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Audio / Video System (W/o Navigation) (Diagnostic Codes & Symptom Tests): Overview Lexus HS I

Entertainment Systems 49 illustrations ~8291 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 power switch on (IG) or (ACC). The communication condition with the device that the DTC shows cannot be obtained when the engine starts.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 power switch on (IG) 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 the 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 power switch on (IG) 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 power switch on (IG) 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 the 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 power 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 the 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 power 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 the 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 power switch on (IG) 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 the DTCs after the inspection is completed to confirm that no DTCs are output.

DTC No.DTC Detection Condition
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"Bluetooh" 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
63-10A mechanical error in the CD changer is detected while the CD is not being inserted or ejected.Radio receiver assembly
63-11CDs cannot be inserted or ejected.
63-12CD read problem occurs.
DTC No.DTC Detection ConditionTrouble Area
63-41An unsuitable disc is inserted.CD Radio receiver assembly
63-42The disc cannot be read.
DTC No.DTC Detection ConditionTrouble Area
63-43CD-ROM operation is abnormal.CD Radio receiver assembly
DTC No.DTC Detection ConditionTrouble Area
63-44Operation error in the CD mechanismRadio receiver assembly
63-48Excess current is present in the CD changer.
63-50Malfunction in insertion/ejection system
DTC No.DTC Detection ConditionTrouble Area
63-45CD cannot be ejected.Radio receiver assembly
63-51Mechanical error occurs during elevator operation.
63-52Error occurs in CD changer clamp.
DTC No.DTC Detection ConditionTrouble Area
63-46Scratches or dirt is found on CD surface or CD is set upside down.CD Radio receiver assembly
DTC No.DTC Detection ConditionTrouble Area
63-47Sensor detects that CD unit temperature is high (Over 80°C (176°F)).Radio receiver assembly
DTC No.DTC Detection Condition
63-78An error occurs during the decode process (MP3/WMA).
DTC No.DTC Detection ConditionTrouble Area
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.

This DTC is stored when a malfunction occurs in the speakers.

DTC No.DTC Detection ConditionTrouble Area
74-40A short is detected in the speaker output circuit.Wire harness or connector Speaker DCM (Telematics transceiver)*1 Stereo component amplifier assembly
  1. *1: w/ Manual (SOS) Switch

Scheme 200

Scheme 200: WIRING DIAGRAM
Scheme 200: WIRING DIAGRAM

Scheme 201

Scheme 201
Scheme 201

Scheme 202

Scheme 202: PROCEDURE
Scheme 202: PROCEDURE

Scheme 203

Scheme 203
Scheme 203

Scheme 204

Scheme 204
Scheme 204

Scheme 205

Scheme 205
Scheme 205

Scheme 206

Scheme 206
Scheme 206

Scheme 207

Scheme 207
Scheme 207

Scheme 208

Scheme 208
Scheme 208
  1. CHECK DTC Disconnect the F43 and F24 stereo component amplifier assembly connectors. Clear the DTCs and recheck for DTCs. Check if DTC 74-40 is output. OK DTC 74-40 is not output. NG --> See step 18 OK: Go to next step
  2. CHECK OPERATION Reconnect the F24 stereo component amplifier assembly connector. Check if DTC 74-40 is output. OK DTC 74-40 is not output. NG --> See step 9 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR Disconnect the F43 stereo component amplifier assembly connector, the F38 DCM (telematics transceiver)*1 and the I5, H5, G5, G3, K4, J4, K6, J6 speaker connectors. *1: w/ Manual (SOS) Switch 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 F43-3 (FL+) - Body ground Always 10 kohms or higher F43-8 (FL-) - Body ground Always 10 kohms or higher F43-10 (FR+) - Body ground Always 10 kohms or higher F43-9 (FR-) - Body ground Always 10 kohms or higher F43-4 (RL+) - Body ground Always 10 kohms or higher F43-11 (RL-) - Body ground Always 10 kohms or higher F43-5 (RR+) - Body ground Always 10 kohms or higher F43-12 (RR-) - Body ground Always 10 kohms or higher Measure the resistance between each of the front No. 1 speakers and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition I5-1 - Body ground Always 10 kohms or higher I5-2 - 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 speakers and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition K4-1 - Body ground Always 10 kohms or higher K4-2 - Body ground Always 10 kohms or higher J4-1 - Body ground Always 10 kohms or higher J4-2 - Body ground Always 10 kohms or higher w/ Manual (SOS) Switch Measure the resistance between the front No. 2 speaker RH and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition G3-3 (VR+) - Body ground Always 10 kohms or higher G3-4 (VR-) - Body ground Always 10 kohms or higher Measure the resistance between each of the front No. 1 speakers and the front No. 2 speakers to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition G5-1 (+) - I5-1 Always Below 1 ohms G5-2 (-) - I5-2 Always Below 1 ohms G3-1 (+) - H5-1 Always Below 1 ohms G3-2 (-) - H5-2 Always Below 1 ohms Measure the resistance between the front No. 2 speaker LH and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F43-3 (FL+) - G5-3 (TWL+) Always Below 1 ohms F43-8 (FL-) - G5-4 (TWL-) Always Below 1 ohms w/o Manual (SOS) Switch Measure the resistance between the front No. 2 speaker RH and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F43-10 (FR+) - G3-3 (VR+) Always Below 1 ohms F43-9 (FR-) - G3-4 (VR-) Always Below 1 ohms w/ Manual (SOS) Switch Measure the resistance between the DCM (telematics transceiver) and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F43-10 (FR+) - F38-2 (SPI+) Always Below 1 ohms F43-9 (FR-) - F38-3 (SPI-) Always Below 1 ohms w/ Manual (SOS) Switch Measure the resistance between the front No. 2 speaker RH and the DCM (telematics transceiver) to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F38-5 (SPO+) - G3-3 (VR+) Always Below 1 ohms F38-6 (SPO-) - G3-4 (VR-) Always Below 1 ohms Measure the resistance between each of the rear No. 2 speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F43-4 (RL+) - K6-3 (+TW) Always Below 1 ohms F43-11 (RL-) - K6-1 (-TW) Always Below 1 ohms F43-5 (RR+) - J6-3 (+TW) Always Below 1 ohms F43-12 (RR-) - J6-1 (-TW) Always Below 1 ohms Measure the resistance between each of the rear No. 2 speakers and the rear speakers to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition K6-4 (+) - K4-1 Always Below 1 ohms K6-2 (-) - K4-2 Always Below 1 ohms J6-4 (+) - J4-1 Always Below 1 ohms J6-2 (-) - J4-2 Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. INSPECT FRONT NO. 1 SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I5-1 - I5-2 Always 3.2 to 4.8 ohms H5-1 - H5-2 Always 3.2 to 4.8 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Front No. 1 Speaker) NG --> See step 12 OK: Go to next step
  5. INSPECT FRONT NO. 2 SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G5-3 (TWL+) - G5-4 (TWL-) Always 10 kohms or higher G3-3 (VR+) - G3-4 (VR-) Always 10 kohms or higher TEXT IN ILLUSTRATION *A for LH *B for RH *1 Component without harness connected (Front No. 2 Speaker) NG --> See step 13 OK: Go to next step
  6. INSPECT REAR SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition K4-1 - K4-2 Always 4 to 6 ohms J4-1 - J4-2 Always 4 to 6 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Rear Speaker) NG --> See step 15 OK: Go to next step
  7. INSPECT REAR NO. 2 SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition K6-3 (+TW) - K6-1 (-TW) Always 10 kohms or higher J6-3 (+TW) - J6-1 (-TW) Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Rear No. 2 Speaker) Proceed to the next step based on the inspection result. Result Result Proceed to OK (w/ Manual (SOS) Switch) A OK (w/o Manual (SOS) Switch) B NG C C --> See step 16 B --> See step 18 A: Go to next step
  8. INSPECT DCM (TELEMATICS TRANSCEIVER) Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F38-2 (SPI+) - F38-5 (SPO+) Always Below 1 ohms F38-3 (SPI-) - F38-6 (SPO-) Always Below 1 ohms F38-2 (SPI+) - F38-3 (SPI-) Always 10 kohms or higher F38-5 (SPO+) - F38-6 (SPO-) Always 10 kohms or higher F38-3 (SPI-) - Body ground Always 10 kohms or higher F38-6 (SPO-) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (DCM (Telematics Transceiver)) NG --> See step 19 OK --> See step 18
  9. CHECK HARNESS AND CONNECTOR Disconnect the F24 stereo component amplifier assembly connector and the L37, G2 speaker connectors. 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 F24-1 (WF1+) - Body ground Always 10 kohms or higher F24-5 (WF1-) - Body ground Always 10 kohms or higher F24-2 (WF2+) - Body ground Always 10 kohms or higher F24-6 (WF2-) - Body ground Always 10 kohms or higher F24-8 (CTR+) - Body ground Always 10 kohms or higher F24-7 (CTR-) - Body ground Always 10 kohms or higher Measure the resistance between the rear stereo component speaker and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F24-1 (WF1+) - L37-2 (WF1+) Always Below 1 ohms F24-5 (WF1-) - L37-1 (WF1-) Always Below 1 ohms F24-2 (WF2+) - L37-4 (WF2+) Always Below 1 ohms F24-6 (WF2-) - L37-3 (WF2-) Always Below 1 ohms Measure the resistance between the front No. 3 speaker and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F24-8 (CTR+) - G2-2 Always Below 1 ohms F24-7 (CTR-) - G2-1 Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  10. INSPECT FRONT NO. 3 SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G2-1 - G2-2 Always 4.8 to 7.2 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Front No. 3 Speaker) NG --> See step 14 OK: Go to next step
  11. INSPECT REAR STEREO COMPONENT SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L37-2 (WF1+) - L37-1 (WF1-) Always 2.4 to 3.6 ohms L37-4 (WF2+) - L37-3 (WF2-) Always 2.4 to 3.6 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Rear Stereo Component Speaker) NG --> See step 17 OK --> See step 18
  12. REPLACE FRONT NO. 1 SPEAKER. Refer to «REMOVAL»(ref-398277-S40152031092011051600000)
  13. REPLACE FRONT NO. 2 SPEAKER. Refer to «REMOVAL»(ref-398277-S02888460282011051600000)
  14. REPLACE FRONT NO. 3 SPEAKER. Refer to «REMOVAL»(ref-398277-S02888460282011051600000)
  15. REPLACE REAR SPEAKER. Refer to «REMOVAL»(ref-398277-S06794886652011051600000)
  16. REPLACE REAR NO. 2 SPEAKER. Refer to «REMOVAL»(ref-398277-S06794886652011051600000)
  17. REPLACE REAR STEREO COMPONENT SPEAKER. Refer to «REMOVAL»(ref-398277-S06734651162011051600000)
  18. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398277-S29782841752011051600000)
  19. REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to «REMOVAL»(ref-398300-S33003729062011051600000)
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 Radio receiver assembly
C0-41Short in antenna circuit
DTC No.DTC Detection ConditionTrouble Area
CB-10System microcomputer malfunctionMulti-media interface ECU "iPod" or USB device
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 209

Scheme 209: WIRING DIAGRAM
Scheme 209: WIRING DIAGRAM

Scheme 210

Scheme 210: PROCEDURE
Scheme 210: PROCEDURE

Scheme 211

Scheme 211
Scheme 211
  1. REPLACE USB DEVICE OR "iPod" Disconnect the USB device or "iPod" from the No. 1 stereo jack adapter assembly. Turn the power switch off. HINT: When this DTC has been stored, it is necessary to turn off the power switch to make it possible for the vehicle to recognize a new device when it is connected. Turn the power switch on (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-398303-S34272732162011051600000) . 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 F132-1 (UPI) - F132-4 (UJSG) Always 5 V TEXT IN ILLUSTRATION *1 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-398277-S18945814612011051600000)
  6. CHECK WIRE 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 F133-4 (UPO) - F132-1 (UPI) Always Below 1 ohms F133-1 (UESG) - F132-4 (UJSG) Always Below 1 ohms F132-1 (UPI) - Body ground Always 10 kohms or higher F132-4 (UJSG) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly) *2 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-398277-S19978363872011051600000)
DTC No.DTC Detection ConditionTrouble Area
CB-43When a non mass-storage class or incompatible protocol USB device is connected.Multi-media interface ECU USB device
CB-44When a USB device with an incompatible file system, corrupted or incompatible File Allocation Table (FAT) is connected.
CB-50"iPod" malfunctionMulti-media interface ECU "iPod"
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 deviceMulti-media interface ECU USB device
CB-46"iPod" control software malfunctionMulti-media interface ECU "iPod"
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

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 212

Scheme 212: WIRING DIAGRAM
Scheme 212: WIRING DIAGRAM

Scheme 213

Scheme 213: PROCEDURE
Scheme 213: 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 F4-40 (+S) and body ground. Turn the power switch on (IG). 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 (Scheme 213). 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 *1 Component with harness connected (Combination Meter Assembly) NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY) Disconnect the radio receiver assembly and combination meter assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F67-3 (SPD) - F4-40 (+S) Always Below 1 ohms NG --> See step 3 OK --> See step 5
  3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - JUNCTION CONNECTOR) Disconnect the radio receiver assembly connector. Disconnect the junction connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F67-3 (SPD) - F96-33 Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F96-33 - F96-53 Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (JUNCTION CONNECTOR) OK --> See step 5
  5. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»(ref-398277-S29815204222011051600000)
  6. GO TO METER / GAUGE SYSTEM. Refer to «Speed Signal Circuit»(ref-398261-S34359180092011051600000)

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 to 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 214

Scheme 214: WIRING DIAGRAM
Scheme 214: 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 215

Scheme 215: WIRING DIAGRAM
Scheme 215: WIRING DIAGRAM

If there is a short in a speaker circuit, the stereo component amplifier assembly detects the short and stops output to the speakers.

Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, DCM (telematics transceiver)*1 or speakers.

  1. *1: w/ Manual (SOS) Switch

Scheme 216

Scheme 216
Scheme 216

Scheme 217

Scheme 217
Scheme 217
  1. 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 speakers and the front No. 2 speakers to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition G5-1 (+) - I5-1 Always Below 1 ohms G5-2 (-) - I5-2 Always Below 1 ohms G3-1 (+) - H5-1 Always Below 1 ohms G3-2 (-) - H5-2 Always Below 1 ohms Measure the resistance between the front No. 2 speaker LH and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F43-3 (FL+) - G5-3 (TWL+) Always Below 1 ohms F43-8 (FL-) - G5-4 (TWL-) Always Below 1 ohms w/o Manual (SOS) Switch Measure the resistance between the front No. 2 speaker RH and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F43-10 (FR+) - G3-3 (VR+) Always Below 1 ohms F43-9 (FR-) - G3-4 (VR-) Always Below 1 ohms w/ Manual (SOS) Switch Measure the resistance between the DCM (telematics transceiver) and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F43-10 (FR+) - F38-2 (SPI+) Always Below 1 ohms F43-9 (FR-) - F38-3 (SPI-) Always Below 1 ohms w/ Manual (SOS) Switch Measure the resistance between the front No. 2 speaker RH and the DCM (telematics transceiver) to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F38-5 (SPO+) - G3-3 (VR+) Always Below 1 ohms F38-6 (SPO-) - G3-4 (VR-) Always Below 1 ohms Measure the resistance between each of the rear No. 2 speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F43-4 (RL+) - K6-3 (+TW) Always Below 1 ohms F43-11 (RL-) - K6-1 (-TW) Always Below 1 ohms F43-5 (RR+) - J6-3 (+TW) Always Below 1 ohms F43-12 (RR-) - J6-1 (-TW) Always Below 1 ohms Measure the resistance between each of the rear No. 2 speakers and the rear speakers to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition K6-4 (+) - K4-1 Always Below 1 ohms K6-2 (-) - K4-2 Always Below 1 ohms J6-4 (+) - J4-1 Always Below 1 ohms J6-2 (-) - J4-2 Always Below 1 ohms Measure the resistance between each of the rear stereo component speaker and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F24-1 (WF1+) - L37-2 (WF1+) Always Below 1 ohms F24-5 (WF1-) - L37-1 (WF1-) Always Below 1 ohms F24-2 (WF2+) - L37-4 (WF2+) Always Below 1 ohms F24-6 (WF2-) - L37-3 (WF2-) Always Below 1 ohms Measure the resistance between the front No. 3 speaker and the stereo component amplifier assembly to check for an open circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition F24-8 (CTR+) - G2-2 Always Below 1 ohms F24-7 (CTR-) - G2-1 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 F43-3 (FL+) - Body ground Always 10 kohms or higher F43-8 (FL-) - Body ground Always 10 kohms or higher F43-10 (FR+) - Body ground Always 10 kohms or higher F43-9 (FR-) - Body ground Always 10 kohms or higher F43-4 (RL+) - Body ground Always 10 kohms or higher F43-11 (RL-) - Body ground Always 10 kohms or higher F43-5 (RR+) - Body ground Always 10 kohms or higher F43-12 (RR-) - Body ground Always 10 kohms or higher F24-1 (WF1+) - Body ground Always 10 kohms or higher F24-5 (WF1-) - Body ground Always 10 kohms or higher F24-2 (WF2+) - Body ground Always 10 kohms or higher F24-6 (WF2-) - Body ground Always 10 kohms or higher F24-8 (CTR+) - Body ground Always 10 kohms or higher F24-7 (CTR-) - Body ground Always 10 kohms or higher Measure the resistance between each of the front No. 1 speakers and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition I5-1 - Body ground Always 10 kohms or higher I5-2 - 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 speakers and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition K4-1 - Body ground Always 10 kohms or higher K4-2 - Body ground Always 10 kohms or higher J4-1 - Body ground Always 10 kohms or higher J4-2 - Body ground Always 10 kohms or higher w/ Manual (SOS) Switch Measure the resistance between the front No. 2 speaker RH and body ground to check for a short circuit in the wire harness. Standard Resistance Tester Connection Condition Specified Condition G3-3 (VR+) - Body ground Always 10 kohms or higher G3-4 (VR-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. INSPECT FRONT NO. 1 SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I5-1 - I5-2 Always 3.2 to 4.8 ohms H5-1 - H5-2 Always 3.2 to 4.8 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Front No. 1 Speaker) NG --> See step 11 OK: Go to next step
  3. INSPECT FRONT NO. 2 SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G5-3 (TWL+) - G5-4 (TWL-) Always 10 kohms or higher G5-3 (TWL+) - G5-1 (+) Always Below 1 ohms G5-4 (TWL-) - G5-2 (-) Always Below 1 ohms G3-3 (VR+) - G5-4 (VR-) Always 10 kohms or higher G3-3 (VR+) - G5-1 (+) Always Below 1 ohms G3-4 (VR-) - G5-2 (-) Always Below 1 ohms TEXT IN ILLUSTRATION *A for LH *B for RH *1 Component without harness connected (Front No. 2 Speaker) NG --> See step 12 OK: Go to next step
  4. REPLACE FRONT NO. 2 SPEAKER Check that the malfunction disappears when a known good speaker is installed. Refer to «REMOVAL»(ref-398277-S02888460282011051600000) . OK Malfunction disappears. HINT: Connect all the connectors to the front No. 2 speakers 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 5 OK --> END (FRONT NO. 2 SPEAKER WAS DEFECTIVE)
  5. INSPECT FRONT NO. 3 SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition G2-1 - G2-2 Always 4.8 to 7.2 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Front No. 3 Speaker) NG --> See step 13 OK: Go to next step
  6. INSPECT REAR SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition K4-1 - K4-2 Always 4 to 6 ohms J4-1 - J4-2 Always 4 to 6 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Rear Speaker) NG --> See step 14 OK: Go to next step
  7. INSPECT REAR NO. 2 SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition K6-3 (+TW) - K6-1 (-TW) Always 10 kohms or higher K6-3 (+TW) - K6-4 (+) Always Below 1 ohms K6-1 (-TW) - K6-2 (-) Always Below 1 ohms J6-3 (+TW) - J6-1 (-TW) Always 10 kohms or higher J6-3 (+TW) - J6-4 (+) Always Below 1 ohms J6-1 (-TW) - J6-2 (-) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Rear No. 2 Speaker) NG --> See step 15 OK: Go to next step
  8. REPLACE REAR NO. 2 SPEAKER Check that the malfunction disappears when a known good speaker is installed. Refer to «REMOVAL»(ref-398277-S06794886652011051600000) . OK Malfunction disappears. HINT: Connect all the connectors to the rear No. 2 speakers that were disconnected. When there is a possibility that either the right or left rear 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 9 OK --> END (REAR NO. 2 SPEAKER WAS DEFECTIVE)
  9. INSPECT REAR STEREO COMPONENT SPEAKER Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L37-2 (WF1+) - L37-1 (WF1-) Always 2.4 to 3.6 ohms L37-4 (WF2+) - L37-3 (WF2-) Always 2.4 to 3.6 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Rear Stereo Component Speaker) Proceed to the next step based on the inspection result. Result Result Proceed to OK (w/ Manual (SOS) Switch) A OK (w/o Manual (SOS) Switch) B NG C C --> See step 16 B --> See step 17 A: Go to next step
  10. INSPECT DCM (TELEMATICS TRANSCEIVER) Resistance check Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F38-2 (SPI+) - F38-5 (SPO+) Always Below 1 ohms F38-3 (SPI-) - F38-6 (SPO-) Always Below 1 ohms F38-2 (SPI+) - F38-3 (SPI-) Always 10 kohms or higher F38-5 (SPO+) - F38-6 (SPO-) Always 10 kohms or higher F38-3 (SPI-) - Body ground Always 10 kohms or higher F38-6 (SPO-) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (DCM (Telematics Transceiver)) NG --> See step 18 OK --> See step 17
  11. REPLACE FRONT NO. 1 SPEAKER. Refer to «REMOVAL»(ref-398277-S40152031092011051600000)
  12. REPLACE FRONT NO. 2 SPEAKER. Refer to «REMOVAL»(ref-398277-S02888460282011051600000)
  13. REPLACE FRONT NO. 3 SPEAKER. Refer to «REMOVAL»(ref-398277-S02888460282011051600000)
  14. REPLACE REAR SPEAKER. Refer to «REMOVAL»(ref-398277-S06794886652011051600000)
  15. REPLACE REAR NO. 2 SPEAKER. Refer to «REMOVAL»(ref-398277-S06794886652011051600000)
  16. REPLACE REAR STEREO COMPONENT SPEAKER. Refer to «REMOVAL»(ref-398277-S06734651162011051600000)
  17. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398297-S29970953592011051600000)
  18. REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to «REMOVAL»(ref-398300-S33003729062011051600000)

The radio receiver assembly sends sound signals 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, DCM (telematics transceiver)*1 or speakers.

  1. *1: w/ Manual (SOS) Switch

Scheme 218

Scheme 218: WIRING DIAGRAM
Scheme 218: WIRING DIAGRAM

The multi-media interface ECU sends sound signals 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, DCM (telematics transceiver)*1 or speakers.

  1. *1: w/ Manual (SOS) Switch

Scheme 219

Scheme 219: WIRING DIAGRAM
Scheme 219: WIRING DIAGRAM

The No. 1 stereo jack adapter assembly sends 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, DCM (telematics transceiver)*1 or speakers.

  1. *1: w/ Manual (SOS) Switch

Scheme 220

Scheme 220: WIRING DIAGRAM
Scheme 220: WIRING DIAGRAM

Scheme 221

Scheme 221: PROCEDURE
Scheme 221: PROCEDURE

Scheme 222

Scheme 222
Scheme 222
  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 Tester Connection Condition Specified Condition F132-9 (AUXO) - F67-19 (AUXI) Always Below 1 ohms F132-6 (ARO) - F67-15 (ARI) Always Below 1 ohms F132-7 (ALO) - F67-17 (ALI) Always Below 1 ohms F132-8 (ASGN) - F67-16 (ASGN) Always Below 1 ohms F132-10 (AGND) - F67-18 (AGND) Always Below 1 ohms F132-9 (AUXO) - Body ground Always 10 kohms or higher F132-6 (ARO) - Body ground Always 10 kohms or higher F132-7 (ALO) - Body ground Always 10 kohms or higher F132-8 (ASGN) - Body ground Always 10 kohms or higher F132-10 (AGND) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Radio Receiver Assembly) *2 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-398303-S30861064802011051600000)

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

Scheme 223

Scheme 223: WIRING DIAGRAM
Scheme 223: WIRING DIAGRAM

Scheme 224

Scheme 224: PROCEDURE
Scheme 224: PROCEDURE

Scheme 225

Scheme 225
Scheme 225
  1. CHECK HARNESS AND CONNECTOR Disconnect the multi-media interface ECU connector. Disconnect the No. 1 stereo jack adapter assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F132-3 (UDO+) - F133-2 (UDI+) Always Below 1 ohms F132-2 (UDO-) - F133-3 (UDI-) Always Below 1 ohms F132-5 (UJSS) - F133-5 (UESS) Always Below 1 ohms F132-3 (UDO+) - Body ground Always 10 kohms or higher F132-2 (UDO-) - Body ground Always 10 kohms or higher F132-5 (UJSS) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Multi-media Interface ECU) *2 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-398303-S30861064802011051600000)

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 226

Scheme 226: WIRING DIAGRAM
Scheme 226: WIRING DIAGRAM

Scheme 227

Scheme 227: PROCEDURE
Scheme 227: PROCEDURE

Scheme 228

Scheme 228
Scheme 228
  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 F69-1 (MUTE) - Body ground Power switch on (ACC), audio system is playing --> Changing sources Above 2.5 V --> Below 0.5 V TEXT IN ILLUSTRATION *1 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 F66-7 (MUTE) - F69-1 (MUTE) Always Below 1 ohms F66-7 (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 F66-7 (MUTE) - Body ground Power switch on (ACC), audio system is playing Above 2.5 V TEXT IN ILLUSTRATION *1 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-398277-S29815204222011051600000)
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398303-S30861064802011051600000)
  6. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398277-S29782841752011051600000)

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 229

Scheme 229: WIRING DIAGRAM
Scheme 229: WIRING DIAGRAM

Scheme 230

Scheme 230: PROCEDURE
Scheme 230: PROCEDURE

Scheme 231

Scheme 231
Scheme 231
  1. INSPECT RADIO RECEIVER ASSEMBLY Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F82-6 (MUTE) - Body ground Power switch on (ACC), USB audio system is playing --> Mode is changing Above 2.5 V --> Below 0.5 V TEXT IN ILLUSTRATION *1 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 F82-6 (MUTE) - F79-6 (MUT1) Always Below 1 ohms F82-6 (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 F79-6 (MUT1) - Body ground Power switch on (ACC) Above 2.5 V TEXT IN ILLUSTRATION *1 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-398303-S30861064802011051600000)
  5. REPLACE MULTI-MEDIA INTERFACE ECU. Refer to «REMOVAL»(ref-398277-S19978363872011051600000)
  6. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»(ref-398277-S29815204222011051600000)

The DCM (telematics transceiver) sends a mute signal to the stereo component amplifier assembly.

The stereo component amplifier assembly controls the volume according to the mute signal from the DCM (telematics transceiver).

Scheme 232

Scheme 232: WIRING DIAGRAM
Scheme 232: WIRING DIAGRAM

Scheme 233

Scheme 233: PROCEDURE
Scheme 233: PROCEDURE

Scheme 234

Scheme 234
Scheme 234
  1. INSPECT DCM (TELEMATICS TRANSCEIVER) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F38-17 (MUTE) - Body ground Power switch on (ACC), audio system is playing --> Emergency call mode Above 3.5 V --> Below 1 V TEXT IN ILLUSTRATION *1 Component with harness connected (DCM (Telematics Transceiver)) NG --> See step 2 OK --> See step 4
  2. CHECK HARNESS AND CONNECTOR Disconnect the stereo component amplifier assembly connector and DCM (telematics transceiver) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F69-24 (TMUT) - F38-17 (MUTE) Always Below 1 ohms F69-24 (TMUT) - 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 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 F38-17 (MUTE) - Body ground Power switch on (ACC) Above 3.5 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to DCM (Telematics Transceiver)) NG --> See step 6 OK --> See step 5
  4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398303-S30861064802011051600000)
  5. REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to «REMOVAL»(ref-398300-S33003729062011051600000)
  6. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-398277-S29782841752011051600000)

Each audio system component connected to the AVC-LAN (communication bus) transfers the switch signals by the audio visual communication local area network.

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

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.

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 235

Scheme 235: WIRING DIAGRAM
Scheme 235: WIRING DIAGRAM
  1. w/o Manual (SOS) Switch Using this circuit, the radio receiver assembly sends power to the map light assembly (telephone microphone assembly), and the map light assembly sends microphone signals to the radio receiver assembly.
  2. w/ Manual (SOS) Switch Using this circuit, the DCM (telematics transceiver) sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the radio receiver assembly via the DCM (telematics transceiver). The radio receiver assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

Scheme 236

Scheme 236: WIRING DIAGRAM
Scheme 236: WIRING DIAGRAM

Scheme 237

Scheme 237: PROCEDURE
Scheme 237: PROCEDURE

Scheme 238

Scheme 238
Scheme 238

Scheme 239

Scheme 239
Scheme 239

Scheme 240

Scheme 240
Scheme 240

Scheme 241

Scheme 241
Scheme 241
  1. CONFIRM MODEL Choose the model to be inspected. Result Model Proceed to w/o Manual (SOS) Switch A w/ Manual (SOS) Switch B B --> See step 5 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR Disconnect the radio receiver assembly and map light assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F68-1 (SNS2) - P10-5 (SNS2) Always Below 1 ohms F68-3 (MACC) - P10-2 (ACC) Always Below 1 ohms F68-2 (MIN+) - P10-3 (MIC+) Always Below 1 ohms F68-5 (MIN-) - P10-4 (MIC-) Always Below 1 ohms F68-1 (SNS2) - Body ground Always 10 kohms or higher F68-3 (MACC) - Body ground Always 10 kohms or higher F68-2 (MIN+) - Body ground Always 10 kohms or higher F68-5 (MIN-) - Body ground Always 10 kohms or higher F68-6 (SGND) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. 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 F68-3 (MACC) - Body ground Power switch on (ACC) 4 to 6 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F68-6 (SGND) - Body ground Always Below 1 ohms F68-5 (MIN-) - Body ground Always Below 1 ohms Proceed to the next step based on the inspection result. Result Result Proceed to NG A OK B TEXT IN ILLUSTRATION *1 Component without harness connected (Radio Receiver Assembly) B --> See step 10 A --> See step 4
  4. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»(ref-398277-S29815204222011051600000)
  5. CHECK HARNESS AND CONNECTOR Disconnect the radio receiver assembly and map light assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F68-1 (SNS2) - P10-5 (SNS2) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  6. CHECK HARNESS AND CONNECTOR Disconnect the radio receiver assembly and DCM (telematics transceiver) connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F68-2 (MIN+) - F38-18 (MCO+) Always Below 1 ohms F68-5 (MIN-) - F38-19 (MCO-) Always Below 1 ohms F68-2 (MIN+) - Body ground Always 10 kohms or higher F68-5 (MIN-) - Body ground Always 10 kohms or higher F68-6 (SGND) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  7. CHECK HARNESS AND CONNECTOR Disconnect the DCM (telematics transceiver) and map light assembly connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F38-33 (MCVD) - P10-2 (ACC) Always Below 1 ohms F38-34 (MCI+) - P10-3 (MIC+) Always Below 1 ohms F38-35 (MCI-) - P10-4 (MIC-) Always Below 1 ohms F38-33 (MCVD) - Body ground Always 10 kohms or higher F38-34 (MCI+) - Body ground Always 10 kohms or higher F38-35 (MCI-) - Body ground Always 10 kohms or higher F38-32 (SGND) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  8. INSPECT RADIO RECEIVER ASSEMBLY Disconnect the radio receiver assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F68-6 (SGND) - Body ground Always Below 1 ohms F68-5 (MIN-) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Radio Receiver Assembly) NG --> See step 14 OK: Go to next step
  9. INSPECT DCM (TELEMATICS TRANSCEIVER) Reconnect the DCM (telematics transceiver) connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F38-33 (MCVD) - Body ground Power switch on (ACC) 4 to 6 V TEXT IN ILLUSTRATION *1 Component with harness connected (DCM (Telematics Transceiver)) NG --> See step 16 OK: Go to next step
  10. INSPECT MAP LIGHT ASSEMBLY Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P10-4 (MIC-) - P10-5 (SNS2) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Map Light Assembly) NG --> See step 13 OK: Go to next step
  11. INSPECT MAP LIGHT ASSEMBLY Reconnect the radio receiver assembly connector. Reconnect the DCM (telematics transceiver) connector (w/ Manual (SOS) Switch). Reconnect the map light assembly connector. Turn the power switch on (ACC). Connect an oscilloscope to terminals 3 (MIC+) and 4 (MIC-) of the P10 map light assembly connector. Check the waveform of the telephone microphone assembly using the oscilloscope. Result Result Proceed to A waveform synchronized with the voice input to the map light assembly is output A A waveform synchronized with the voice input to the map light assembly is not output B TEXT IN ILLUSTRATION *1 Component with harness connected (Map Light Assembly) B --> See step 13 A --> See step 12
  12. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398297-S29970953592011051600000)
  13. REPLACE TELEPHONE MICROPHONE ASSEMBLY Replace the telephone microphone assembly. Refer to «REMOVAL»(ref-398277-S31128223442011051600000) . Check if the same malfunction recurs. Result Result Proceed to Malfunction does not recur (returns to normal) A Malfunction recurs B B --> See step 15 A --> END
  14. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»(ref-398277-S29815204222011051600000)
  15. REPLACE MAP LIGHT ASSEMBLY. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information)
  16. REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to «REMOVAL»(ref-398300-S33003729062011051600000)

The radio receiver assembly uses this circuit to communicate with the main body ECU (multiplex network body ECU) via a direct line. The main body ECU (multiplex network body ECU) uses this circuit to send an auto dimmer signal to the radio receiver assembly. The main body ECU (multiplex network body ECU) detects the position of the light control switch according to the resistance. When the light control switch is set to the head or tail position, the resistance between the head or tail terminal and body ground is below 1 ohms. When the light control switch is set to the head or tail position, the main body ECU (multiplex network body ECU) sends an auto dimmer signal to the radio receiver assembly. When the radio receiver assembly receives an auto dimmer signal from the main body ECU (multiplex network body ECU), the radio receiver assembly causes instrument panel illumination to be dimmed.

Scheme 242

Scheme 242: WIRING DIAGRAM
Scheme 242: WIRING DIAGRAM

Scheme 243

Scheme 243: PROCEDURE
Scheme 243: PROCEDURE

Scheme 244

Scheme 244
Scheme 244
  1. INSPECT MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 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 F67-20 (ADIM) - Body ground Power switch on (IG), automatic light control sensor covered by hand, and light control switch tail or head position 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Radio Receiver Assembly) NG --> See step 3 OK: Go to next step
  2. INSPECT RADIO RECEIVER ASSEMBLY Disconnect the radio receiver assembly connector. Measure the resistance according to the value(s) in the table below Standard Resistance Tester Connection Condition Specified Condition F66-20 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Radio Receiver Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
  3. CHECK HARNESS AND CONNECTOR Disconnect the radio receiver assembly and main body ECU (multiplex network body ECU) connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F7-22 (ACAN) - F67-20 (ADIM) Always Below 1 ohms F67-20 (ADIM) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
  4. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»(ref-398277-S29815204222011051600000)
  5. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/body-electrical/#power-distribution-service-information)

This circuit provides power to the radio receiver assembly.

Scheme 245

Scheme 245: WIRING DIAGRAM
Scheme 245: WIRING DIAGRAM

This circuit provides power to the stereo component amplifier assembly.

Scheme 246

Scheme 246: WIRING DIAGRAM
Scheme 246: WIRING DIAGRAM

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

Scheme 247

Scheme 247: WIRING DIAGRAM
Scheme 247: WIRING DIAGRAM

Scheme 248

Scheme 248: PROCEDURE
Scheme 248: PROCEDURE
  1. INSPECT MULTI-MEDIA INTERFACE ECU Disconnect 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 F79-12 (+B) - F79-7 (GND) Power switch off 11 to 14 V F79-11 (ACC) - F79-7 (GND) Power switch on (ACC) 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Multi-media Interface ECU) NG --> See step 3 OK --> See step 2
  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398303-S30861064802011051600000)
  3. CHECK HARNESS AND CONNECTOR Disconnect the radio receiver assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F79-11 (ACC) - F82-11 (ACC) Always Below 1 ohms F79-12 (+B) - F82-12 (+B) Always Below 1 ohms F79-7 (GND) - F82-7 (GND) Always Below 1 ohms F79-11 (ACC) - Body ground Always 10 kohms or higher F79-12 (B+) - Body ground Always 10 kohms or higher F79-7 (GND) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 2

See also:
• REMOVAL
• REMOVAL

More articles — Audio / Video System (W/o Navigation) (Diagnostic Codes & Symptom Tests)