Audio / Visual: Overview Lexus RX II facelift

DESCRIPTION

DTC TROUBLE DETECTION

HINT

After the inspection is completed, clear the DTCs.

1. REPLACE RADIO RECEIVER NEXT: END

DTC TROUBLE DETECTION

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

Note. Be sure to read DESCRIPTION before performing the following procedures.

1. CHECK "RADIO RECEIVER COMMUNICATION ERROR" IN FLOW CHART Refer to the «RADIO RECEIVER COMMUNICATION ERROR»(ref-236035-S07381846982006062900000). END

DTC TROUBLE DETECTION

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

Note. Be sure to read DESCRIPTION before performing the following procedures.

Scheme 1

Scheme 2

Scheme 3

1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT Refer to the «RADIO RECEIVER POWER SOURCE CIRCUIT»(ref-236035-S13458846122006062900000). If the power source circuit is operating normally, proceed to the next step.
2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component which has stored this code. Component Table COMPONENT TABLE Component Physical address Stereo Component Amplifier 440 Multi-display Controller 1F6 HINT: "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration. For details of the DTC display, refer to the " «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ".
3. CHECK POWER SOURCE CIRCUIT OF THE COMPONENT WHICH HAS STORED THIS CODE Inspect the power source circuit of the component which has stored this code. If the power source circuit is operating normally, proceed to the next step. Component Table COMPONENT REFERENCE TABLE Component Proceed to Stereo Component Amplifier «STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT»(ref-236035-S23525356502006062900000) Multi-display Controller «MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT»(ref-236035-S34519777362006062900000)
4. INSPECT RADIO RECEIVER Disconnect the radio receiver connector. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ATX+(R2-5) - ATX-(R2-15) Always 60 to 80 ohms TX+(R3-9) - TX-(R3-10) Always 60 to 80 ohms TX+(R4-9) - TX-(R4-10) Always 60 to 80 ohms NG: REPLACE RADIO RECEIVER OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) HINT: For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S42023635302006062900000) ". Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component which has stored this code. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this code. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. REPLACE COMPONENT WHICH HAS STORED THIS CODE Replace the component which has stored this code with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE RADIO RECEIVER OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

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

Note. Be sure to read DESCRIPTION before performing the following procedures.

Scheme 4

1. CHECK FOR DTC OF OTHER COMPONENTS Check if the component shown by the sub-code is displayed in the check result of the other components. Check if "01-DC" is output for the other components. If "01-DC" is output for any other components, AV check if the same physical address is displayed. Result 01-DC OUTPUT RESULT Result Proceed to "01-DC" is output and the same physical address is displayed A "01-DC" is not output or the same physical address is not displayed B HINT: For the list of the components shown by sub-codes, refer to the table in step 2. B: Go to step 4 A: Go to next step
2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component which has stored this code. Component Table COMPONENTS PHYSICAL ADDRESS Component Physical address Stereo Component Amplifier 440 Multi-display Controller 1F6 Radio receiver 190 HINT: "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration. For details of the DTC display, refer to the " «DTC CHECK/ CLEAR»(ref-236035-S01594093612006062900000) ".
3. CHECK COMPONENT WHICH HAS STORED THIS CODE Select the component which has stored this code. Component Table COMPONENT REFERENCE TABLE Component Proceed to Stereo Component Amplifier «STEREO COMPONENT AMPLIFIER COMMUNICATION ERROR»(ref-236035-S30939615912006062900000) Multi-display Controller «MULTI-DISPLAY CONTROLLER COMMUNICATION ERROR»(ref-236035-S38067953422006062900000) Radio receiver «RADIO RECEIVER COMMUNICATION ERROR»(ref-236035-S07381846982006062900000) NEXT: END
4. CLEAR DTC Clear the DTC (See «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ). HINT: If "01-DC" is output for only one component, this may not indicate a malfunction.
5. RECHECK DTC Recheck the DTC and check if the same trouble code occurs again. OK: Malfunction disappears. NG: Go to step 3 OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

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

Note. Be sure to read DESCRIPTION before performing the following procedures.

Scheme 5

Scheme 6

Scheme 7

1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT Refer to the «RADIO RECEIVER POWER SOURCE CIRCUIT»(ref-236035-S13458846122006062900000). If the power source circuit is operating normally, proceed to the next step.
2. INSPECT RADIO RECEIVER Disconnect the radio receiver connector. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ATX+(R2-5) - ATX-(R2-15) Always 60 to 80 ohms TX+(R3-9) - TX-(R3-10) Always 60 to 80 ohms TX+(R4-9) - TX-(R4-10) Always 60 to 80 ohms NG: REPLACE RADIO RECEIVER OK: Go to next step
3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component which has stored this code. Component Table COMPONENTS PHYSICAL ADDRESS Component Physical address Stereo Component Amplifier 440 Multi-display Controller 1F6 HINT: "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration. For details of the DTC display, refer to the " «DTC CHECK/ CLEAR»(ref-236035-S01594093612006062900000) ".
4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) HINT: For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S42023635302006062900000) ". Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component which has stored this code. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this code. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. REPLACE RADIO RECEIVER Replace the radio receiver with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

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

Note. Be sure to read DESCRIPTION before performing the following procedures.

Scheme 8

Scheme 9

Scheme 10

1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT Refer to the «RADIO RECEIVER POWER SOURCE CIRCUIT»(ref-236035-S13458846122006062900000). If the power source circuit is operating normally, proceed to the next step.
2. INSPECT RADIO RECEIVER Disconnect the radio receiver connector. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ATX+(R2-5) - ATX-(R2-15) Always 60 to 80 ohms TX+(R3-9) - TX-(R3-10) Always 60 to 80 ohms TX+(R4-9) - TX-(R4-10) Always 60 to 80 ohms NG: REPLACE RADIO RECEIVER OK: Go to next step
3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component which has stored this code. Component Table COMPONENTS PHYSICAL ADDRESS Component Physical address Stereo Component Amplifier 440 Multi-display Controller 1F6 HINT: "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration. For details of the DTC display, refer to the " «DTC CHECK/ CLEAR»(ref-236035-S01594093612006062900000) ".
4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) HINT: For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S42023635302006062900000) ". Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component which has stored this code. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this code. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. REPLACE RADIO RECEIVER Replace the radio receiver with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. REPLACE RADIO RECEIVER NEXT: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. REPLACE RADIO RECEIVER NEXT: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. PRESS "EJECT" AND CHECK OPERATION Press the cassette tape EJECT switch of the radio receiver for 2 seconds or more and check that the cassette tape is ejected. OK: Cassette tape is ejected. NG: REPLACE RADIO RECEIVER OK: Go to next step
2. CHECK CASSETTE TAPE Check that the ejected cassette tape does not have a peeling label, cassette body deformation or other problems. OK: No problem with cassette tape. NG: CASSETTE TAPE IS FAULTY OK: Go to next step
3. REPLACE CASSETTE TAPE WITH ANOTHER AND RECHECK Replace the cassette tape with a normal one and check if the same problem occurs again. Clear the DTC (See «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ). Recheck DTCs and check if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER OK: CASSETTE TAPE IS FAULTY

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

Scheme 11

1. CLEAN HEAD AND CHECK OPERATION Head cleaning Raise the cassette door with your finger. Using a pencil or similar object, push in the guide. Using a cleaning pen or cotton applicator soaked in cleaner, clean the head surface, pinch rollers and capstans. Clear the DTC (See «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ). Recheck DTCs and check if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER OK: HEAD IS DIRTY

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. CLEAR DTC Clear the DTC (See «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ).
2. RECHECK DTC Recheck DTCs and check if the same trouble occurs again. HINT: If DTCs are detected frequently, replace the radio receiver. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. REPLACE RADIO RECEIVER NEXT: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. CHECK RADIO RECEIVER Check if a disc is inserted. OK: A disc is inserted. OK: REPLACE RADIO RECEIVER NG: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

Scheme 12

Scheme 13

1. DISC CLEANING Disc cleaning If dirt is on the disc surface, wipe it with a soft cloth from inside to outside in a radial direction. NOTE: Do not use conventional record cleaner or antistatic preservative.
2. CHECK DISC Check that the disc is not deformed or cracked. OK: No deformation or cracks on the disc. NG: DISC IS FAULTY OK: Go to next step
3. REPLACE DISC WITH ANOTHER AND RECHECK Replace the disc with another and recheck. Replace the disc with another normal one. Clear the DTC (See «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ). Recheck DTCs and check if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. CHECK IF A PROPER CD IS INSERTED Make sure that the CD is a normal audio CD, and that it is not deformed, flawed, stained, burred or has any other defects. OK: Normal audio CD HINT: Translucent or uniquely-shaped CDs cannot be played. CDs for personal computers (with music recorded in) and CD-Rs cannot be played. For vehicles made for Europe, an adapter is not required to play 8 cm (3.2 in.) CDs. For vehicles made for countries except Europe, use an adapter to play 8 & cm (3.2 in.) CDs. NG: CD IS FAULTY OK: Go to next step
2. REPLACE CD WITH ANOTHER AND RECHECK Replace the CD with another and recheck. Replace the CD with another normal one. Clear the DTC (See «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ). Recheck DTCs and check if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. CLEAR DTC Clear the DTC (See «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ).
2. RECHECK DTC Recheck DTCs and check if the same trouble occurs again. HINT: If DTCs are detected frequently, replace the radio receiver. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. CHECK RADIO RECEIVER Check if a disc can be changed, inserted or ejected normally. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. CHECK THAT CD IS INSERTED PROPERLY Check whether or not the CD is inserted upside down. OK: CD is properly inserted. NG: SET CD PROPERLY OK: Go to next step
2. DISC CLEANING Disc cleaning If dirt is on the disc surface, wipe it with a soft cloth from inside to outside in a radial direction. NOTE: Do not use conventional record cleaner or antistatic preservative.
3. CHECK DISC Check that the disc is not deformed or cracked. OK: No deformation or cracks on the disc. NG: DISC IS FAULTY OK: Go to next step
4. REPLACE DISC WITH ANOTHER AND RECHECK Replace the disc with another and recheck. Replace the disc with another normal one. Clear the DTC (See «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ). Recheck DTCs and check if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

After the inspection is completed, clear the DTCs.

1. CHECK RADIO RECEIVER Park the vehicle in a cool place. Check that the temperature of the radio receiver becomes sufficiently low, and start the engine. Check that the malfunction disappears. OK: Malfunction disappears. NG: REPLACE RADIO RECEIVER OK: END

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

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

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

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

Scheme 14

Note. The vehicle is equipped with an SRS (Supplemental Restraint System) such as airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System (See PRECAUTION ).

Scheme 15

Scheme 16

Scheme 17

1. INSPECT RADIO RECEIVER Disconnect the radio receiver connector R4. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition SW1 - SWG No switch is pushed Approx. 100 kohms SW1 - SWG SEEK+ switch: push Approx. 0 ohms SW1 - SWG SEEK- switch: push Approx. 0.3 kohms SW1 - SWG VOL+ switch: push Approx. 1 kohms SW1 - SWG VOL- switch: push Approx. 3.2 kohms SW2 - SWG No switch is pushed Approx. 100 kohms SW2 - SWG MODE switch: push Approx. 0 ohms NG: Go to step 2 OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL
2. INSPECT STEERING PAD SWITCH LH Disconnect the steering pad switch LH connector. Measure the resistance according to the values in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition AU1 - EAU No switch is pushed Approx. 100 kohms AU1 - EAU SEEK+ switch: push Approx. 0 ohms AU1 - EAU SEEK- switch: push Approx. 0.3 kohms AU1 - EAU VOL+ switch: push Approx. 1 kohms AU1 - EAU VOL- switch: push Approx. 3.2 kohms AU2 - EAU No switch is pushed Approx. 100 kohms AU2 - EAU MODE switch: push Approx. 0 ohms NG: REPLACE STEERING PAD SWITCH LH OK: Go to next step.
3. INSPECT SPIRAL CABLE Disconnect the steering pad switch and spiral cable connectors. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition EAU - EAU Always Below 1 ohms AU1 - AU1 Always Below 1 ohms AU2 - AU2 Always Below 1 ohms OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER) NG: REPLACE SPIRAL CABLE

Power is supplied to the radio receiver illumination when the light control switch is in the TAIL or HEAD position.

Scheme 18

Scheme 19

Scheme 20

Scheme 21

1. CHECK ILLUMINATION Check if the illumination for the radio receiver, headlight cleaner switch, glove box or others (seat heater switch, cigarette lighter, etc.) comes on when the light control switch is turned to the HEAD or TAIL position. Result RADIO RECEIVER ILLUMINATION RESULT Result Proceed to Illumination comes on for all components except radio receiver. A Illumination comes on only for glove box and steering pad switch. B No illumination comes on (seat heater switch, cigarette lighter, glove box, etc.). C B: Go to step 4 C: GO TO «LIGHTING SYSTEM»(ref-236032-S21707707892006062900000) A: Go to next step.
2. INSPECT RADIO RECEIVER Disconnect the radio receiver connector R2. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition ILL+ - Body ground Light control SW HEAD or TAIL 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMBINATION METER) Disconnect the radio receiver connector R2 and combination meter connector C8. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester connection Condition Specified condition ILL- (R2-12) - C8-2 Always Below 1 ohms ILL- (R2-12) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL
4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMBINATION METER) Disconnect the radio receiver connector R2 and combination meter connector C8. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ILL- (R2-12) - C8-2 Always Below 1 ohms ILL- (R2-12) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: GO TO «COMBINATION METER SYSTEM»(ref-236027-S07965956162006062900000)

The sound signal that has been amplified by the stereo component amplifier is sent to the speakers from the stereo component amplifier through this circuit.

As for the vehicle with a navigation system, the sound signal on the driver's side is sent to the navigation ECU from the stereo component amplifier.

If there is a short in this circuit, the stereo component amplifier detects it 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 or speaker.

Standard System

There are two cases when a short is detected.

1. When a short is detected in the front No.1 speaker circuit, sound cannot be heard only from the front No.1 speaker.
2. When a short is detected in any circuit other than the front No.1 speaker circuit, sound cannot be heard from all speakers including the front No.1 speaker.

Mark Levinson System

When a short is detected in the speaker circuit, sound cannot be heard from all speakers.

Scheme 22

Scheme 23

Note. If the vehicle is equipped with the navigation system, proceed to the flow chart "Driver Side Speaker Circuit" for troubleshooting of the front stereo component speaker and front No.2 speaker on the driver side.

Scheme 24

1. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER) Disconnect the connectors shown in the illustration from the stereo component amplifier and speakers. Measure the resistance between each of the front No.1 speakers and the stereo component amplifier to check for an open circuit in the wire harness. Standard resistance: Below 1 ohms Measure the resistance between each of the front No.2 speakers (except the center speaker) and the front stereo component speaker to check for an open circuit in the wire harness. Standard resistance: Below 1 ohms Measure the resistance between each of the front stereo component speakers and the stereo component amplifier to check for an open circuit in the wire harness. Standard resistance: Below 1 ohms Mark Levinson System: Measure the resistance between the front No.2 speaker (center speaker) and the stereo component amplifier to check for an open circuit in the wire harness. Standard resistance: Below 1 ohms Measure the resistance between each of the rear speakers and the stereo component amplifier to check for an open circuit in the wire harness. Standard resistance: Below 1 ohms Measure the resistance between each speaker and body ground to check for a short circuit in the wire harness. Standard resistance: 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 between the terminals of the speakers. NOTE: The speakers should not be removed for checking. Standard resistance: Standard system: Approximately 2 ohms Mark Levinson system: Approximately 7 to 9 ohms NG: REPLACE FRONT NO. 1 SPEAKER OK: Go to next step.
3. INSPECT FRONT NO. 2 SPEAKER Check that the malfunction disappears when another speaker in good condition is installed. Standard: Malfunction disappears. HINT: Connect all the connectors to the speakers. When there is a possibility that either the right or left front speaker is detective, inspect by interchanging the right one with the left one. OK: REPLACE FRONT NO. 2 SPEAKER NG: Go to next step.
4. INSPECT FRONT STEREO COMPONENT SPEAKER Check that the malfunction disappears when another speaker in good condition is installed. Standard: Malfunction disappears. HINT: Connect all the connectors to the speakers. 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. OK: REPLACE FRONT STEREO COMPONENT SPEAKER NG: Go to next step.
5. INSPECT REAR SPEAKER Resistance check. Measure the resistance between the terminals of the speakers. NOTE: The speakers should not be removed for checking. Standard resistance: Standard system: Approximately 4 ohms Mark Levinson system: Approximately 14 to 18 ohms NG: REPLACE REAR SPEAKER OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

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

The sound signal that has been sent is amplified by the stereo component amplifier, 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 or speakers.

Scheme 25

Scheme 26

1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) Disconnect the connectors from the radio receiver and stereo component amplifier. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition L+ - L+ Always Below 1 ohms L- - L- Always Below 1ohms R+ - R+ Always Below 1ohms R- - R- Always Below 1ohms SLD - SLD or SGND Always Below 1 ohms L+ - Body ground Always 10 kohms or higher L- - Body ground Always 10 kohms or higher R+ - Body ground Always 10 kohms or higher R- - Body ground Always 10 kohms or higher SLD - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

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

The sound signal that has been sent is amplified by the stereo component amplifier, 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 or speakers.

Scheme 27

Scheme 28

Scheme 29

1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY CONTROLLER) Disconnect the connectors from the multi-display controller and radio receiver. Measure the resistance according to the value table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition CDR+ - R+ Always Below 1 ohms CDR- - R- Always Below 1 ohms CDL+ - L+ Always Below 1 ohms CDL- - L- Always Below 1 ohms R+ - Body ground Always 10 kohms or higher R- - Body ground Always 10 kohms or higher L+ - Body ground Always 10 kohms or higher L- - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. INSPECT MULTI-DISPLAY CONTROLLER Reconnect the multi-display controller connector. Check the waveform according to the conditions in the table below. Standard TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Condition Specified Condition R+ - Body ground Voice sound is being produced A waveform synchronized with sound is output R- - Body ground Voice sound is being produced A waveform synchronized with sound is output L+ - Body ground Voice sound is being produced A waveform synchronized with sound is output L- - Body ground Voice sound is being produced A waveform synchronized with sound is output NG: REPLACE MULTI-DISPLAY CONTROLLER OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This circuit sends a signal to the stereo component amplifier 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 is normal, no sound, or only an extremely small sound, can be produced.

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Scheme 34

1. INSPECT STEREO COMPONENT AMPLIFIER Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition MUTE - Body ground Turn ignition switch to ACC, Audio system is playing --> Changing Above 3.5 V --> Below 1 V NG: Go to step 2 OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL
2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) Disconnect the connectors from the radio receiver and stereo component amplifier. Measure the resistance according to the values in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition MUTE - MUTE Always Below 1 ohms 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 Connect the connector to the radio receiver. Measure the voltage according to the value in the table below. Standard voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition MUTE - Body ground Turn ignition switch to ACC Above 3.5 V OK: REPLACE STEREO COMPONENT AMPLIFIER (STANDARD SYSTEM) OK: REPLACE STEREO COMPONENT AMPLIFIER (MARK LEVINSON SYSTEM) NG: REPLACE RADIO RECEIVER

This circuit sends a mute signal to the stereo component amplifier to enable the voice on the phone to be heard clearly when the cellular phone is used.

If there is an open in the circuit, no sound can be produced from the speakers while the cellular phone is being used.

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

Scheme 35

Scheme 36

Scheme 37

Scheme 38

Scheme 39

1. INSPECT STEREO COMPONENT AMPLIFIER Measure the voltage according to the value in the table below. Standard voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition N-MU - Body ground Turn ignition switch to ACC, Audio system is playing --> Navigation voice is produced Above 3.5 V --> Below 1 V NG: Go to step 2 OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL
2. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - STEREO COMPONENT AMPLIFIER) Disconnect the connectors from the navigation ECU and stereo component amplifier. Measure the resistance according to the values in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition MUT2 - N-MU Always Below 1 ohms MUT2 - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT NAVIGATION ECU Connect the connector to the stereo component amplifier. Measure the voltage according to the value in the table below. Standard voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition MUT2 - Body ground Turn ignition switch to ACC Avove 3.5 V NG: REPLACE STEREO COMPONENT AMPLIFIER (STANDARD SYSTEM) NG: REPLACE STEREO COMPONENT AMPLIFIER (MARK LEVINSON SYSTEM) OK: REPLACE NAVIGATION ECU

Each unit of the audio system connected to the AVC-LAN (communication bus) transfers the signal of each switch by communication.

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

Scheme 40

Scheme 41

1. INSPECT RADIO RECEIVER Disconnect the radio receiver connectors. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ATX+ (R2-5) - ATX-(R2-15) Always 60 to 80 ohms TX+ (R3-9) - TX- (R3-10) Always 60 to 80 ohms TX+ (R4-9) - TX- (R4-10) Always 60 to 80 ohms NG: REPLACE RADIO RECEIVER OK: Go to next step
2. CHECK HARNESS AND CONNECTOR HINT: For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S42023635302006062900000) ". Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits. Check for an open or short in all AVC-LAN circuits. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This circuit is necessary for the ASL (Auto Sound Leveliser) built into the stereo component amplifier. Speed signals are received from the combination meter and used for the ASL.

The ASL function automatically adjusts the sound data in order to enable hearing the clear audio sound even when vehicle noise increases (as vehicle noise increases, the volume is turned up etc.). Standard System: Speed signals and a microphone for the ASL built into the stereo component amplifier are used.

Mark Levinson System: Speed signals are used.

HINT

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

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

1. CHECK OPERATION OF SPEEDOMETER Drive the vehicle and check if the function of the speedometer on the combination meter is normal. OK: Actual vehicle speed and the speed indicated on the speedometer are the same. HINT: The vehicle speed sensor is functioning normally when the indication on the speedometer is normal. NG: CHECK COMBINATION METER OK: Go to next step
2. INSPECT STEREO COMPONENT AMPLIFIER Standard System: Disconnect the stereo component amplifier connector S29. Mark Levinson System: Disconnect the stereo component amplifier connector S27. Measure the voltage. Jack up either one of the drive wheels. Move the shift lever to the neutral position. Turn the ignition switch to the ON position. Measure the voltage between terminal SPD of the stereo component amplifier and body ground when the drive wheels are turned slowly. OK: Voltage pulses as shown in the illustration. NG: Go to step 4 OK: Go to next step
3. CHECK SYSTEM TYPE Choose the type to be inspected. Result SYSTEM TYPE RESULT Type Proceed to Standard System A Mark Levinson System B B: REPLACE STEREO COMPONENT AMPLIFIER (MARK LEVINSON SYSTEM) A: REPLACE STEREO COMPONENT AMPLIFIER (STANDARD SYSTEM)
4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - STEREO COMPONENT AMPLIFIER) Standard System: Disconnect the stereo component amplifier connector S29 and combination meter connector C8. Mark Levinson System: Disconnect the stereo component amplifier connector S27 and combination meter connector C8. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition SPD - C8-6 Ignition switch OFF Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (COMBINATION METER - STEREO COMPONENT AMPLIFIER) Standard System: Disconnect the stereo component amplifier connector S29 and combination meter connector C8. Mark Levinson System: Disconnect the stereo component amplifier connector S27 and combination meter connector C8. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition SPD - Body ground Ignition switch OFF 10 kohms or higher HINT: If the resistance between terminal SPD and body ground is less than 10 kohms, there may be a short in a wire harness, connector, or ECU. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR CHECK EACH ECU OK: REPLACE COMBINATION METER

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

Scheme 48

Scheme 49

Scheme 50

1. CHECK NAVIGATION VOICE GUIDANCE Check if navigation voice guidance is heard from the speaker on the driver's side. OK: Voice guidance is heard. NG: GO TO «NAVIGATION SYSTEM»(ref-236036-S24383003572006062900000) OK: Go to next step
2. INSPECT NAVIGATION ECU Disconnect the navigation ECU connector N3. Measure the resistance according to the values in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition AUI+ - AUO+ Always Below 1 ohms AUI- - AUO- Always Below 1 ohms NG: REPLACE NAVIGATION ECU OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - STEREO COMPONENT AMPLIFIER) Disconnect the connector from the navigation ECU and stereo component amplifier. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition AUI+ - TFL+ ( (1) ), FL+ ( (2) ) Always Below 1 ohms AUI- - TFL-( (1) ), FL-( (2) ) Always Below 1 ohms AUI+ - Body ground Always 10 kohms or higher AUI- - Body ground Always 10 kohms or higher (1) Mark Levinson System (2) Standard System NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

The multiplex network body ECU sends a panel illumination signal to the radio receiver through this circuit.

The multiplex network body ECU determines the ambient brightness based on the light level detected by the automatic light control sensor and performs dim control.

Scheme 51

Scheme 52

Scheme 53

1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTIPLEX NETWORK BODY ECU) Disconnect the radio receiver connector R4 and multiplex network body ECU connector B5. Measure the resistance according to the values in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ADIM - ACAN Always Below 1 ohms ADIM - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. INSPECT RADIO RECEIVER Connect the multiplex network body ECU connector. Turn the ignition switch to the ON position. Turn the light control switch to the TAIL or HEAD position. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition ADIM - Body ground Light control switch in TAIL or HEAD 10 to 14 V NG: GO TO «LIGHTING SYSTEM»(ref-236032-S21707707892006062900000) OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

Scheme 54

Scheme 55

Scheme 56

1. IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component shown by the sub-code. HINT: "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration. For details of the DTC display, refer to the " «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ".
2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE Inspect the power source circuit of the component shown by the sub-code. If the power source circuit is operating normally, proceed to the next step. Component Table COMPONENT REFERENCE TABLE Component Proceed to Stereo component amplifier (440) «STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT»(ref-236035-S23525356502006062900000) Multi-display controller (1F6) «MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT»(ref-236035-S34519777362006062900000)
3. INSPECT RADIO RECEIVER Disconnect the radio receiver connector. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ATX+(R2-5) - ATX-(R2-15) Always 60 to 80 ohms TX+(R3-9) - TX-(R3-10) Always 60 to 80 ohms TX+(R4-9) - TX-(R4-10) Always 60 to 80 ohms NG: REPLACE RADIO RECEIVER OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT SHOWN BY SUB-CODE) HINT: Start the check from the circuit that is near the component shown by the sub-code first. For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S42023635302006062900000) ". Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component shown by the sub-code. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component shown by the sub-code. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. REPLACE COMPONENT SHOWN BY SUB-CODE Replace the component shown by the sub-code with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE RADIO RECEIVER OK: END

Scheme 57

Scheme 58

Scheme 59

1. IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component shown by the sub-code. HINT: "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration. For details of the DTC display, refer to the " «DTC CHECK/ CLEAR»(ref-236035-S01594093612006062900000) ".
2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE Inspect the power source circuit of the component shown by the sub-code. If the power source circuit is operating normally, proceed to the next step. Component Table COMPONENT REFERENCE TABLE Component Proceed to Multi-display controller (1F6) «MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT»(ref-236035-S34519777362006062900000) Radio receiver (190) «RADIO RECEIVER POWER SOURCE CIRCUIT»(ref-236035-S13458846122006062900000)
3. INSPECT RADIO RECEIVER Disconnect the radio receiver connector. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ATX+(R2-5) - ATX-(R2-15) Always 60 to 80 ohms TX+(R3-9) - TX-(R3-10) Always 60 to 80 ohms TX+(R4-9) - TX-(R4-10) Always 60 to 80 ohms NG: REPLACE RADIO RECEIVER OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - COMPONENT SHOWN BY SUB-CODE) HINT: Start the check from the circuit that is near the component shown by the sub-code first. For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S42023635302006062900000) ". Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the stereo component amplifier and the component shown by the sub-code. Check for an open or short in the AVC-LAN circuit between the stereo component amplifier and the component shown by the sub-code. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. REPLACE COMPONENT SHOWN BY SUB-CODE Replace the component shown by the sub-code with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE STEREO COMPONENT AMPLIFIER (STANDARD SYSTEM) NG: REPLACE STEREO COMPONENT AMPLIFIER (MARK LEVINSON SYSTEM) OK: END

Scheme 60

Scheme 61

Scheme 62

1. IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE Enter the diagnostic mode. Press the preset switch "3" to change to "Detailed Information Mode". Identify the component shown by the sub-code. HINT: "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration. For details of the DTC display, refer to the " «DTC CHECK/ CLEAR»(ref-236035-S01594093612006062900000) ".
2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE Inspect the power source circuit of the component shown by the sub-code. If the power source circuit is operating normally, proceed to the next step. Component Table COMPONENT REFERENCE TABLE Component Proceed to Stereo component amplifier (440) «STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT»(ref-236035-S23525356502006062900000) Radio receiver (190) «RADIO RECEIVER POWER SOURCE CIRCUIT»(ref-236035-S13458846122006062900000)
3. INSPECT RADIO RECEIVER Disconnect the radio receiver connector. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ATX+(R2-5) - ATX-(R2-15) Always 60 to 80 ohms TX+(R3-9) - TX-(R3-10) Always 60 to 80 ohms TX+(R4-9) - TX-(R4-10) Always 60 to 80 ohms NG: REPLACE RADIO RECEIVER OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROLLER - COMPONENT SHOWN BY SUB-CODE) HINT: Start the check from the circuit that is near the component shown by the sub-code first. For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S42023635302006062900000) ". Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display controller and the component shown by the sub-code. Check for an open or short in the AVC-LAN circuit between the multi-display controller and the component shown by the sub-code. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. REPLACE COMPONENT SHOWN BY SUB-CODE Replace the component shown by the sub-code with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE MULTI-DISPLAY CONTROLLER OK: END

This circuit provides power to the radio receiver.

Scheme 63

Scheme 64

1. INSPECT RADIO RECEIVER Disconnect the radio receiver R2 connector. Measure the resistance according to the value in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition GND - Body ground Always Below 1 ohms Measure the voltage according to the values in the table below. Standard voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition B - GND Always 10 to 14 V ACC - GND Ignition SW ACC 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This circuit provides power to the stereo component amplifier.

Scheme 65

Scheme 66

Scheme 67

1. INSPECT STEREO COMPONENT AMPLIFIER Disconnect the stereo component amplifier connector. Measure the resistance according to the values in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition GND - Body ground Always Below 1 ohms GND2 - Body ground ( (1) ) Always Below 1 ohms E - Body ground ( (2) ) Always Below 1 ohms (1) Standard System (2) Mark Levinson System Measure the voltage according to the values in the table below. Standard voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition B+ - GND Always 10 to 14 V +B - GND Always 10 to 14 V +B2 - GND Always 10 to 14 V ACC - GND Ignition SW ACC 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This circuit provides power to the multi-display controller.

Scheme 68

Scheme 69

1. INSPECT MULTI-DISPLAY CONTROLLER Disconnect the multi-display controller R15 connector. Measure the resistance according to the value in the table below. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition GND - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition +B1 - GND Always 10 to 14 V ACC - GND Ignition SW ACC 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

DIAGNOSIS DISPLAY DETAILED DESCRIPTION

HINT

1. This information contains a detailed description of displays within diagnostic mode.
2. Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

1. System Check System Check Mode Display Device Names and hardware Address/*1 HINT: Registered device names are displayed below. If a device name is unknown to the system, its physical address is shown instead. PHYSICAL ADDRESS AND NAME REFERENCE Address No. Name Address No. Name 16C, 16D RSE 1B0 Rr-TV Check Result/*2 HINT: Result codes for all devices are shown below. RESULT CODES REFERENCE Result Meaning Action OK The device did not respond with a DTC (excluding communication DTCs from the AVC-LAN). - EXCH The device responds with a "replace"-type DTC. Look up the DTC in "Unit Check Mode" and replace the device. CHEK The device responds with a "check"-type DTC. Look up the DTC in "Unit Check Mode". NCON The device was previously present, but does not respond in diagnostic mode. Check power supply wire harness of the device. Check the sub AVC-LAN of the device. Old The device responds with an "old"-type DTC. Look up the DTC in "Unit Check Mode". NRES The device responds in diagnostic mode, but gives no DTC information. Check power supply wire harness of the device. Check the sub AVC-LAN of the device. Code Clear/*3 Present DTCs are cleared. Memory Clear/*4 Present and past DTCs and registered connected device names are cleared. Diagnosis MENU Display HINT: Each item is grayed out or not displayed based on the device settings. Unit Check Mode Screen Screen Description: SCREEN DESCRIPTION Display Contents Device name/*1 Target Device Segment/*2 Target Device Logical address DTC/*3 DTC (Diagnostic Trouble Code) Timestamp/*4 The time and date of past DTCs displayed. (The year is displayed in 2 digit format.) Present Code/*5 The DTC output at the service check is displayed. Past Code/*6 Diagnostic memory results and recorded DTCs are displayed. LAN Monitor (Original) Screen Check result HINT: Check results of all the devices are displayed. RESULT MEANING AND ACTION Result Meaning Action No Err (OK) There are no communication DTCs. - CHEK The device responds with a "check"-type DTC. Look up the DTC in "Unit Check Mode". NCON The device was previously present, but does not respond in diagnostic mode. Check power supply wire harness of the device. Check the sub AVC-LAN of the device. Old The device responded with an "old"-type DTC. Look up the DTC in "Unit Check Mode". NRES Device responds in diagnostic mode, but gives no DTC information. Check power supply wire harness of the device. Check the sub AVC-LAN of the device. LAN Monitor (Individual) Screen Screen Description: SCREEN DESCRIPTION Display Contents Device name/*1 Target device Segment/*2 Target logical address DTC/*3 DTC (Diagnostic Trouble Code) Sub-Code (device address)/*4 Physical address stored with DTC. (If there is no address, nothing is displayed.) Connection check No./*5 Connection check number stored with DTC. DTC occurrence/*6 Number of times the same DTC has been recorded.

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. REPLACE MULTI-DISPLAY CONTROLLER END

DTC DETECTION CONDITION AND TROUBLE AREA

Note. Be sure to clear and recheck DTCs and perform inspection according to the result to prevent the above "HINT". The multi-display controller is the master unit. Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.

Note. Be sure to read DESCRIPTION before performing the following procedures.

1. CHECK "MULTI-DISPLAY CONTROLLER COMMUNICATION ERROR" IN FLOW CHART Refer to the «MULTI-DISPLAY CONTROLLER COMMUNICATION ERROR»(ref-236035-S10570869872006062900000). END

DTC DETECTION CONDITION AND TROUBLE AREA

Note. Be sure to clear and recheck DTCs and perform inspection according to the result to avoid the conditions shown in the "HINT" above. The multi-display controller is the master unit. Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.

Note. Be sure to read DESCRIPTION before performing the following procedures.

Scheme 75

Scheme 76

Scheme 77

1. CHECK MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT Refer to the «MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT»(ref-236035-S32212501222006062900000). If the power source circuit is operating normally, proceed to the next step.
2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the "LAN Mon" switch to change to "LAN Monitor" mode. Identify the component which has stored this code. Component Table COMPONENT REFERENCE Display Component RSE Multi-display controller Rr-TV Rear Display assembly HINT: The "NAVI" is the component which has stored this code in the example shown in the illustration.
3. CHECK POWER SOURCE CIRCUIT OF THE COMPONENT WHICH HAS STORED THIS CODE Inspect the power source circuit of the component which has stored this code. If the power source circuit is operating normally, proceed to the next step. Component Table COMPONENT REFERENCE Component Proceed to Multi-display controller (RSE) «MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT»(ref-236035-S32212501222006062900000) Rear Display Assembly (Rr-TV) «REAR DISPLAY ASSEMBLY POWER SOURCE CIRCUIT»(ref-236035-S36554210802006062900000)
4. CHECK MULTI-DISPLAY CONTROLLER Disconnect the multi-display connectors. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition TX+ (R25-1) - TX- (R25-6) Always 60 to 80 ohms TX2+ (R17-5) - TX2 - (R17-4) Always 60 to 80 ohms TX3+ (R15-17) TX3- (R15-18) Always 60 to 80 ohms TX4+ (R16-14) TX4- (R16-13) Always 60 to 80 ohms NG: REPLACE MULTI-DISPLAY CONTROLLER OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROL - COMPONENT WHICH HAS STORED THIS CODE) Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display controller and the component which has stored this code. Check for an open or short in the AVC-LAN circuit between the multi-display controller and the component which has stored this code. OK: There is no open or short circuit. HINT: For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S17368704062006062900000) ". NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. REPLACE COMPONENT WHICH HAS STORED THIS CODE Replace the component which has stored this code with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE MULTI-DISPLAY CONTROLLER OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

Note. Be sure to clear and recheck DTCs and perform inspection according to the result to avoid the conditions shown in the HINT above. The multi-display controller is the master unit. Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.

Note. Be sure to read DESCRIPTION before performing the following procedures.

Scheme 78

1. CHECK FOR DTC OF OTHER COMPONENTS Check if the component shown by the sub-code is displayed in the check result of the other components. Check if "01-DC" is output for the other components. If "01-DC" is output for any other components, check if the same physical address is displayed. HINT: For the list of the components shown by sub-codes, refer to the table in step 2. Result 01-DC OUTPUT RESULT Result Proceed to "01-DC" is output and the same physical address is displayed A "01-DC" is not output or the same physical address is not displayed B B: Go to step 4 A: Go to next step
2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the "LAN Mon" switch to change to "LAN Monitor" mode. Identify the component which has stored this code. Component Table COMPONENT REFERENCE Display Component RSE (16C, 16D) Multi-display controller Rr-TV (1 B0) Rear display assembly HINT: The "NAVI" is the component which has stored this code in the example shown in the illustration.
3. CHECK COMPONENT WHICH HAS STORED THIS CODE Select the component which has stored this code. Inspect the component which has stored this code. Component Table COMPONENT REFERENCE Component Proceed to Multi-display controller (RSE) «MULTI-DISPLAY CONTROLLER COMMUNICATION ERROR»(ref-236035-S10570869872006062900000) Rear Display Assembly (Rr-TV) «REAR DISPLAY ASSEMBLY COMMUNICATION ERROR»(ref-236035-S22379719382006062900000) END
4. CLEAR DTC Clear the DTC (See «DTC CHECK/CLEAR»(ref-236035-S01594093612006062900000) ). HINT: If "01-DC" is output for only one component, this may not indicate a malfunction.
5. RECHECK DTC Recheck DTCs and check if the same trouble occurs again. OK: Malfunction disappears. NG: Go to step 3 OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

Note. Be sure to clear and recheck DTCs and perform inspection according to the result to avoid the conditions shown in the "HINT" above. The multi-display controller is the master unit. Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.

Note. Be sure to read DESCRIPTION before performing the following procedures.

Scheme 79

Scheme 80

Scheme 81

1. CHECK MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT Refer to the «MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT»(ref-236035-S32212501222006062900000). If the power source circuit is operating normally, proceed to the next step.
2. INSPECT MULTI-DISPLAY CONTROLLER Disconnect the multi-display connectors. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition TX+ (R25-1) - TX- (R25-6) Always 60 to 80 ohms TX2+ (R17-5) - TX2- (R17-4) Always 60 to 80 ohms TX3+ (R15-17) TX3- (R15-18) Always 60 to 80 ohms TX4+ (R16-14) TX4- (R16-13) Always 60 to 80 ohms NG: REPLACE MULTI-DISPLAY CONTROLLER OK: Go to next step
3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE Enter the diagnostic mode. Press the "LAN Mon" switch to change to "LAN Monitor" mode. Identify the component which has stored this code. Component Table COMPONENT REFERENCE Display Component Rr-TV Rear display assembly HINT: The "NAVI" is the component which has stored this code in the example shown in the illustration.
4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT WHICH HAS STORED THIS CODE) HINT: For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S17368704062006062900000) ". Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display controller and the component which has stored this code. Check for an open or short in the AVC-LAN circuit between the multi-display controller and the component which has stored this code. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. REPLACE MULTI-DISPLAY CONTROLLER Replace the multi-display controller with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

If no failure is detected, a trouble code may be recorded depending on the battery condition or engine start voltage.

HINT

After the inspection is completed, clear the DTCs.

This DTC is not related with the malfunction.

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. REPLACE MULTI-DISPLAY CONTROLLER END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. DISC CLEANING Disc cleaning If dirt is on the disc surface, wipe it with a soft cloth from inside to outside in a radial direction. NOTE: Do not use conventional record cleaner or antistatic preservative.
2. CHECK DISC Check that the disc is not deformed or cracked. OK: No deformation or cracks on the disc. NG: DISC IS FAULTY OK: Go to next step.
3. REPLACE DISC WITH ANOTHER AND RECHECK Replace the disc with another and recheck. Replace the disc with another normal one. Clear the DTCs. Recheck DTCs and check if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE REAR DISPLAY ASSEMBLY OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. CHECK REAR DISPLAY ASSEMBLY Check if a disc can be inserted or ejected normally. OK: A disc can be inserted or ejected normally. NG: REPLACE REAR DISPLAY ASSEMBLY OK: Go to next step.
2. DTC CLEAR AND RECHECK Clear the DTCs (See «DTC CHECK/CLEAR»(ref-236035-S16477215052006062900000) ). Recheck DTCs and check if the same trouble occurs again. OK: Same problem does not occur. OK: END NG: REPLACE REAR DISPLAY ASSEMBLY

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. REAR DISPLAY ASSEMBLY Check if a disc can be changed, inserted or ejected normally. OK: Malfunction disappears. NG: REPLACE REAR DISPLAY ASSEMBLY END OK: END

DTC DETECTION CONDITION AND TROUBLE AREA

HINT

After the inspection is completed, clear the DTCs.

1. CHECK THAT CD IS INSERTED PROPERLY Check whether or not the CD is inserted upside down. OK: CD is properly inserted. NG: SET CD PROPERLY OK: Go to next step.
2. DISC CLEANING Disc cleaning If dirt is on the disc surface, wipe it with a soft cloth from inside to outside in a radial direction. NOTE: Do not use conventional record cleaner or antistatic preservative.
3. CHECK DISC Check that the disc is not deformed or cracked. OK: No deformation or cracks on the disc. NG: DISC IS FAULTY OK: Go to next step.
4. REPLACE DISC WITH ANOTHER AND RECHECK Replace the disc with another and recheck. Replace the disc with another normal one. Clear the DTCs. Recheck DTCs and check if the same trouble occurs again. OK: Malfunction disappears. NG: REPLACE REAR DISPLAY ASSEMBLY OK: END

Scheme 82

1. CHECK BATTERY (REMOTE CONTROLLER) Check battery. Check that the dry-cell battery used for the remote controller is not dead. OK: It is not dead. NG: BATTERY IS DEAD OK: Go to next step.
2. CLEAN THE INFRARED RAY EMITTING PORTION Clean the infrared ray emitting portion. Clean the infrared ray emitting portion on the rear display assembly. Check whether the same malfunction occurs. OK: The function returns to normal. NG: RETURN TO THE ORIGINAL INSPECTION FLOW OK: NORMAL

This is the sound signal circuit from the radio receiver to the multi-display controller.

Scheme 83

Scheme 84

Scheme 85

1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER AND MULTI-DISPLAY CONTROLLER) Disconnect the connectors from the radio receiver assembly and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition RSLD - SG2 Always Below 1 ohms R-L- - R-L- Always Below 1 ohms R-L+ - R-L+ Always Below 1 ohms R-R- - R-R- Always Below 1 ohms R-R+ - R-R+ Always Below 1 ohms R-L- - Body ground Always 10 kohms or higher R-L+ - Body ground Always 10 kohms or higher R-R- - Body ground Always 10 kohms or higher R-R+ - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. INSPECT RADIO RECEIVER ASSEMBLY Reconnect the radio receiver assembly connector. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions, as shown in the chart below. Signal waveform WAVEFORM REFERENCE Tester Connection Condition Specified Condition R-L- - Body ground Voice sound is being produced A waveform synchronized with sound is output R-L+ - Body ground Voice sound is being produced A waveform synchronized with sound is output R-R- - Body ground Voice sound is being produced A waveform synchronized with sound is output R-R+ - Body ground Voice sound is being produced A waveform synchronized with sound is output NG: REPLACE RADIO RECEIVER ASSEMBLY OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This is the sound signal circuit from the video (video adapter) terminal to the multi-display controller.

Scheme 86

Scheme 87

Scheme 88

1. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROLLER AND VIDEO TERMINAL) Disconnect the connectors from the video (video adapter) terminal and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition SG - SG7 Always Below 1 ohms VAR+ - AUXR Always Below 1 ohms VAL+ - AUXL Always Below 1 ohms VAL+ - Body ground Always 10 kohms or higher VAR+ - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. INSPECT VIDEO (VIDEO ADAPTER) TERMINAL Reconnect the video (video adapter) terminal connector. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions, as shown in the chart below. HINT: An external device system is playing (When the video (video adapter) terminal is used). Signal waveform WAVEFORM REFERENCE Tester Connection Condition Specified Condition VAL+ - Body ground Voice sound is being produced A waveform synchronized with sound is output VAR+ - Body ground Voice sound is being produced A waveform synchronized with sound is output NG: REPLACE VIDEO (VIDEO ADAPTER) TERMINAL OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This is the sound signal circuit from the multi-display controller to the rear display assembly.

Scheme 89

Scheme 90

Scheme 91

1. CHECK HARNESS AND CONNECTOR (REAR DISPLAY ASSEMBLY AND MULTI-DISPLAY CONTROLLER) Disconnect the connectors from the rear display assembly and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition SLD - SG6 Always Below 1 ohms HP2L - HP2L Always Below 1 ohms HP2R - HP2R Always Below 1 ohms S. GND - SG5 Always Below 1 ohms HP1R - HP1R Always Below 1 ohms HP1L - HP1L Always Below 1 ohms HP2L - Body ground Always 10 kohms or higher HP2R - Body ground Always 10 kohms or higher HP1R - Body ground Always 10 kohms or higher HP1L - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. INSPECT MULTI-DISPLAY CONTROLLER Reconnect the multi-display controller connector. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions, as shown in the chart below. Signal waveform WAVEFORM REFERENCE Tester Connection Condition Specified Condition HP2L - Body ground Voice sound is being produced A waveform synchronized with sound is output HP2R - Body ground Voice sound is being produced A waveform synchronized with sound is output HP1R - Body ground Voice sound is being produced A waveform synchronized with sound is output HP1L - Body ground Voice sound is being produced A waveform synchronized with sound is output NG: REPLACE MULTI-DISPLAY CONTROLLER OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This is the sound signal circuit from the rear display assembly to the multi-display controller.

Scheme 92

Scheme 93

Scheme 94

1. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROLLER AND REAR DISPLAY ASSEMBLY) Disconnect the connectors from the multi-display controller and rear display assembly. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition SLD - SLD1 Always Below 1 ohms HPL- - HPL- Always Below 1 ohms HPL+ - HPL+ Always Below 1 ohms HPR- - HPR- Always Below 1 ohms HPR+ - HPR+ Always Below 1 ohms HPL- - Body ground Always 10 kohms or higher HPL+ - Body ground Always 10 kohms or higher HPR- - Body ground Always 10 kohms or higher HPR+ - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. INSPECT MULTI-DISPLAY CONTROLLER Reconnect the multi-display controller connector. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions, as shown in the chart below. Signal waveform WAVEFORM REFERENCE Tester Connection Condition Specified Condition HPL- - Body ground Voice sound is being produced A waveform synchronized with sound is output HPL+ - Body ground Voice sound is being produced A waveform synchronized with sound is output HPR- - Body ground Voice sound is being produced A waveform synchronized with sound is output HPR+ - Body ground Voice sound is being produced A waveform synchronized with sound is output NG: REPLACE MULTI-DISPLAY CONTROLLER OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This is the sound signal circuit from the rear display assembly to the multi-display controller.

Scheme 95

Scheme 96

Scheme 97

1. CHECK HARNESS AND CONNECTOR (REAR DISPLAY ASSEMBLY AND MULTI-DISPLAY CONTROLLER) Disconnect the connectors from the rear display assembly and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition SLD - SG4 Always Below 1 ohms L- - AL- Always Below 1 ohms R- - AR- Always Below 1 ohms L+ - AL+ Always Below 1 ohms R+ - AR+ Always Below 1 ohms AL- - Body ground Always 10 kohms or higher AR- - Body ground Always 10 kohms or higher AL+ - Body ground Always 10 kohms or higher AR+ - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. INSPECT REAR DISPLAY ASSEMBLY Reconnect the rear display assembly connector. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions, as shown in the chart below. Signal waveform WAVEFORM REFERENCE Tester Connection Condition Specified Condition L- - Body ground Voice sound is being produced A waveform synchronized with sound is output R- - Body ground Voice sound is being produced A waveform synchronized with sound is output L+ - Body ground Voice sound is being produced A waveform synchronized with sound is output R+ - Body ground Voice sound is being produced A waveform synchronized with sound is output NG: REPLACE REAR DISPLAY ASSEMBLY OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

The multi-display controller controls the volume according to the RMUT signal from the radio receiver. The RMUT signal is sent to reduce noise and a popping sound generated when switching the mode, etc.

Scheme 98

Scheme 99

Scheme 100

1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER AND MULTI-DISPLAY CONTROLLER) Disconnect the connectors from the radio receiver and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition RMUT - RMUT Always Below 1 ohms RMUT - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. INSPECT RADIO RECEIVER Reconnect the radio receiver connector. Measure the voltage according to the value(s) in the table below. Voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition RMUT - Body ground Audio system is playing 3.5 V RMUT - Body ground Audio system is changing Below 1.0 V NG: REPLACE RADIO RECEIVER OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

The multi-display controller controls the volume according to the MUTE signal from the rear display. The RMUT signal is sent to reduce noise and a popping sound generated when switching the mode, etc.

Scheme 101

Scheme 102

Scheme 103

1. CHECK HARNESS AND CONNECTOR (REAR DISPLAY ASSEMBLY AND MULTI-DISPLAY CONTROLLER) Disconnect the connectors from the rear display and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition MUTE - MUTE Always Below 1 ohms MUTE - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. INSPECT REAR DISPLAY ASSEMBLY Reconnect the rear display connector. Measure the voltage according to the value(s) in the table below. Voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition MUTE - Body ground DVD system is playing 3.5 V MUTE - Body ground DVD system is changing Below 1.0 V NG: REPLACE REAR DISPLAY ASSEMBLY OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

Each unit of the rear seat entertainment system connected to the AVC-LAN (communication bus) transfers the signal of each switch by communication.

When a short to +B or short to ground occurs in this AVC-LAN, the rear seat entertainment system will not function normally as the communication is discontinued.

Scheme 104

Scheme 105

1. SERVICE CHECK MODE (REAR DISPLAY ASSEMBLY) Perform the service check. Start the diagnosis system and read the check result for the rear display assembly. Result RESULT REFERENCE Proceed To Condition A "NCON" is displayed or result is not displayed (Rr-TV) B "OK" is displayed B: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE RESULT IS NORMAL A: Go to next step.
2. CHECK HARNESS AND CONNECTOR (REAR DISPLAY ASSEMBLY AND MULTI-DISPLAY CONTROLLER) Disconnect the connectors from the rear display assembly and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition TX+ - TX2+ Always Below 1 ohms TX- - TX2- Always Below 1 ohms TX+ - Body ground Always 10 kohms or higher TX- - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE RESULT IS NORMAL

Illustration "A" is the display signal circuit from the multi-display controller to the rear display assembly.

Illustration "B" is the display signal circuit from the rear display assembly to the multi-display controller.

Scheme 106

Note. Be sure to read DESCRIPTION and WIRING DIAGRAM before performing the following procedures.

Scheme 107

Scheme 108

1. CHECK HARNESS AND CONNECTOR (REAR DISPLAY ASSEMBLY AND MULTI-DISPLAY CONTROLLER) Inspect illustration "A". Disconnect the connectors from the rear display assembly and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition R - R2 Always Below 1 ohms G - G2 Always Below 1 ohms B - B2 Always Below 1 ohms SYNC - SYN2 Always Below 1 ohms VG - VG2 Always Below 1 ohms R - Body ground Always 10 kohms or higher G - Body ground Always 10 kohms or higher B - Body ground Always 10 kohms or higher SYNC - Body ground Always 10 kohms or higher VR - Body ground Always 10 kohms or higher Inspect illustration "B". Disconnect the connectors from the rear display assembly and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition S. GND - SGN2 Always Below 1 ohms NTSC - NTS2 Always Below 1 ohms LOCK - SG9 Always Below 1 ohms NTSC - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This is the display signal circuit from the video terminal to the multi-display controller.

Scheme 109

Scheme 110

1. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROLLER AND VIDEO TERMINAL) Disconnect the connectors from the video terminal and multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition ADPG - SG6 Always Below 1 ohms VV+ - NTS4 Always Below 1 ohms VV- -SGN5 Always Below 1 ohms VV+ - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

Scheme 111

Scheme 112

Scheme 113

1. IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE Enter the diagnostic mode. Press the "LAN Mon" switch to change to "LAN Monitor" mode. Identify the component shown by the sub-code. HINT: The "110 (multi-display)" is the component shown by the sub-code in the example shown in the illustration. The sub-code will be indicated by its physical address. For the component list, refer to " «DIAGNOSIS DISPLAY DETAILED DESCRIPTION»(ref-236035-S16464093012006062900000) ".
2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE Inspect the power source circuit of the component shown by the sub-code. If the power source circuit is operating normally, proceed to the next step. Component Table COMPONENT REFERENCE TABLE Component Proceed to Rear Display Assembly (1B0) «REAR DISPLAY ASSEMBLY POWER SOURCE CIRCUIT»(ref-236035-S36554210802006062900000)
3. INSPECT MULTI-DISPLAY CONTROLLER Disconnect the multi-display connectors. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition TX+ (R25-1) - TX- (R25-6) Always 60 to 80 ohms TX2+ (R17-5) - TX2- (R17-4) Always 60 to 80 ohms TX3+ (R15-17) TX3- (R15-18) Always 60 to 80 ohms TX4+ (R16-14) TX4- (R16-13) Always 60 to 80 ohms NG: REPLACE MULTI-DISPLAY CONTROLLER OK: Go to next step.
4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT SHOWN BY SUB-CODE) HINT: Start the check from the circuit that is near the component shown by the sub-code first. For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S17368704062006062900000) ". Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display and the component shown by the sub-code. Check for open or short in the AVC-LAN circuit between the multi-display and the component shown by the sub-code. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
5. REPLACE COMPONENT SHOWN BY SUB-CODE Replace the component shown by the sub-code with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE REAR DISPLAY ASSEMBLY OK: END

Scheme 114

Scheme 115

1. IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE Enter the diagnostic mode. Press the "LAN Mon" switch to change to "LAN Monitor" mode. Identify the component shown by the sub-code. HINT: The "110 (multi-display)" is the component shown by the sub-code in the example shown in the illustration. The sub-code will be indicated by its physical address. For the component list, refer to " «DIAGNOSIS DISPLAY DETAILED DESCRIPTION»(ref-236035-S16464093012006062900000) ".
2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE Inspect the power source circuit of the component shown by the sub-code. If the power source circuit is operating normally, proceed to the next step. Component Table COMPONENT REFERENCE TABLE Component Proceed to Multi-display Controller (16C, 16D) «MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT»(ref-236035-S34519777362006062900000)
3. INSPECT MULTI-DISPLAY CONTROLLER Disconnect the multi-display connectors. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition TX+ (R25-1) - TX- (R25-6) Always 60 to 80 ohms TX2+ (R17-5) - TX2- (R17-4) Always 60 to 80 ohms TX3+ (R15-17) TX3- (R15-18) Always 60 to 80 ohms TX4+ (R16-14) TX4- (R16-13) Always 60 to 80 ohms NG: REPLACE MULTI-DISPLAY CONTROLLER OK: Go to next step.
4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROLLER - COMPONENT SHOWN BY SUB-CODE) HINT: Start the check from the circuit that is near the component shown by the sub-code first. For details of the connectors, refer to the " «TERMINALS OF ECU»(ref-236035-S17368704062006062900000) ". Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display controller and the component shown by the sub-code. Check for open or short in the AVC-LAN circuit between the multi-display controller and the component shown by the sub-code. OK: There is no open or short circuit. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
5. REPLACE COMPONENT SHOWN BY SUB-CODE Replace the component shown by the sub-code with a normal one and check if the same problem occurs again. OK: Same problem does not occur. NG: REPLACE MULTI-DISPLAY CONTROLLER OK: END

This is the power source circuit to operate the multi-display controller.

Scheme 116

Scheme 117

1. INSPECT MULTI-DISPLAY CONTROLLER (+B1, ACC, GND, SELD, GAUX, NAVI) Disconnect the connector from the multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition GND - Body ground Always Below 1 ohms SELD - Body ground Always Below 1 ohms GAUX - Body ground Always Below 1 ohms NAVI - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition +B1 - GND Always 10 to 14 V ACC - GND Ignition SW ACC 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

This is the power source circuit to operate the rear display assembly. The power source is sent from the battery to the rear display assembly through the multi-display controller.

Scheme 118

Scheme 119

Scheme 120

1. INSPECT REAR DISPLAY ASSEMBLY (+B, ACC, GND) Disconnect the connector from the rear display assembly. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition GND - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition +B - GND Always 10 to 14 V ACC - GND Ignition SW ACC 10 to 14 V NG: Go to step 2 OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL
2. CHECK HARNESS AND CONNECTOR (REAR DISPLAY ASSEMBLY AND MULTI-DISPLAY CONTROLLER) Disconnect the connector from the multi-display controller. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition +B - +B2 Always Below 1 ohms ACC - ACC2 Always Below 1 ohms GND - GND1 Always Below 1 ohms GND - Body ground Always Below 1 ohms +B - Body ground Always 10 kohms or higher ACC - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL

Scheme 121

Scheme 122

Scheme 123

Scheme 124

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
3. REMOVE CONSOLE PANEL UPPER FRONT (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
4. REMOVE INSTRUMENT PANEL FINISH PANEL LOWER (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
5. REMOVE RADIO RECEIVER Remove the 4 bolts. Disengage the 2 claws and the 2 clips. Disconnect the connectors. Remove the radio receiver with bracket. Remove the 3 screws and the No.1 radio bracket. Remove the 3 screws and the No.2 radio bracket.

Scheme 125

Scheme 126

Scheme 127

1. INSTALL RADIO RECEIVER Install the No.2 radio bracket with the 3 bolts. Install the No. 1 radio bracket with the 3 bolts. Connect the connectors. Engage the 2 claws and the 2 clips. Install the radio receiver with bracket with the 4 bolts.
2. INSTALL INSTRUMENT PANEL FINISH PANEL LOWER (See «INSTALLATION»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
3. INSTALL CONSOLE PANEL UPPER FRONT (See «INSTALLATION»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
4. INSTALL SHIFT LEVER KNOB SUB-ASSEMBLY
5. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
6. PERFORM INITIALIZATION NOTE: Some systems need initialization when disconnecting the cable from negative battery terminal. (See «PRECAUTION»(ref-236035-S28418810512006062900000) )

Scheme 128

Scheme 129

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
3. REMOVE CONSOLE PANEL UPPER FRONT (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
4. REMOVE INSTRUMENT PANEL FINISH PANEL LOWER (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
5. REMOVE RADIO RECEIVER (See «REMOVAL»(ref-236035-S08012520682006062900000) )
6. REMOVE MULTI-DISPLAY Remove the 2 bolts and disengage the 4 clips. Disconnect the connectors. Remove the multi-display.

Scheme 130

1. INSTALL MULTI-DISPLAY Connect the connectors. Engage the 4 clips and install the multi-display with the 2 bolts.
2. INSTALL RADIO RECEIVER (See «INSTALLATION»(ref-236035-S41863565292006062900000) )
3. INSTALL INSTRUMENT PANEL FINISH PANEL LOWER (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
4. INSTALL CONSOLE PANEL UPPER FRONT (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/gauges-instrument-panels/#instrument-panel) )
5. INSTALL SHIFT LEVER KNOB SUB-ASSEMBLY
6. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
7. PERFORM INITIALIZATION NOTE: Some systems need initialization when disconnecting the cable from negative battery terminal. (See «PRECAUTION»(ref-236035-S28418810512006062900000) )

Scheme 131

Scheme 132

Scheme 133

Scheme 134

Scheme 135

Scheme 136

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. REMOVE TONNEAU COVER ASSEMBLY
3. REMOVE DECK BOARD SUB-ASSEMBLY (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/exteriorinterior-trim/#interior) )
4. REMOVE JACK CARRIER SUPPORT
5. REMOVE JACK ASSEMBLY
6. REMOVE JACK CARRIER ASSEMBLY
7. REMOVE DECK FLOOR BOX FRONT (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/exteriorinterior-trim/#interior) )
8. REMOVE DECK FLOOR BOX REAR (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/exteriorinterior-trim/#interior) )
9. REMOVE DECK NO. 2 BOARD SUB-ASSEMBLY (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/exteriorinterior-trim/#interior) )
10. REMOVE DECK NO. 3 BOARD SUB-ASSEMBLY (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/exteriorinterior-trim/#interior) )
11. REMOVE REAR FLOOR FINISH PLATE (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/exteriorinterior-trim/#interior) )
12. REMOVE DECK SIDE TRIM BOX LH (See «REMOVAL»(/lexus/rx/ii-facelift-2006-2009/remont/exteriorinterior-trim/#interior) )
13. REMOVE DECK SIDE TRIM BOX RH
14. REMOVE REAR SEAT SUB FLOOR PANEL ASSEMBLY Remove the 3 bolts, the 3 nuts and the rear seat sub floor panel assembly.
15. REMOVE STEREO COMPONENT AMPLIFIER (w/o Mark Levinson System) Remove the 2 bolts and the nut. Disconnect the 2 connectors. Remove the stereo component amplifier.
16. REMOVE STEREO COMPONENT AMPLIFIER (w/ Mark Levinson System) Remove the 2 bolts and the nut. Disconnect the 4 connectors. Remove the stereo component amplifier. Remove the 2 bolts and the No.1 amplifier bracket. Remove the 2 bolts and the No.2 amplifier bracket.

Scheme 137

Scheme 138

Scheme 139

Scheme 140

Scheme 141

1. INSTALL STEREO COMPONENT AMPLIFIER (w/ Mark Levinson System) Install the No.2 amplifier bracket with the 2 bolts. Install the No.3 amplifier bracket with the 3 bolts. Connect the 4 connectors. Install the stereo component amplifier with the 2 bolts and the nut.
2. INSTALL STEREO COMPONENT AMPLIFIER Connect the 2 connectors. Install the stereo component amplifier with the 2 bolts and the nut.
3. INSTALL REAR SEAT SUB FLOOR PANEL ASSEMBLY Install the rear seat sub floor panel assembly with the 3 bolts and the 3 nuts.
4. INSTALL DECK SIDE TRIM BOX RH
5. INSTALL DECK SIDE TRIM BOX LH
6. INSTALL REAR FLOOR FINISH PLATE
7. INSTALL DECK NO. 3 BOARD SUB-ASSEMBLY
8. INSTALL DECK NO. 2 BOARD SUB-ASSEMBLY
9. INSTALL DECK FLOOR BOX REAR
10. INSTALL DECK FLOOR BOX FRONT
11. INSTALL JACK CARRIER ASSEMBLY
12. INSTALL JACK ASSEMBLY
13. INSTALL JACK CARRIER SUPPORT
14. INSTALL DECK BOARD SUB-ASSEMBLY
15. INSTALL TONNEAU COVER ASSEMBLY
16. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
17. PERFORM INITIALIZATION NOTE: Some systems need initialization when disconnecting the cable from negative battery terminal. (See «PRECAUTION»(ref-236035-S28418810512006062900000) )

Scheme 142

See also:
• PRECAUTION
• REMOVAL
• REMOVAL