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Audio / Visual Systems (Diagnostic Codes & Symptom Tests): Overview Toyota Highlander II facelift

Entertainment Systems 37 illustrations ~5263 words

DESCRIPTION

DTC No.DTC Detection ConditionTrouble Area
01-21A ROM malfunction exists.Radio receiver assembly
01-22A RAM malfunction exists.
01-2EA checksum malfunction exists.
DTC No.DTC Detection ConditionTrouble Area
01-D5 *1, *3A device indicated by the sub-code is (was) disconnected from the system with the ignition switch to ON or ACC. The communication condition with the device that the DTC shows cannot be obtained when the engine was started.Power source circuit of the component shown by the sub-code AVC-LAN circuit between the radio receiver assembly and component shown by the sub-code Component shown by the sub-code
01-D8 *2, *3The device indicated by the sub-code is (was) disconnected from the system after the engine starts.
01-D9 *1, *3The device that had functioned before the engine stopped is (was) disconnected from the system with the ignition switch to ON or ACC.
01-DA *3No response is identified when changing mode. Sound and image do not change by switch operation.
01-DB *1, *3A dual alarm is detected.
01-DE *3A slave device has been disconnected after the engine starts.

HINT

  1. *1: Even if no fault is present, this DTC may be stored depending on the battery condition or engine start voltage.
  2. *2: If the power connector is disconnected after the engine starts, this DTC is stored after 180 seconds.
  3. *3: If the device is reported as not existing during verification, check the power source circuit and AVC-LAN circuit for the device.

Note. Before starting troubleshooting, be sure to clear the DTCs stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs. The radio receiver assembly is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

DTC No.DTC Detection ConditionTrouble Area
01-D6*1Either condition is met: The device that stores (stored) the DTC has (had) been disconnected with the ignition switch to ON or ACC. The master device has (had) been disconnected when this DTC is (was) stored.Radio receiver assembly power source circuit Power source circuit of the component which has stored this code AVC-LAN circuit between the radio receiver assembly and component which has stored this code Component which has stored this code Radio receiver assembly
01-D7*2Either condition is met: The device that stored the code has (had) been disconnected after the engine starts (started). The master device has (had) been disconnected when this DTC is (was) stored.

HINT

  1. *1: Even if no fault is present, this DTC may be stored depending on the battery condition or engine start voltage.
  2. *2: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the ignition switch to ON or ACC, this DTC is stored.

Note. Before starting troubleshooting, be sure to clear the DTCs stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs. The radio receiver assembly is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

DTC No.DTC Detection ConditionTrouble Area
01-DC *1Transmission to component shown by sub-code failed (Detecting this DTC does not always mean actual failure).If the same sub-code is stored in other components, check power source circuit and communication system of all components shown by sub-code

HINT

*1: If the ignition switch is turned off after idling for 60 seconds, this DTC may be stored when the engine is started again.

Note. Before starting troubleshooting, be sure to clear the DTCs stored due to the reason described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs. The radio receiver assembly is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

DTC No.DTC Detection ConditionTrouble Area
01-DD *1The device that should be the master has been disconnected after the engine starts.Radio receiver assembly power source circuit AVC-LAN circuit between the radio receiver assembly and component which has stored this code Radio receiver assembly Component which has stored this code
01-E1 *2The AMP device stores that the AMP output does not function even while the source device operates.

HINT

  1. *1: If the ignition switch is turned off after idling for 60 seconds, this DTC may be stored when the engine is started again.
  1. *2: Even if no fault is present, this DTC may be stored depending on the battery condition or engine start voltage.

Note. Before starting troubleshooting, be sure to clear the DTCs stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs. The radio receiver assembly is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

DTC No.DTC Detection ConditionTrouble Area
01-DF *1The device with a display fails and the master unit is switched to the audio device. Also when a communication error between the sub-master unit (audio) and master unit occurs, this DTC is stored.Radio receiver assembly power source circuit AVC-LAN circuit between the radio receiver assembly and component which has stored this code Radio receiver assembly Component which has stored this code

HINT

*1: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the ignition switch to ON or ACC, this DTC is stored.

Note. Before starting troubleshooting, be sure to clear the DTCs stored due to the reason described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs. The radio receiver assembly is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

DTC No.DTC Detection ConditionTrouble Area
01-E0"Registration complete" signal from the master device cannot be received.
01-E3Either condition is met: The registration demand signal from the slave device is output. The registration demand signal is output by receiving connection confirmation signal from the sub-master device.
01-E4The multiple frame transmission is incomplete.

HINT

Even if no fault is present, these DTCs may be stored depending on the battery condition or engine start voltage.

DTC No.DTC Detection ConditionTrouble Area
01-E2The command for ON/OFF control from the master device has a problem.Radio receiver assembly
DTC No.DTC Detection ConditionTrouble Area
01-F2Any reply to a system inspection instruction, system inspection result request or diagnosis memory request could not be completed within a designated time.Stereo component amplifier assembly
01-FFNo response to a diagnosis request
DTC No.DTC Detection ConditionTrouble Area
57-10"Bluetooth" module malfunctionRadio receiver assembly
57-47"Bluetooth" module is not installed. Problem with "Bluetooth" module Problem in communication line to "Bluetooth" module
DTC No.DTC Detection ConditionTrouble Area
60-10The AM tuner PLL (Phase Locked Loop) synchronization is impossible.Radio receiver assembly
60-11The FM tuner PLL (Phase Locked Loop) synchronization is impossible.
DTC No.DTC Detection ConditionTrouble Area
60-42The power source of the tuner is abnormal.Radio receiver assembly
60-43The AM tuner is abnormal.
60-44The FM tuner is abnormal.
60-50A problem occurs in the IC inside the tuner unit and radio reception is not normal.
DTC No.DTC Detection ConditionTrouble Area
62-10A mechanical error in the CD player is detected while a disc is not being inserted or ejected.Radio receiver assembly
62-11Discs cannot be inserted or ejected.
62-12Disc read problem occurs.
63-10A mechanical error in the CD changer is detected while a disc is not being inserted or ejected.
63-11Discs cannot be inserted or ejected.
63-12Disc read problem occurs.
DTC No.DTC Detection ConditionTrouble Area
62-41An unsuitable disc is inserted.CD Radio receiver assembly
62-42The disc cannot be read.
63-41An unsuitable disc is inserted.
63-42The disc cannot be read.
DTC No.DTC Detection ConditionTrouble Area
62-43CD-ROM operation is abnormal.CD Radio receiver assembly
63-43
DTC No.DTC Detection ConditionTrouble Area
62-44Operation error in the CD mechanismRadio receiver assembly
62-48Excess current is present in the CD player.
62-50Malfunction in insertion/ejection system
63-44Operation error in the CD mechanism
63-48Excess current is present in the CD changer.
63-50Malfunction in insertion/ejection system
DTC No.DTC Detection ConditionTrouble Area
62-45Disc cannot be ejected.Radio receiver assembly
62-51Mechanical error occurs during elevator operation.
62-52Error occurs in CD changer clamp.
63-45Disc cannot be ejected.
63-51Mechanical error occurs during elevator operation.
63-52Error occurs in CD changer clamp.
DTC No.DTC Detection ConditionTrouble Area
62-46Scratches or dirt is found on CD surface or CD is inserted upside down.CD Radio receiver assembly
63-46
DTC No.DTC Detection ConditionTrouble Area
62-47Sensor detects that CD unit temperature is high (Over 80°C (176°F).Radio receiver assembly
63-47
DTC No.DTC Detection ConditionTrouble Area
62-78An error occurs during the decode process (MP3/WMA).
63-78
DTC No.DTC Detection ConditionTrouble Area
62-7DAn incompatible MP3/WMA file is used. Although the file has an extension of ".mp3" or ".wma", the header information cannot be read.CD Radio receiver assembly
62-7EA disc with no music data is used. Playable files are not on the disc (MP3/WMA).
62-7FCopyright protection exists and playback is not possible.
63-7DAn incompatible MP3/WMA file is used. Although the file has an extension of ".mp3" or ".wma", the header information cannot be read.CD Radio receiver assembly
63-7EA disc with no music data is used. Playable files are not on the disc (MP3/WMA).
63-7FCopyright protection exists and playback is not possible.
DTC No.DTC Detection ConditionTrouble Area
C0-11Tuner PLL synchronization is impossible.Radio receiver assembly
C0-12A communication error occurred in CDED.
C0-13A communication error occurred in SSDEC.
C0-14No response received from SSDEC.
C0-15An error occurred in CAP internal NVM.
C0-16An error occurred in CAP.
DTC No.DTC Detection ConditionTrouble Area
C0-40Antenna is not connected.Antenna cord Satellite radio antenna assembly Radio receiver assembly
C0-41Short in antenna circuit
DTC No.DTC Detection ConditionTrouble Area
CB-10System microcomputer malfunction"iPod" or USB device Multi-media interface ECU
CB-11Media interface microcomputer malfunction
CB-12CD-LSI (Large Scale Integration) malfunction
DTC No.DTC Detection ConditionTrouble Area
CB-13"iPod" or USB device overcurrent malfunction"iPod" or USB device No. 1 stereo jack adapter assembly Wire harness or connector Multi-media interface ECU

Scheme 117

Scheme 117: WIRING DIAGRAM
Scheme 117: WIRING DIAGRAM

Scheme 118

Scheme 118: PROCEDURE
Scheme 118: PROCEDURE

Scheme 119

Scheme 119
Scheme 119
  1. REPLACE USB DEVICE OR "iPod" Disconnect the USB device or "iPod" from the No. 1 stereo jack adapter assembly. Turn the ignition switch off. HINT: When this DTC has been stored, it is necessary to turn off the ignition switch to make it possible for the vehicle to recognize a new device when it is connected. Turn the ignition switch to ACC. Connect a known good USB device or "iPod" to the No. 1 stereo jack adapter assembly. NEXT: Go to next step
  2. CLEAR DTC Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422575-S38056672132011092600000) . NEXT: Go to next step
  3. RECHECK FOR DTC Recheck for DTCs and check if the same DTC is output again. HINT: If DTCs are detected frequently, replace the multi-media interface ECU. OK No DTCs are output. NG --> See step 4 OK --> USB DEVICE OR "iPod" WAS DEFECTIVE
  4. INSPECT MULTI-MEDIA INTERFACE ECU Disconnect the No. 1 stereo jack adapter assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E36-1 (UPI) - E36-4 (UJSG) Ignition switch ACC 5 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly) NG --> See step 6 OK --> See step 5
  5. REPLACE NO. 1 STEREO JACK ADAPTER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S07412348152011092600000)
  6. CHECK HARNESS AND CONNECTOR Disconnect the multi-media interface ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E37-4 (UPO) - E36-1 (UPI) Always Below 1 ohms E37-1 (UESG) - E36-4 (UJSG) Always Below 1 ohms E36-1 (UPI) - Body ground Always 10 kohms or higher E36-4 (UJSG) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *a Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly) *b Front view of wire harness connector (to Multi-media Interface ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
  7. REPLACE MULTI-MEDIA INTERFACE ECU. Refer to «REMOVAL»(ref-422543-S42459105452011092600000)
DTC No.DTC Detection ConditionTrouble Area
CB-43When a non mass-storage class or incompatible protocol USB device is connected.USB device Multi-media interface ECU
CB-44When a USB device with an incompatible file system, corrupted or incompatible File Allocation Table (FAT) is connected.
CB-50"iPod" malfunction"iPod" Multi-media interface ECU
CB-51When an "iPod" with an unsupported firmware is connected.
CB-7DWhen an unsupported model of "iPod" is connected.
DTC No.DTC Detection ConditionTrouble Area
CB-45Communication error with USB deviceConnection cable USB device Multi-media interface ECU
CB-46"iPod" control software malfunctionConnection cable "iPod" Multi-media interface ECU
CB-47Communication error with "iPod"
DTC No.DTC Detection ConditionTrouble Area
CB-52No playable files on the "iPod""iPod"
CB-7ENo playable files on the USB deviceUSB device

for Automatic Sound Levelizer (ASL)

  1. This circuit is necessary for the Automatic Sound Levelizer (ASL) built into the radio receiver assembly. The Automatic Sound Levelizer (ASL) function automatically adjusts the audio system volume level in order to compensate for increased vehicle noise (vehicle noise tends to increase as vehicle speed increases). The ASL adjusts the volume level based upon vehicle speed signals that it receives from the combination meter assembly.

for "Bluetooth"

  1. Speed signals are received from the combination meter assembly and used to cancel "Bluetooth" function operation. The radio receiver assembly recognizes that the vehicle is being driven and makes it impossible to connect or register a "Bluetooth" device while driving.

HINT

  1. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.
  2. If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the following diagram will not operate normally.

Scheme 120

Scheme 120: WIRING DIAGRAM
Scheme 120: WIRING DIAGRAM

Scheme 121

Scheme 121
Scheme 121
  1. for 2GR-FE
  2. for 1AR-FE

Scheme 122

Scheme 122: PROCEDURE
Scheme 122: PROCEDURE
  1. INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM) Check the output waveform. Remove the combination meter assembly with the connector still connected. Connect an oscilloscope to terminal E1-9 (+S) and body ground. Turn the ignition switch to ON. Turn a wheel slowly. Check the signal waveform according to the condition(s) in the table below. Item Condition Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Wheel being rotated OK The waveform is similar to that shown in the illustration. HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows. TEXT IN ILLUSTRATION *a Component with harness connected (Combination Meter Assembly) NG --> See step 5 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY) Disconnect the radio receiver assembly connector and the combination meter assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E3-3 (SPD) - E1-9 (+S) Always Below 1 ohms NG --> See step 3 OK --> See step 4
  3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - JUNCTION CONNECTOR) Disconnect the junction connector and the radio receiver assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E24-4 - E3-3 (SPD) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER ASSEMBLY - JUNCTION CONNECTOR) OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (JUNCTION CONNECTOR)
  4. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S13822427872011092600000)
  5. GO TO METER / GAUGE SYSTEM. Refer to «Speed Signal Circuit»(ref-422465-S42293094162011092600000)

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

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

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

Therefore, the radio receiver assembly cannot be operated using the steering pad switch assembly, and also the radio receiver assembly itself cannot function.

Scheme 123

Scheme 123: WIRING DIAGRAM
Scheme 123: WIRING DIAGRAM

Power is supplied to the radio receiver assembly and steering pad switch assembly illumination when the light control switch is in the tail or head position.

Scheme 124

Scheme 124: WIRING DIAGRAM
Scheme 124: WIRING DIAGRAM

w/ Back Door Speaker

  1. If there is a short in a speaker circuit, the stereo component amplifier assembly detects the short and stops output to the speakers.
  2. Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly or speakers.
  3. If a short is detected in a speaker circuit, no sound can be heard from the speakers.

w/o Back Door Speaker

  1. If there is a short in this circuit, the radio receiver assembly detects it and stops output to the speakers.
  2. Thus sound cannot be heard from the speakers even if there is no malfunction in the radio receiver assembly or speakers.
  3. If a short is detected in a speaker circuit, no sound can be heard from the speakers.

Scheme 125

Scheme 125: WIRING DIAGRAM
Scheme 125: WIRING DIAGRAM

Scheme 126

Scheme 126
Scheme 126

Scheme 127

Scheme 127
Scheme 127

Scheme 128

Scheme 128
Scheme 128
  1. w/ Back Door Speaker
  2. w/o Back Door Speaker

Scheme 129

Scheme 129: PROCEDURE
Scheme 129: PROCEDURE

Scheme 130

Scheme 130
Scheme 130

Scheme 131

Scheme 131
Scheme 131

Scheme 132

Scheme 132
Scheme 132

Scheme 133

Scheme 133
Scheme 133
  1. CONFIRM MODEL Result Condition Proceed to w/ Back Door Speaker A w/o Back Door Speaker B B --> See step 7 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR Disconnect the connectors from the stereo component amplifier assembly and speakers. Measure the resistance between each of the front No. 1 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition N15-9 (FR+) - G5-1 Always Below 1 ohms N15-3 (FR-) - G5-2 Always Below 1 ohms N15-2 (FL+) - H5-1 Always Below 1 ohms N15-1 (FL-) - H5-2 Always Below 1 ohms Measure the resistance between each of the rear speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition N16-10 (RR+) - J1-1 Always Below 1 ohms N16-4 (RR-) - J1-2 Always Below 1 ohms N16-3 (RL+) - K1-1 Always Below 1 ohms N16-9 (RL-) - K1-2 Always Below 1 ohms Measure the resistance between each of the front No. 2 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition N16-2 (FR+) - f1-1 Always Below 1 ohms N16-6 (FR-) - f1-2 Always Below 1 ohms N16-8 (FL+) - F3-1 Always Below 1 ohms N16-7 (FL-) - F3-2 Always Below 1 ohms Measure the resistance between the stereo component speaker assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition N15-5 (WFL+) - T6-4 (WF+) Always Below 1 ohms N15-12 (WFL-) - T6-3 (WF-) Always Below 1 ohms N15-4 (WFR+) - T6-1 (WF+) Always Below 1 ohms N15-10 (WFR-) - T6-2 (WF-) Always Below 1 ohms Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition N15-9 (FR+) - Body ground Always 10 kohms or higher N15-3 (FR-) - Body ground Always 10 kohms or higher N15-2 (FL+) - Body ground Always 10 kohms or higher N15-1 (FL-) - Body ground Always 10 kohms or higher N16-10 (RR+) - Body ground Always 10 kohms or higher N16-4 (RR-) - Body ground Always 10 kohms or higher N16-3 (RL+) - Body ground Always 10 kohms or higher N16-9 (RL-) - Body ground Always 10 kohms or higher N16-2 (FR+) - Body ground Always 10 kohms or higher N16-6 (FR-) - Body ground Always 10 kohms or higher N16-8 (FL+) - Body ground Always 10 kohms or higher N16-7 (FL-) - Body ground Always 10 kohms or higher N15-5 (WFL+) - Body ground Always 10 kohms or higher N15-12 (WFL-) - Body ground Always 10 kohms or higher N15-4 (WFR+) - Body ground Always 10 kohms or higher N15-10 (WFR-) - Body ground Always 10 kohms or higher Measure the resistance between each of the front No. 1 speaker assemblies and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition G5-1 - Body ground Always 10 kohms or higher G5-2 - Body ground Always 10 kohms or higher H5-1 - Body ground Always 10 kohms or higher H5-2 - Body ground Always 10 kohms or higher Measure the resistance between each of the rear speaker assemblies and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition J1-1 - Body ground Always 10 kohms or higher J1-2 - Body ground Always 10 kohms or higher K1-1 - Body ground Always 10 kohms or higher K1-2 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G5-1 - G5-2 Always 1.8 to 2.6 ohms H5-1 - H5-2 Always 1.8 to 2.6 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Front No. 1 Speaker assembly) NG --> See step 12 OK: Go to next step
  4. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition f1-1 - f1-2 Always 1.5 to 2.5 ohms F3-1 - F3-2 Always 1.5 to 2.5 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Front No. 2 Speaker assembly) NG --> See step 16 OK: Go to next step
  5. INSPECT REAR SPEAKER ASSEMBLY Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition J1-1 - J1-2 Always 2.1 to 3.1 ohms K1-1 - K1-2 Always 2.1 to 3.1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Rear Speaker assembly) NG --> See step 13 OK: Go to next step
  6. INSPECT STEREO COMPONENT SPEAKER ASSEMBLY Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition T6-1 (WF+) - T6-2 (WF-) Always 1.6 to 2.4 ohms T6-3 (WF-) - T6-4 (WF+) Always 1.6 to 2.4 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Stereo Component Speaker assembly) NG --> See step 14 OK --> See step 15
  7. CHECK HARNESS AND CONNECTOR Disconnect the connectors from the radio receiver assembly and speakers. Measure the resistance between each of the front No. 1 speaker assemblies and the radio receiver assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition E8-1 (FR+) - G5-1 Always Below 1 ohms E8-5 (FR-) - G5-2 Always Below 1 ohms E8-2 (FL+) - H5-1 Always Below 1 ohms E8-6 (FL-) - H5-2 Always Below 1 ohms Measure the resistance between each of the front No. 2 speaker assemblies and the radio receiver assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition E8-1 (FR+) - f2-2 (Tw+) Always Below 1 ohms E8-5 (FR-) - f2-4 (Tw-) Always Below 1 ohms E8-2 (FL+) - F4-2 (Tw+) Always Below 1 ohms E8-6 (FL-) - F4-4 (Tw-) Always Below 1 ohms Measure the resistance between each of the rear speaker assemblies and the radio receiver assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition E9-1 (RR+) - J1-1 Always Below 1 ohms E9-3 (RR-) - J1-2 Always Below 1 ohms E9-2 (RL+) - K1-1 Always Below 1 ohms E9-6 (RL-) - K1-2 Always Below 1 ohms Measure the resistance between the radio receiver assembly and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition E8-1 (FR+) - Body ground Always 10 kohms or higher E8-5 (FR-) - Body ground Always 10 kohms or higher E8-2 (FL+) - Body ground Always 10 kohms or higher E8-6 (FL-) - Body ground Always 10 kohms or higher E9-1 (RR+) - Body ground Always 10 kohms or higher E9-3 (RR-) - Body ground Always 10 kohms or higher E9-2 (RL+) - Body ground Always 10 kohms or higher E9-6 (RL-) - Body ground Always 10 kohms or higher Measure the resistance between each of the front No. 1 speaker assemblies and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition G5-1 - Body ground Always 10 kohms or higher G5-2 - Body ground Always 10 kohms or higher H5-1 - Body ground Always 10 kohms or higher H5-2 - Body ground Always 10 kohms or higher Measure the resistance between each of the rear speaker assemblies and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition J1-1 - Body ground Always 10 kohms or higher J1-2 - Body ground Always 10 kohms or higher K1-1 - Body ground Always 10 kohms or higher K1-2 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  8. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G5-1 - G5-2 Always 3.2 to 4.8 ohms H5-1 - H5-2 Always 3.2 to 4.8 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Front No. 1 Speaker assembly) NG --> See step 12 OK: Go to next step
  9. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition f2-2 (Tw+) - f2-4 (Tw-) Always 10 kohms or higher F4-2 (Tw+) - F4-4 (Tw-) Always 10 kohms or higher TEXT IN ILLUSTRATION *a Component without harness connected (Front No. 2 Speaker assembly) NG --> See step 16 OK: Go to next step
  10. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Check that the malfunction disappears when a known good speaker is installed, refer to «REMOVAL»(ref-422543-S30222779222011092600000) . OK Malfunction disappears. HINT: Connect all the connectors to the front No. 2 speaker assemblies that were disconnected. When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one. Perform the above inspection on both LH and RH sides. NG --> See step 11 OK --> END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)
  11. INSPECT REAR SPEAKER ASSEMBLY Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition J1-1 - J1-2 Always 3.2 to 4.8 ohms K1-1 - K1-2 Always 3.2 to 4.8 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Rear Speaker assembly) NG --> See step 13 OK --> See step 15
  12. REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S02343689102011092600000)
  13. REPLACE REAR SPEAKER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S02290727072011092600000)
  14. REPLACE STEREO COMPONENT SPEAKER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S20745273982011092600000)
  15. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-422575-S39959037932011092600000)
  16. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S30222779222011092600000)

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

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

If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, radio receiver assembly or speakers.

Scheme 134

Scheme 134: WIRING DIAGRAM
Scheme 134: WIRING DIAGRAM

The multi-media interface ECU sends the sound signal to the radio receiver assembly through this circuit.

If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, radio receiver assembly or speakers.

Scheme 135

Scheme 135: WIRING DIAGRAM
Scheme 135: WIRING DIAGRAM

The No. 1 stereo jack adapter assembly sends the sound signal from an external device to the radio receiver assembly through this circuit.

The sound signal that has been sent is amplified by the stereo component amplifier assembly or radio receiver assembly, and then is sent to the speakers.

If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, radio receiver assembly or speakers.

Scheme 136

Scheme 136: WIRING DIAGRAM
Scheme 136: WIRING DIAGRAM

Scheme 137

Scheme 137
Scheme 137
  1. w/o USB Audio System
  2. w/ USB Audio System

Scheme 138

Scheme 138: PROCEDURE
Scheme 138: PROCEDURE
  1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY) Disconnect the No. 1 stereo jack adapter assembly and radio receiver assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance W/O USB AUDIO SYSTEM Tester Connection Condition Specified Condition E12-4 (AUXO) - E3-19 (AUXI) Always Below 1 ohms E12-3 (ASGN) - E3-16 (ASGN) Always Below 1 ohms E12-2 (ARO) - E3-15 (ARI) Always Below 1 ohms E12-1 (ALO) - E3-17 (ALI) Always Below 1 ohms E12-5 (AGND) - E3-18 (AGND) Always Below 1 ohms E12-4 (AUXO) - Body ground Always 10 kohms or higher E12-3 (ASGN) - Body ground Always 10 kohms or higher E12-2 (ARO) - Body ground Always 10 kohms or higher E12-1 (ALO) - Body ground Always 10 kohms or higher E12-5 (AGND) - Body ground Always 10 kohms or higher Standard Resistance W/ USB AUDIO SYSTEM Tester Connection Condition Specified Condition E36-9 (AUXO) - E3-19 (AUXI) Always Below 1 ohms E36-8 (ASGN) - E3-16 (ASGN) Always Below 1 ohms E36-6 (ARO) - E3-15 (ARI) Always Below 1 ohms E36-7 (ALO) - E3-17 (ALI) Always Below 1 ohms E36-10 (AGND) - E3-18 (AGND) Always Below 1 ohms E36-9 (AUXO) - Body ground Always 10 kohms or higher E36-8 (ASGN) - Body ground Always 10 kohms or higher E36-6 (ARO) - Body ground Always 10 kohms or higher E36-7 (ALO) - Body ground Always 10 kohms or higher E36-10 (AGND) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *A w/o USB Audio System *B w/ USB Audio System *a Front view of wire harness connector (to Radio Receiver Assembly) *b Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 2
  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-422575-S39959037932011092600000)

The No. 1 stereo jack adapter assembly sends the sound data from an external device to the multi-media interface ECU through this circuit.

Scheme 139

Scheme 139: WIRING DIAGRAM
Scheme 139: WIRING DIAGRAM

Scheme 140

Scheme 140: PROCEDURE
Scheme 140: PROCEDURE
  1. CHECK HARNESS AND CONNECTOR Disconnect the multi-media interface ECU and No. 1 stereo jack adapter assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E36-3 (UDO+) - E37-2 (UDI+) Always Below 1 ohms E36-2 (UDO-) - E37-3 (UDI-) Always Below 1 ohms E36-5 (UJSS) - E37-5 (UESS) Always Below 1 ohms E36-3 (UDO+) - Body ground Always 10 kohms or higher E36-2 (UDO-) - Body ground Always 10 kohms or higher E36-5 (UJSS) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *a Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly) *b Front view of wire harness connector (to Multi-media Interface ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 2
  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-422575-S39959037932011092600000)

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

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

If there is a short in the circuit, even though the stereo component amplifier assembly is functioning, no sound, or only an extremely faint sound, can be heard.

Scheme 141

Scheme 141: WIRING DIAGRAM
Scheme 141: WIRING DIAGRAM

Scheme 142

Scheme 142: PROCEDURE
Scheme 142: PROCEDURE

Scheme 143

Scheme 143
Scheme 143
  1. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition N14-1 (MUTE) - Body ground Ignition switch ACC, audio system is playing --> Changing modes Above 3.5 V --> Below 1 V TEXT IN ILLUSTRATION *a Component with harness connected (Stereo Component Amplifier Assembly) NG --> See step 2 OK --> See step 5
  2. CHECK HARNESS AND CONNECTOR Disconnect the radio receiver assembly and stereo component amplifier assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E2-7 (MUTE) - N14-1 (MUTE) Always Below 1 ohms E2-7 (MUTE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL) Reconnect the stereo component amplifier assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E2-7 (MUTE) - Body ground Ignition switch ACC, audio system is playing Above 3.5 V TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Radio Receiver Assembly) NG --> See step 6 OK --> See step 4
  4. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S13822427872011092600000)
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-422575-S39959037932011092600000)
  6. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S02267149302011092600000)

The multi-media interface ECU sends a mute signal to the radio receiver assembly.

The radio receiver assembly controls the volume according to the mute signal from the multi-media interface ECU.

The mute signal is sent to reduce noise and popping sounds generated when switching modes.

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

If there is a short in the circuit, even though the radio receiver assembly is functioning, no sound, or only an extremely faint sound, can be heard.

Scheme 144

Scheme 144: WIRING DIAGRAM
Scheme 144: WIRING DIAGRAM

Scheme 145

Scheme 145: PROCEDURE
Scheme 145: PROCEDURE

Scheme 146

Scheme 146
Scheme 146
  1. INSPECT RADIO RECEIVER ASSEMBLY Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E16-6 (MUTE) - Body ground Ignition switch ACC, USB audio system is playing --> Changing modes Above 3.5 V --> Below 1 V TEXT IN ILLUSTRATION *a Component with harness connected (Radio Receiver Assembly) NG --> See step 2 OK --> See step 4
  2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-MEDIA INTERFACE ECU) Disconnect the radio receiver assembly and multi-media interface ECU connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E16-6 (MUTE) - E30-6 (MUT1) Always Below 1 ohms E16-6 (MUTE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. INSPECT MULTI-MEDIA INTERFACE ECU Reconnect the multi-media interface ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E30-6 (MUT1) - Body ground Ignition switch ACC Above 3.5 V TEXT IN ILLUSTRATION *a Component with harness connected (Multi-media Interface ECU) NG --> See step 5 OK --> See step 6
  4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-422575-S39959037932011092600000)
  5. REPLACE MULTI-MEDIA INTERFACE ECU. Refer to «REMOVAL»(ref-422543-S42459105452011092600000)
  6. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S13822427872011092600000)

Each audio system component connected to the AVC-LAN (communication bus) transfers switch signals using the AVC-LAN.

If a short to +B or short to ground occurs in the AVC-LAN, the audio system will not function normally because communication is not possible.

The circuit is necessary for the Automatic Sound Levelizer (ASL) built into the stereo component amplifier assembly.

The Automatic Sound Levelizer (ASL) function automatically adjusts the audio system volume level in order to compensate for increased vehicle noise (vehicle noise tends to increase as vehicle speed increases). The ASL adjusts the volume level based upon vehicle speed signals that it receives from the combination meter assembly.

HINT

  1. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.
  2. If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the following diagram will not operate normally.

This circuit is used when an incoming cellular phone voice in the "Bluetooth" hands-free system is received.

Scheme 147

Scheme 147: WIRING DIAGRAM
Scheme 147: WIRING DIAGRAM

This circuit sends the voice signal from the telephone microphone assembly to the radio receiver assembly.

It also supplies power source from the radio receiver assembly to the telephone microphone assembly.

Scheme 148

Scheme 148: WIRING DIAGRAM
Scheme 148: WIRING DIAGRAM

Scheme 149

Scheme 149: PROCEDURE
Scheme 149: PROCEDURE

Scheme 150

Scheme 150
Scheme 150
  1. INSPECT RADIO RECEIVER ASSEMBLY Disconnect the radio receiver assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition E32-3 (MACC) - Body ground Ignition switch ON 4 to 6 V TEXT IN ILLUSTRATION *a Component without harness connected (Radio Receiver Assembly) NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (TELEPHONE MICROPHONE ASSEMBLY - RADIO RECEIVER ASSEMBLY) Disconnect the telephone microphone assembly and radio receiver assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Q11-4 (SNS2) - E32-1 (SNS2) Always Below 1 ohms Q11-3 (MIC+) - E32-2 (MIN+) Always Below 1 ohms Q11-5 (MIC-) - E32-5 (MIN-) Always Below 1 ohms Q11-1 (MACC) - E32-3 (MACC) Always Below 1 ohms Q11-4 (SNS2) - Body ground Always 10 kohms or higher Q11-3 (MIC+) - Body ground Always 10 kohms or higher Q11-5 (MIC-) - Body ground Always 10 kohms or higher Q11-1 (MACC) - Body ground Always 10 kohms or higher E32-6 (SGND) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. INSPECT TELEPHONE MICROPHONE ASSEMBLY Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Q11-4 (SNS2) - Q11-5 (MIC-) Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Telephone Microphone Assembly) NG --> See step 7 OK: Go to next step
  4. REPLACE TELEPHONE MICROPHONE ASSEMBLY Check that the malfunction disappears when a known good telephone microphone assembly is installed, refer to «REMOVAL»(ref-422543-S03322318472011092600000) . OK Malfunction disappears. NG --> See step 5 OK --> END (TELEPHONE MICROPHONE ASSEMBLY WAS DEFECTIVE)
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-422575-S39959037932011092600000)
  6. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»(ref-422543-S13822427872011092600000)
  7. REPLACE TELEPHONE MICROPHONE ASSEMBLY. Refer to «REMOVAL»(ref-422543-S03322318472011092600000)

This circuit provides power to the radio receiver assembly.

Scheme 151

Scheme 151: WIRING DIAGRAM
Scheme 151: WIRING DIAGRAM

This circuit provides power to the stereo component amplifier assembly.

Scheme 152

Scheme 152: WIRING DIAGRAM
Scheme 152: WIRING DIAGRAM

This circuit provides power to the multi-media interface ECU.

Scheme 153

Scheme 153: WIRING DIAGRAM
Scheme 153: WIRING DIAGRAM

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