041100000) Go to next step.
9. CIRCUIT INSPECTION (SEE «POWER SOURCE CIRCUIT (RADIO RECEIVER ASSY)»(ref-228760-S22639805832006041100000) - «TAPE IS TANGLED DUE TO INCORRECT TAPE SPEED OR AUTO-REVERSE MALFUNCTION»(ref-228760-S28550710132006041100000) ) Go to next step.
10. CONFIRMATION TEST Go to next step.

END

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1. DIAGNOSIS CHECK Starting Diagnosis Mode (All elements are lighting 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 "DISC" 3 times. Reference: When the system enters the Diagnosis Mode, a beep sound is emitted 3 times and all the elements come on in SW check mode. It may take about 40 sec. to complete the check. Turn all the elements in the LCD on. When pressing the switch, confirm a beep sound is emitted. Pressing the "SEEK TRACK UP" button switches the display 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 DESCRIPTION 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 PHYSICAL ADDRESS LIST Code No. (physical address) Equipment name 190 Radio receiver assy (Audio head unit) 440 Stereo component amplifier 1F6, 16C Multi-display controller sub-assy 1F4 Stereo component controller assy Finishing Diagnosis Mode. Press "DISC" button 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 DISPLAY DESCRIPTION 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 DTCs for "Exchange" are 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 DTCs for "Check" are 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. 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 "SEEK TRACK" 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. HINT: A 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.) HINT: A beep sound is given once when the DTC memory is completely cleared. When DTC memory for all the devices 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 conditions under which the noise occurs, and check the noise filter on the relevant part. NOISE SOURCE DESCRIPTION Condition under which noise occurs Noise Source Noise increases when the accelerator pedal is depressed, but stops when the engine is stopped. Generator Noise occurs during A/C or heater operation. Blower motor Noise occurs when the vehicle accelerates rapidly on an unpaved road or after the ignition switch is turned on. Fuel pump Noise occurs when the horn switch is pressed and released or when pressed and held. Horn Quiet noise occurs while the engine is running, but stops when the engine is stopped. Ignition Noise occurs synchronously with the blink of the turn signal. Flasher Noise occurs during window washer operation. Washer Noise occurs while the engine is running, and continues even after the engine is stopped. Water temperature sensor Noise occurs during wiper operation. Wiper Noise occurs when the brake pedal is depressed. Stop light switch Others Static electricity stored on the vehicle HINT: First ensure that the noise is not coming from the outside. Failure to do so makes noise source detection difficult and may lead to a misdiagnosis. Noise should be removed in descending order of loudness. Tuning the radio so that no station is received makes the noise more noticeable, making the recognition of the phenomenon easier.

DIAGNOSTIC TROUBLE CODE TABLE

DIAGNOSTIC TROUBLE CODE TABLE

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1. RADIO RECEIVER ASSY (Physical address: 190) HINT: *1: Even if no failure is detected, this trouble code may be stored depending on the battery condition or voltage for starting the engine. *2: It is stored when 180 sec. have 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. have 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: 21 (Switch) Logical address: 61 (Cassette switch)
2. STEREO COMPONENT AMPLIFIER ASSY (Physical address: 440) 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: This code may be stored when the engine key is turned again 1 min. after the engine starts. *3: This code may be stored when the engine key is turned again after the engine starts. *4: When 210 sec. have 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. MULTI-DISPLAY CONTROLLER SUB-ASSY (Physical address: 1F6, 16C) 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: This code is stored when 180 sec. have passed after the power supply connector is pulled out after engine start. Main (1F6) Logical address: 01 (Communication control) Sub (16C)-AVC-LAN L-1 Logical address: 01 (Communication control)
4. STEREO COMPONENT CONTROLLER ASSY (Physical address: 1F4) 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: When 210 sec. have passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored. *3: This code may be stored when the engine key is turned 1 min. again after the engine starts. *4: This code may be stored when the engine key is turned again after the engine starts. Logical address: 01 (Communication control)

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1. RADIO RECEIVER ASSY
2. STEREO COMPONENT AMPLIFIER

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INSPECTION PROCEDURE

1. CHECK OF SPEAKER INSTALLATION Check the speaker installation condition. Check that each speaker is securely installed. Standard: Malfunction disappears. HINT: The radio is equipped with a noise prevention system that blocks excessively loud noise. If such noise occurs, check that all wiring is proper and that the antenna installation part ground and noise-prevention equipment are installed. MALFUNCTION DISAPPEARS Conditions under which noise occurs Noise type Noise increases when the accelerator pedal is depressed, but stops when the engine is stopped. Generator noise Noise occurs during A/C or heater operation. Blower motor noise Noise occurs when the vehicle accelerates rapidly on an unpaved road or after the ignition switch is turned on. Fuel pump noise Noise occurs when the horn switch is pressed and released or when pressed and held. Horn noise Quiet noise occurs while the engine is running, but stops when the engine is stopped. Ignition noise Noise occurs synchronously with the blink of the turn signal. Flasher noise Noise occurs during window washer operation. Washer noise Noise occurs while the engine is running, and 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 conditions under which the noise occurs, and check the noise filter on the relevant part. First ensure that the noise is not coming from the outside. Failure to do so makes noise source detection difficult and may lead to a misdiagnosis. Noise should be removed in descending order of loudness. NG: INSTALL IT PROPERLY OK: IDENTIFICATION OF NOISE SOURCE

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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. 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 is 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 assy 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 assy and check that the noise is 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 IF A PROPER CD IS INSERTED Check if 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 the 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 IS 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 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: DISC IS 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 disappears. OK: CD IS FAULTY NG: CHECK AND REPLACE RADIO RECEIVER ASSY

1. CHECK IF RADIO AUTO-SEARCH FUNCTIONS PROPERLY Check if the radio auto-search functions properly. Perform the auto-research of the radio and check that the operation is normal. Standard: Malfunction disappears. NG: CHECK AND REPLACE RADIO RECEIVER ASSY 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 and check that 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: While driving on the bad road. NG: CHECK AND REPLACE RADIO RECEIVER ASSY 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: CHECK AND REPLACE RADIO RECEIVER ASSY NG: CHECK AND REPLACE RADIO RECEIVER ASSY

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 disappears. OK: CD IS FAULTY NG: CHECK AND REPLACE RADIO RECEIVER ASSY

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1. 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. Standard: Malfunction disappears. OK: DISC IS 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 disappears. OK: CD IS FAULTY NG: Go to next step.
3. CHECK WHEN THIS HAPPENS Check when this problem happens. Check when noise occurs. Standard: While driving on the bumpy road. OK: Go to step 5 . NG: Go to next step.
4. COMPARE IT WITH ANOTHER VEHICLE 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 is 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 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. Standard: The rapid temperature change occurred. Reference: The rapid temperature change creates condensation inside the CD player, causing CD not to be played. 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 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 or defect is 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. Standard: Proper cassette tape with music or voice recorded. NG: CASSETTE TAPE IS 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 faulty cassette tape with a normal one to see if the same trouble occurs again. Standard: The function is recovered to normal. OK: CASSETTE TAPE IS 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 normal. NG: CHECK AND REPLACE RADIO RECEIVER ASSY OK: NORMAL

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 the operation is normal. Standard: Malfunction disappears. NG: CHECK AND REPLACE RADIO RECEIVER ASSY 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 peeled, cassette body deformation and other defects. Standard: No fault on the cassette tape. NG: CASSETTE TAPE IS 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 a normal one to see if the same trouble occurs again. Standard: Malfunction disappears. OK: CASSETTE TAPE IS FAULTY NG: CHECK AND REPLACE RADIO RECEIVER ASSY

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1. REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK Replace the cassette tape with another one and recheck. Replace the faulty cassette tape with a normal one to see if the same trouble occurs again. Standard: Malfunction disappears. OK: CASSETTE TAPE IS 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 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 if the same trouble occurs again. OK: HEAD IS 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 or trouble is detected in the radio receiver assembly cassette tape player. Standard: No foreign material or trouble is 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 faulty cassette tape with a normal one (90 min or less) to see if the same trouble occurs again. Standard: Malfunction disappears. OK: CASSETTE TAPE IS 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 if the same trouble occurs again. OK: HEAD IS DIRTY NG: CHECK AND REPLACE RADIO RECEIVER ASSY