Home ReviewsRefund
Home/Lexus/IS/Lexus IS II facelift (2008-2010)/Repair manual/Entertainment Systems/Audio / Visual (Diagnostic Codes & Circuit Tests): Other
Contents Wiring diagrams Section: Entertainment Systems All sections

Audio / Visual (Diagnostic Codes & Circuit Tests): Other Lexus IS II facelift

Entertainment Systems 3 illustrations ~4537 words

PROCEDURE

  1. REPLACE RADIO RECEIVER NEXT --> END
  1. CHECK "RADIO RECEIVER COMMUNICATION ERROR" IN FLOW CHART Refer to the radio receiver communication error. Refer to «Radio Receiver Communication Error»(ref-387470-S34074493162011022400000) . NEXT --> END
  1. CHECK FOR DTC OF OTHER COMPONENTS Check if the component shown by the sub-code is displayed in the check result of the other components. Check if "01-DC" is output for the other components. If "01-DC" is output for any other components, check if the same physical address is displayed. Result Result Proceed to "01-DC" is output and the same physical address is displayed A "01-DC" is not output or the same physical address is not displayed B HINT: For the list of the components shown by sub-codes, refer to «COMPONENT TABLE»(ref-387470-S03554805572011022400000) . B --> See step 4 A: Go to next step
  2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component which has stored this code. COMPONENT TABLE: Component Physical address Gateway ECU 1C6 Stereo component amplifier 440 Integration control & panel assembly 1D8 Radio receiver 190 HINT: "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration. For details of the DTC display, refer to "DTC CHECK/CLEAR". Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  3. CHECK COMPONENT WHICH HAS STORED THIS CODE Select the component which has stored this code. COMPONENT TABLE: Component Proceed to Gateway ECU Gateway ECU communication error. Refer to «Gateway ECU Communication Error»(ref-387470-S06060922832011022400000) Stereo component amplifier Stereo component amplifier communication error. Refer to «Stereo Component Amplifier Communication Error»(ref-387470-S13697572172011022400000) Integration control & panel assembly Integration control & panel assembly communication error. Refer to «Integration Control and Panel Assembly Communication Error»(ref-387470-S18240323162011022400000) Radio receiver Radio receiver communication error. Refer to «Radio Receiver Communication Error»(ref-387470-S34074493162011022400000) NEXT --> END
  4. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . HINT: If "01-DC" is output for only one component, this may not indicate a malfunction. NEXT: Go to next step
  5. RECHECK DTC Recheck for DTCs and check if the same trouble code occurs again. OK Malfunction disappears. NG --> See step 3 OK --> END
  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT Refer to the radio receiver power source circuit. Refer to «Radio Receiver Power Source Circuit»(ref-387470-S13165570202011022400000) . If the power source circuit is operating normally, proceed to the next step. NEXT: Go to next step
  2. INSPECT RADIO RECEIVER Disconnect the radio receiver connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition ATX+ - ATX- Always 60 to 80 ohms TXM+ - TXM- Always 60 to 80 ohms TX+ - TX- Always 60 to 80 ohms NG --> REPLACE RADIO RECEIVER OK: Go to next step
  3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component which has stored this code. COMPONENT TABLE Component Physical address Gateway ECU 1C6 Stereo component amplifier 440 Integration control & panel assembly 1D8 HINT: "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration. For details of the DTC display, refer to "DTC CHECK/CLEAR". Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) HINT: For details of the connectors, refer to the "TERMINALS OF ECU". Refer to «TERMINALS OF ECU»(ref-387469-S02295999392011022400000) . Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component which has stored this code. Disconnect all connectors between the radio receiver and the component which has stored this code. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this code. OK There is no open or short circuit. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. REPLACE RADIO RECEIVER Replace the radio receiver with a normal one and check if the same problem occurs again. OK Same problem does not occur. NG --> REPLACE COMPONENT WHICH HAS STORED THIS CODE OK --> END
  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT Refer to the radio receiver power source circuit. Refer to «Radio Receiver Power Source Circuit»(ref-387470-S13165570202011022400000) . If the power source circuit is operating normally, proceed to the next step. NEXT: Go to next step
  2. INSPECT RADIO RECEIVER Disconnect the radio receiver connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition ATX+ - ATX- Always 60 to 80 ohms TXM+ - TXM- Always 60 to 80 ohms TX+ - TX- Always 60 to 80 ohms NG --> See step 5 OK: Go to next step
  3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component which has stored this code. COMPONENT TABLE: Component Physical address Gateway ECU 1C6 Stereo component amplifier 440 Integration control & panel assembly 1D8 HINT: "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration. For details of the DTC display, refer to the "DTC CHECK/CLEAR". Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) HINT: For details of the connectors, refer to the "TERMINALS OF ECU". Refer to «TERMINALS OF ECU»(ref-387469-S02295999392011022400000) . Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component which has stored this code. Disconnect all connectors between the radio receiver and the component which has stored this code. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this code. OK There is no open or short circuit. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. REPLACE RADIO RECEIVER Replace the radio receiver with a normal one and check if the same problem occurs again. OK Same problem does not occur. NG --> REPLACE COMPONENT WHICH HAS STORED THIS CODE OK --> END
  1. REPLACE RADIO RECEIVER NEXT --> END
  1. REPLACE RADIO RECEIVER NEXT --> END
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  2. RECHECK DTC Recheck for DTCs and check if the same trouble occurs again. HINT: If DTCs are detected frequently, replace the radio receiver. OK Malfunction disappears. NG --> REPLACE RADIO RECEIVER OK --> END
  1. REPLACE RADIO RECEIVER NEXT --> END
  1. CHECK IF A PROPER CD IS INSERTED Make sure that the CD is an audio CD or a CD with an MP3 or WMA file, and that it is not deformed, flawed, stained, burred, or otherwise defective. OK Normal CD HINT: Translucent or uniquely-shaped CDs cannot be played. CDs with adhesive paper labels should not be played. Commercial audio CDs can be played. CD-DA files on CD-ROMs, CD-Rs, and CD-RWs can be played. MP3 and WMA files on CD-ROMs, CD-Rs, and CD-RWs can be played. For details on playable CDs, refer to the Owner's Service Information. NG --> CD IS FAULTY OK: 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. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . Recheck for DTCs and check if the same trouble occurs again. OK Malfunction disappears. NG --> REPLACE RADIO RECEIVER OK --> END
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  2. RECHECK DTC Recheck for DTCs and check if the same trouble occurs again. HINT: If DTCs are detected frequently, replace the radio receiver. OK Malfunction disappears. NG --> REPLACE RADIO RECEIVER OK --> END
  1. CHECK RADIO RECEIVER Check if a disc can be changed, inserted, or ejected normally. OK Malfunction disappears. NG --> REPLACE RADIO RECEIVER OK --> END
  1. CHECK THAT CD IS INSERTED PROPERLY Check that the CD is not inserted upside down. OK CD is properly inserted. NG --> INSERT CD PROPERLY OK: Go to next step
  2. CHECK DISC Check that the disc is not deformed or cracked. OK No deformation or cracks on the disc. NG --> CHANGE DISC OK: Go to next step
  3. DISC CLEANING Disc cleaning If dirt is on the disc surface, wipe it clean with a soft cloth from the inside to the outside in a radial direction NOTE: Do not use a conventional record cleaner or anti-static preservative. NEXT: Go to next step
  4. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  5. RECHECK DTC Recheck for DTCs and check if the same trouble occurs again. OK Malfunction disappears. OK --> END NG: Go to next step
  6. REPLACE DISC WITH ANOTHER AND RECHECK Replace the disc with another and recheck. Replace the disc with another normal one. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . Recheck for DTCs and check if the same trouble occurs again. OK Malfunction disappears. NG --> REPLACE RADIO RECEIVER OK --> END
  1. CHECK RADIO RECEIVER Park the vehicle in an cool place. Check that the temperature of the radio receiver becomes sufficiently low, then start the engine. DTC clear and recheck. Check if DTC 63-47 is output. OK DTC 63-47 is not output. NG --> REPLACE RADIO RECEIVER OK --> END
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  2. RECHECK DTC Recheck for DTCs and check if the same trouble code occurs again. OK Malfunction disappears. NG --> REPLACE RADIO RECEIVER OK --> END
  1. CHANGE DISC Insert a disc with a playable file and check if the disc can be played correctly. HINT: For details on playable files and discs, refer to the Owner's Service Information. OK The disc can be played correctly. NG --> REPLACE RADIO RECEIVER OK --> DISC IS FAULTY
  1. NOISE CONDITION Check in which direction the noise comes from (front left or right, or rear left or right). Check in which direction the noise comes from. OK The location of the noise source can be determined. NG --> See step 3 OK: Go to next step
  2. CHECK SPEAKERS Check the installation conditions of the speaker units that are located near the noise source and that there are no cracks, scratches, deformation, or other failures. Result Condition Proceed to A speaker is installed incorrectly A Foreign objects are in the speaker B A speaker cone paper is broken C No malfunction is found D C --> REPLACE SPEAKER B --> REMOVE FOREIGN OBJECT A --> REINSTALL SPEAKER D: Go to next step
  3. CHECK NOISE CONDITIONS Check the noise condition. HINT: The radio has a noise prevention function to reduce noise when listening to the radio. If a loud noise occurs, check whether the ground at the antenna mounting base and the noise prevention unit are installed and wired correctly. Conditions 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 engine switch is turned on (IG). Fuel pump Noise occurs when the horn switch is pressed and released or when pressed and held. Horn 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 HINT: In the chart's left column, find the situation that matches the customer's complaint. Then, in the right column, find the part that is causing the noise. Check the noise filter on or for the part. To save time and avoid a misdiagnosis, first make sure that the noise is not coming from outside the vehicle. Noise should be removed in descending order of loudness. Setting the radio to a frequency where no signal is received may make recognition of the noise problem easier. OK The noise source can be determined. NG --> REPAIR OR REPLACE NOISE SOURCE OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387469-S35495030182011022400000)
  1. CHECK VEHICLE CONDITION Check that conditions in the cabin are not likely to cause condensation. HINT: This problem occurs when the cabin is humid and the temperature changes rapidly. This may produce condensation, resulting in a short circuit. OK Condensation is not likely to be produced. NG --> DRY OUT CABIN AND RECHECK CONDITION OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387469-S35495030182011022400000)
  1. CHECK RADIO RECEIVER Check radio receiver setting. Check that the volume is not set to "0". Check that "MUTE" is off. OK The volume is not set to "0" and "MUTE" is off. OK --> END NG --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387469-S35495030182011022400000)
  1. REPLACE CD WITH ANOTHER AND RECHECK Replace the CD with another one and recheck. Check if the problem recurs using another CD. OK Malfunction disappears. NG --> REPLACE RADIO RECEIVER OK --> END
  1. CHECK OPERATION Press the CD EJECT switch of the radio receiver for 2 seconds or more and check that the CD is ejected. OK CD is ejected. NG --> REPLACE RADIO RECEIVER OK: Go to next step
  2. REPLACE CD WITH ANOTHER AND RECHECK Insert another CD and check if it is ejected. OK CD is ejected. NG --> REPLACE RADIO RECEIVER OK --> END
  1. CHECK IF A PROPER CD IS INSERTED Make sure that the CD is an audio CD or a CD with an MP3 or WMA file, and that it is not deformed, flawed, stained, burred, or otherwise defective. OK Normal CD. HINT: Translucent or uniquely-shaped CDs cannot be played. CDs with adhesive paper labels should not be played. Commercial audio CDs can be played. CD-DA files on CD-ROMs, CD-Rs, and CD-RWs can be played. MP3 and WMA files on CD-ROMs, CD-Rs, and CD-RWs can be played. For details on playable CDs, refer to the Owner's Service Information. NG --> CHANGE DISC OK: Go to next step
  2. CHECK THAT CD IS INSERTED PROPERLY Check whether or not the CD is inserted upside down. OK CD is properly inserted. NG --> INSERT CD PROPERLY OK: Go to next step
  3. CHECK CD Clean the disc by wiping it with a soft cloth from the inside to the outside in a radial direction. OK Malfunction disappears. NOTE: Do not use a conventional record cleaner or anti-static preservative. NG --> See step 4 OK --> END
  4. REPLACE CD WITH ANOTHER AND RECHECK Replace the CD with a normal one and check that the malfunction disappears. OK Malfunction disappears. NG --> REPLACE RADIO RECEIVER OK --> END
  1. CHECK CD Check the CD. OK The CD is clean. HINT: If dirt is on the CD surface, wipe it clean with a soft cloth from the inside to the outside in a radial direction. NOTE: Do not use a conventional record cleaner or anti-static preservative. NG --> CLEAN CD OK: Go to next step
  2. CHECK CD Check that the CD is not deformed or cracked. OK No deformation or cracks on the CD. NG --> CHANGE DISC OK: Go to next step
  3. CHECK OPERATION USING ANOTHER CD Check using another CD. Check if the problem recurs using another CD. OK The problem does not occur. OK --> END NG: Go to next step
  4. CHECK RADIO RECEIVER Check the radio receiver installation condition. Check that the radio receiver is properly installed. OK Radio receiver is properly installed. NG --> REINSTALL RADIO RECEIVER PROPERLY OK --> REPLACE RADIO RECEIVER

Scheme 162

Scheme 162: PROCEDURE
Scheme 162: PROCEDURE

Scheme 163

Scheme 163
Scheme 163

Scheme 164

Scheme 164
Scheme 164
  1. CHECK RADIO RECEIVER Check the radio's automatic station search function. Move the vehicle to a location where radio wave reception is possible. Check the radio's automatic station search function by activating it. OK The radio's automatic station search function works properly. OK --> REPLACE RADIO RECEIVER NG: Go to next step
  2. INSPECT RADIO RECEIVER Disconnect the radio receiver connector J66. Measure the voltage according to the value(s) in the table below. Standard voltage Tester connection Condition Specified condition ANT - Body ground Engine SW on (IG), Radio SW ON 10 to 14 V NG --> REPLACE RADIO RECEIVER OK: Go to next step
  3. CHECK OPTIONAL COMPONENTS Check optional components (sun-shade film, telephone antenna, etc.). Check if any optional components, such as sun-shade film or telephone antenna that may decrease reception capacity, are installed. OK Optional components are installed. NOTE: Do not remove any optional components installed by the customer without his or her consent. OK --> REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE) NG: Go to next step
  4. CHECK RADIO RECEIVER Preparation for check Remove the antenna plug from the radio receiver. Check for noise Turn the engine switch on (ACC) with the radio receiver connector connected. Turn the radio on and put into AM mode. Place a screwdriver, thin wire, or other metal object on the radio receiver's antenna jack and check that noise can be heard from the speaker. OK Noise occurs. NG --> REPLACE RADIO RECEIVER OK: Go to next step
  5. CHECK GLASS ANTENNA Check for continuity of the antenna. HINT: Check for continuity at the center of each antenna wire as shown in the illustration. NOTE: When cleaning the glass, wipe it in the direction of the wire with a soft dry cloth. Take care not to damage the wire. Do not use detergents or glass cleaners with abrasive ingredients. When measuring voltage, wrap a piece of tin foil around the tip 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 GLASS ANTENNA OK: Go to next step
  6. CHECK ANTENNA CORD Remove the antenna plug of the radio receiver and antenna. Measure the resistance between the antenna cord's inner conductor and radio receiver to check for an open circuit in the antenna cord. Standard resistance Below 1 ohms Measure the resistance between the antenna cord's inner conductor and body ground to check for a short circuit in the antenna cord. Standard resistance 10 kohms or higher NG --> REPLACE ANTENNA CORD OK: Go to next step
  7. REPLACE AMPLIFIER ANTENNA Replace the amplifier antenna and check if radio broadcasts can be received normally. OK Radio broadcasts can be received. OK --> END NG --> REPLACE RADIO RECEIVER
  1. CHECK AUDIO SETTINGS Set "BASS", "MID", and "TREB" to the initial values and check that sound is normal. OK Malfunction disappears. OK --> END NG: Go to next step
  2. COMPARE WITH ANOTHER VEHICLE OF SAME MODEL Compare with another vehicle of the same model. Compare with another vehicle of the same model which does not have trouble to see if there is any difference in the sound quality. OK No difference is found. OK --> END NG --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387469-S35495030182011022400000)
  1. INSPECT RADIO RECEIVER Disconnect the radio receiver connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition ATX+ - ATX- Always 60 to 80 ohms TXM+ - TXM- Always 60 to 80 ohms TX+ - TX- Always 60 to 80 ohms NG --> REPLACE RADIO RECEIVER OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR HINT: For details of the connectors, refer to the "TERMINALS OF ECU". Refer to «TERMINALS OF ECU»(ref-387469-S02295999392011022400000) . Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits. Disconnect all connectors in all AVC-LAN circuits. Check for an open or short in all AVC-LAN circuits. OK There is no open or short circuit. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387469-S35495030182011022400000)
  1. IDENTIFY THE COMPONENT SHOWN BY SUB-CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component shown by the sub-code. HINT: "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration. For details of the DTC display, refer to "DTC CHECK/CLEAR". Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE Inspect the power source circuit of the component shown by the sub-code. If the power source circuit is operating normally, proceed to the next step. COMPONENT TABLE: Component Proceed to Gateway ECU (1C6) Gateway ECU power source circuit. Refer to «Gateway ECU Power Source Circuit»(ref-387470-S11192389572011022400000) Stereo component amplifier (440) Stereo component amplifier power source circuit. Refer to «Stereo Component Amplifier Power Source Circuit»(ref-387470-S32940667872011022400000) Integration control & panel assembly (1D8) Integration control & panel assembly power source circuit. Refer to «Integration Control and Panel Assembly Power Source Circuit»(ref-387470-S29050375752011022400000) NEXT: Go to next step
  3. INSPECT RADIO RECEIVER Disconnect the radio receiver connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition ATX+ - ATX- Always 60 to 80 ohms TXM+ - TXM- Always 60 to 80 ohms TX+ - TX- Always 60 to 80 ohms NG --> REPLACE RADIO RECEIVER OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT SHOWN BY SUB-CODE) HINT: Start the check from the circuit that is near the component shown by the sub-code first. For details of the connectors, refer to the "TERMINALS OF ECU". Refer to «TERMINALS OF ECU»(ref-387469-S02295999392011022400000) . Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component shown by the sub-code. Disconnect all connectors between the radio receiver and the component shown by sub-code. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component shown by the sub-code. OK There is no open or short circuit. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. REPLACE COMPONENT SHOWN BY SUB-CODE Replace the component shown by the sub-code with a normal one and check if the same problem occurs again. OK Same problem does not occur. NG --> REPLACE RADIO RECEIVER OK --> END
  1. IDENTIFY THE COMPONENT SHOWN BY SUB-CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component shown by the sub-code. HINT: "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration. For details of the DTC display, refer to "DTC CHECK/CLEAR". Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE Inspect the power source circuit of the component shown by the sub-code. If the power source circuit is operating normally, proceed to the next step. COMPONENT TABLE: Component Proceed to Gateway ECU (1C6) Gateway ECU power source circuit. Refer to «Gateway ECU Power Source Circuit»(ref-387470-S11192389572011022400000) Integration control & panel assembly (1D8) Integration control & panel assembly power source circuit. Refer to «Integration Control and Panel Assembly Power Source Circuit»(ref-387470-S29050375752011022400000) Radio receiver (190) Radio receiver power source circuit. Refer to «Radio Receiver Power Source Circuit»(ref-387470-S13165570202011022400000) NEXT: Go to next step
  3. INSPECT RADIO RECEIVER Disconnect the radio receiver connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition ATX+ - ATX- Always 60 to 80 ohms TXM+ - TXM- Always 60 to 80 ohms TX+ - TX- Always 60 to 80 ohms NG --> REPLACE RADIO RECEIVER OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - COMPONENT SHOWN BY SUB-CODE) HINT: Start the check from the circuit that is near the component shown by the sub-code first. For details of the connectors, refer to the "TERMINALS OF ECU". Refer to «TERMINALS OF ECU»(ref-387469-S02295999392011022400000) . Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the stereo component amplifier and the component shown by the sub-code. Disconnect all connectors between the stereo component amplifier and the component shown by sub-code. Check for an open or short in the AVC-LAN circuit between the stereo component amplifier and the component shown by the sub-code. OK There is no open or short circuit. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. REPLACE COMPONENT SHOWN BY SUB-CODE Replace the component shown by the sub-code with a normal one and check if the same problem occurs again. OK Same problem does not occur. NG --> REPLACE STEREO COMPONENT AMPLIFIER OK --> END
  1. IDENTIFY THE COMPONENT SHOWN BY SUB-CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component shown by the sub-code. HINT: "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration. For details of the DTC display, refer to "DTC CHECK/CLEAR". Refer to «DTC CHECK / CLEAR»(ref-387469-S27138033392011022400000) . NEXT: Go to next step
  2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE Inspect the power source circuit of the component shown by the sub-code. If the power source circuit is operating normally, proceed to the next step. COMPONENT TABLE: Component Proceed to Radio receiver (190) Radio receiver power source circuit. Refer to «Radio Receiver Power Source Circuit»(ref-387470-S13165570202011022400000) Stereo component amplifier (440) Stereo component amplifier power source circuit. Refer to «Stereo Component Amplifier Power Source Circuit»(ref-387470-S32940667872011022400000) Gateway ECU (1C6) Gateway ECU power source circuit. Refer to «Gateway ECU Power Source Circuit»(ref-387470-S11192389572011022400000) NEXT: Go to next step
  3. INSPECT RADIO RECEIVER Disconnect the radio receiver connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition ATX+ - ATX- Always 60 to 80 ohms TXM+ - TXM- Always 60 to 80 ohms TX+ - TX- Always 60 to 80 ohms NG --> REPLACE RADIO RECEIVER OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL & PANEL - COMPONENT SHOWN BY SUB-CODE) HINT: Start the check from the circuit that is near the component shown by the sub-code first. For details of the connectors, refer to "TERMINALS OF ECU". Refer to «TERMINALS OF ECU»(ref-387469-S02295999392011022400000) . Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the integration control & panel assembly and the component shown by the sub-code. Disconnect all connectors between the integration control & panel assembly and the component shown by sub-code. Check for an open or short in the AVC-LAN circuit between the integration control & panel assembly and the component shown by the sub-code. OK There is no open or short circuit. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. REPLACE COMPONENT SHOWN BY SUB-CODE Replace the component shown by the sub-code with a normal one and check if the same problem occurs again. OK Same problem does not occur. NG --> REPLACE INTEGRATION CONTROL & PANEL ASSEMBLY OK --> END

More articles — Audio / Visual (Diagnostic Codes & Circuit Tests)