Entertainment System (Dianostics & Circuit Tests): Overview Lexus LX J200

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1. OUTLINE As a unique feature of the Rear Seat Entertainment (RSE) system, the rear seat occupants can enjoy different audio-visual modes at the same time. The rear seat occupants can control the audio-visual modes with the remote controller, and listen to audio by using wired or wireless headphones. HINT: *: If the vehicle has a navigation system, "multi-display" refers to the "display and navigation module display".
2. FUNCTION OF MAIN COMPONENT Component Function Television Display Displays DVD and video images in accordance with video signals from the multi-display selector. Receives signals from the remote controller and outputs them to the multi-display selector. Outputs audio signals to the wireless headphones in the form of infrared signals. Displays the audio-visual control screen. Displays the adjustment screen. Displays the diagnosis screen. The diagnosis screen appears when the diagnosis mode is started on the multi-display. Displays when open, but does not display when closed. Even if the engine switch is turned from on (ACC) to off to on (ACC), the display condition continues. Audio Head Unit: Radio Receiver Outputs audio signals to the multi-display selector and the stereo component amplifier. Outputs a request to the multi-display to start the diagnosis mode. Receives RSE sound signals from the multi-display selector and outputs them to the stereo component amplifier. Multi-display Selector (RSE ECU) Processes video and audio signals from the disc player and video player and audio signals from the audio head unit, and outputs them to the television display and headphone terminals. Controls the distribution of the audio-visual mode to the front (audio head unit) and the rear (RSE). Remote Controller Outputs various control signals of the RSE system to the television display in the form of infrared signals. Wireless Headphone Receives the audio signals from the television display in the form of infrared signals. Volume adjustment of the wireless headphone can be performed by using the volume adjuster on the wireless headphone. Headphone Terminal Outputs audio signals to the wired headphones that are connected. Adjusts the volume of the wired headphones in accordance with the volume control. VTR Terminal This terminal is for connecting the video player video and audio output terminals.
3. DIAGNOSIS FUNCTION When the radio receiver or navigation system changes to the diagnosis screen, the television display shows an RSE diagnosis screen.
4. DVD (Digital Versatile Disc) PLAYER OUTLINE (for TELEVISION DISPLAY) The DVD player can only play DVD videos that have one of the following marks: Precaution for use of discs NOTE: Keep the discs away from dirt. Be careful not to damage the discs or leave your fingerprints on them. Hold discs by the outer edge and center hole with the label side up. Leaving the disc exposed halfway out of the slot for a long time after pressing the disc eject button may cause deformation of the disc, making the disc unusable. Do not use uniquely-shaped CDs because these may cause player malfunctions. Do not use discs whose recording portion is transparent or translucent because they may not be able to be inserted, ejected, or played normally.

DESCRIPTION

This is the sound signal circuit from the multi-display selector to the headphone terminal.

HINT

"Multi-display Controller" refers to the multi-display selector.

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1. CHECK REMOTE CONTROL ADAPTER ASSEMBLY Disconnect the P1 adapter connector. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions shown in the chart below. OK Tester Connection Condition Specified Condition P1-1 (HP2R) - Body ground Audio sound is being produced A waveform synchronized with sound is output P1-2 (HP2L) - Body ground P1-9 (HP1R) - Body ground P1-10 (HP1L) - Body ground NG --> See step 2 OK --> See step 3
2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY SELECTOR - REMOTE CONTROL ADAPTER) Disconnect the L22 selector connector. Disconnect the P1 adapter connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L22-16 (HP2R) - P1-1 (HP2R) Always Below 1 ohms L22-17 (HP2L) - P1-2 (HP2L) L22-18 (SG2) - P1-3 (SGN2) L22-13 (HP1R) - P1-9 (HP1R) L22-14 (HP1L) - P1-10 (HP1L) L22-15 (SG1) - P1-11 (SGN1) P1-1 (HP2R) - Body ground Always 10 kohms or higher P1-2 (HP2L) - Body ground P1-9 (HP1R) - Body ground P1-10 (HP1L) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
3. REPLACE REMOTE CONTROL ADAPTER ASSEMBLY. Refer to «REMOVAL»
4. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»

This is the sound signal circuit from the multi-display selector to the television display.

HINT

"Multi-display Controller" refers to the multi-display selector.

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1. CHECK TELEVISION DISPLAY ASSEMBLY Disconnect the L26 display connector. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions shown in the chart below. OK Tester Connection Condition Specified Condition L26-5 (L1+) - Body ground Audio sound is being produced A waveform synchronized with sound is output L26-6 (L1-) - Body ground Audio sound is being produced A waveform synchronized with sound is output L26-3 (R1+) - Body ground Audio sound is being produced A waveform synchronized with sound is output L26-4 (R1-) - Body ground Audio sound is being produced A waveform synchronized with sound is output NG --> See step 2 OK --> See step 3
2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY SELECTOR - TELEVISION DISPLAY ASSEMBLY) Disconnect the L24 selector connector. Disconnect the L26 display connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L24-3 (L1+) - L26-5 (L1+) Always Below 1 ohms L24-2 (L1-) - L26-6 (L1-) L24-5 (R1+) - L26-3 (R1+) L24-4 (R1-) - L26-4 (R1-) L24-3 (L1+) - Body ground Always 10 kohms or higher L24-2 (L1-) - Body ground L24-5 (R1+) - Body ground L24-4 (R1-) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
3. REPLACE TELEVISION DISPLAY ASSEMBLY. Refer to «REMOVAL»
4. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»

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

HINT

"Multi-display Controller" refers to the multi-display selector.

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1. CHECK MULTI-DISPLAY SELECTOR Disconnect the L23 selector connector. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions shown in the chart below. OK Tester Connection Condition Specified Condition L23-20 (L4-) - Body ground Audio sound is being produced A waveform synchronized with sound is output L23-21 (L4+) - Body ground Audio sound is being produced A waveform synchronized with sound is output L23-22 (R4-) - Body ground Audio sound is being produced A waveform synchronized with sound is output L23-23 (R4+) - Body ground Audio sound is being produced A waveform synchronized with sound is output NG --> See step 2 OK --> See step 7
2. CHECK VEHICLE EQUIPMENT Check if the SDARS system is equipped on the vehicle. RESULT Result Proceed to w/o SDARS System A w/ SDARS System B B --> See step 4 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY SELECTOR) Disconnect the F23 receiver connector. Disconnect the L23 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F23-15 (R-R+) - L23-23 (R4+) Always Below 1 ohms F23-16 (R-R-) - L23-22 (R4-) F23-17 (R-L+) - L23-21 (L4+) F23-18 (R-L-) - L23-20 (L4-) L23-23 (R4+) - Body ground Always 10 kohms or higher L23-22 (R4-) - Body ground L23-21 (L4+) - Body ground L23-20 (L4-) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT TUNER) Disconnect the F23 receiver connector. Disconnect the L39 tuner connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F23-15 (R-R+) - L39-17 (RRI+) Always Below 1 ohms F23-16 (R-R-) - L39-18 (RRI-) F23-17 (R-L+) - L39-19 (RLI+) F23-18 (R-L-) - L39-20 (RLI-) F23-15 (R-R+) - Body ground Always 10 kohms or higher F23-16 (R-R-) - Body ground F23-17 (R-L+) - Body ground F23-18 (R-L-) - Body ground F23-14 (RSLD) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER - MULTI-DISPLAY SELECTOR) Disconnect the L39 tuner connector. Disconnect the L23 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L39-2 (RLO-) - L23-20 (L4-) Always Below 1 ohms L39-3 (RLO+) - L23-21 (L4+) L39-4 (RRO-) - L23-22 (R4-) L39-5 (RRO+) - L23-23 (R4+) L23-20 (L4-) - Body ground Always 10 kohms or higher L23-21 (L4+) - Body ground L23-22 (R4-) - Body ground L23-23 (R4+) - Body ground L39-1 (SLD3) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. REPLACE STEREO COMPONENT TUNER WITH NORMAL ONE AND CHECK Replace the stereo component tuner with a normal one and check if the same problem occurs again. Refer to «REMOVAL». OK Same problem does not occur. NG --> See step 9 OK --> END (STEREO COMPONENT TUNER IS DEFECTIVE)
7. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»
8. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»
9. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»

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

HINT

"Multi-display Controller" refers to the multi-display selector.

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1. CHECK MULTI-DISPLAY SELECTOR Disconnect the L25 selector connector. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions shown in the chart below. OK Tester Connection Condition Specified Condition L25-9 (TVL+) - Body ground Audio sound is being produced A waveform synchronized with sound is output L25-7 (TVR+) - Body ground NG --> See step 2 OK --> See step 3
2. CHECK HARNESS AND CONNECTOR (REMOTE CONTROL ADAPTER - MULTI-DISPLAY SELECTOR) Disconnect the P1 adapter connector. Disconnect the L25 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P1-5 (VAR+) - L25-7 (TVR+) Always Below 1 ohms P1-6 (VAL+) - L25-9 (TVL+) P1-7 (VA-) - L25-11 (SLDE) P1-8 (ADPG) - L25-6 (ADPI) L25-7 (TVR+) - Body ground Always 10 kohms or higher L25-9 (TVL+) - Body ground L25-11 (SLDE) - Body ground L25-6 (APDI) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
3. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»
4. REPLACE REMOTE CONTROL ADAPTER ASSEMBLY. Refer to «REMOVAL»

The multi-display selector controls the volume according to the mute signal from the radio receiver.

The mute signal is sent to reduce noise and a popping sound generated when switching the mode, etc.

HINT

"Multi-display Controller" refers to the multi-display selector.

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1. CHECK MULTI-DISPLAY SELECTOR Disconnect the L23 selector connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition L23-19 (MUT4) - Body ground Engine switch on (ACC), RSE system playing --> changing modes 3.5 V or higher --> Below 1 V NG --> See step 2 OK --> See step 7
2. CHECK VEHICLE EQUIPMENT Check if the SDARS system is equipped on the vehicle. RESULT Result Proceed to w/o SDARS System A w/ SDARS System B B --> See step 4 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY SELECTOR) Disconnect the F23 receiver connector. Disconnect the L23 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F23-19 (RMUT) - L23-19 (MUT4) Always Below 1 ohms L23-19 (MUT4) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT TUNER) Disconnect the F23 receiver connector. Disconnect the L39 tuner connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F23-19 (RMUT) - L39-14 (MUT3) Always Below 1 ohms F23-19 (RMUT) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER - MULTI-DISPLAY SELECTOR) Disconnect the L39 tuner connector. Disconnect the L23 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L39-13 (MUT4) - L23-19 (MUT4) Always Below 1 ohms L23-19 (MUT4) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. REPLACE STEREO COMPONENT TUNER WITH NORMAL ONE AND CHECK Replace the stereo component tuner with a normal one and check if the same problem occurs again. Refer to «REMOVAL». OK Same problem does not occur. NG --> See step 9 OK --> END (STEREO COMPONENT TUNER IS DEFECTIVE)
7. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»
8. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»
9. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»

This is the display signal circuit from the multi-display to the television display.

HINT

If the vehicle has a navigation system, "multi-display" refers to the "display and navigation module display".

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This is the display signal circuit from the multi-display selector to the television display.

HINT

"Multi-display Controller" refers to the multi-display selector.

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1. CHECK TELEVISION DISPLAY ASSEMBLY Disconnect the L26 display connector. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions shown in the chart below. MEASUREMENT CONDITION Item Content Terminal No. (Symbol) L26-9 (NTSC) - Body ground Tool Setting 200 mV/DIV., 10 μsec./DIV. Condition DVD displayed on television display OK Waveform is as shown in the illustration. NG --> See step 2 OK --> See step 3
2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY SELECTOR - TELEVISION DISPLAY ASSEMBLY) Disconnect the L22 selector connector. Disconnect the L26 display connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L22-5 (NTS3) - L26-9 (NTSC) Always Below 1 ohms L22-4 (SGN3) - L26-10 (SGN1) L22-19 (SLDC) - L26-8 (SLD) L22-5 (NTS3) - Body ground Always 10 kohms or higher L22-4 (SGN3) - Body ground L22-19 (SLDC) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
3. REPLACE TELEVISION DISPLAY ASSEMBLY. Refer to «REMOVAL»
4. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»

This is the display signal circuit from the video terminal to the television display.

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1. CHECK TELEVISION DISPLAY ASSEMBLY Disconnect the L26 display connector. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions shown in the chart below. MEASUREMENT CONDITION Item Content Terminal No. (Symbol) L26-9 (NTSC) - Body ground Tool Setting 200 mV/DIV., 10 μsec./DIV. Condition DVD displayed on television display OK Waveform is as shown in the illustration. NG --> See step 2 OK --> See step 5
2. CHECK HARNESS AND CONNECTOR (REMOTE CONTROL ADAPTER - MULTI-DISPLAY SELECTOR) Disconnect the P1 adapter connector. Disconnect the L25 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P1-13 (VV+) - L25-3 (NTS4) Always Below 1 ohms P1-14 (VV-) - L25-4 (SGN4) P1-8 (ADPG) - L25-6 (ADPI) P1-15 (SG) - L25-5 (SLDD) L25-3 (NTS4) - Body ground Always 10 kohms or higher L25-4 (SGN4) - Body ground L25-6 (ADPI) - Body ground L25-5 (SLDD) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY SELECTOR - TELEVISION DISPLAY ASSEMBLY) Disconnect the L22 selector connector. Disconnect the L26 display connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L22-5 (NTS3) - L26-9 (NTSC) Always Below 1 ohms L22-4 (SGN3) - L26-10 (SGN1) L22-19 (SLDC) - L26-8 (SLD) L22-5 (NTS3) - Body ground Always 10 kohms or higher L22-4 (SGN3) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. REPLACE REMOTE CONTROL ADAPTER WITH NORMAL ONE AND CHECK Replace the remote control adapter. Refer to «REMOVAL» with a normal one and check if the same problem occurs again. OK Same problem does not occur. NG --> See step 6 OK --> END (HEADPHONE TERMINAL IS DEFECTIVE)
5. REPLACE TELEVISION DISPLAY ASSEMBLY. Refer to «REMOVAL»
6. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»

This is the display signal circuit from the radio receiver to the television display.

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1. CHECK TELEVISION DISPLAY ASSEMBLY Disconnect the L26 display connector. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions shown in the chart below. MEASUREMENT CONDITION Item Content Terminal No. (Symbol) L26-9 (NTSC) - Body ground Tool Setting 200 mV/DIV., 10 μsec./DIV. Condition DVD displayed on television display OK Waveform is as shown in the illustration. NG --> See step 2 OK --> See step 5
2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY SELECTOR) Disconnect the F25 receiver connector. Disconnect the L22 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F25-5 (NTRO) - L22-24 (NTS2) Always Below 1 ohms F25-6 (SGD4) - L22-25 (SGN2) F25-7 (SLD2) - L22-26 (SLDB) L22-24 (NTS2) - Body ground Always 10 kohms or higher L22-25 (SGN2) - Body ground L22-26 (SLDB) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY SELECTOR - TELEVISION DISPLAY ASSEMBLY) Disconnect the L22 selector connector. Disconnect the L26 display connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L22-5 (NTS3) - L26-9 (NTSC) Always Below 1 ohms L22-4 (SGN3) - L26-10 (SGN1) L22-19 (SLDC) - L26-8 (SLD) L22-5 (NTS3) - Body ground Always 10 kohms or higher L22-4 (SGN3) - Body ground L22-19 (SLDC) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. REPLACE MULTI-DISPLAY SELECTOR WITH NORMAL ONE AND CHECK Replace the multi-display selector with a normal one and check if the same problem occurs again. Refer to «REMOVAL». OK Same problem does not occur. NG --> See step 6 OK --> END (MULTI-DISPLAY SELECTOR IS DEFECTIVE)
5. REPLACE TELEVISION DISPLAY ASSEMBLY. Refer to «REMOVAL»
6. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»

This circuit provides power to the multi-display selector.

HINT

"Multi-display Controller" refers to the multi-display selector.

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1. INSPECT FUSE (RSE, ACC) Disconnect the RSE fuse from the engine room relay block. Disconnect the ACC fuse from the main body ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition RSE fuse Always Below 1 ohms ACC fuse NG --> REPLACE FUSE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY SELECTOR - BATTERY AND BODY GROUND) Disconnect the L22 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L22-12 (GND) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition L22-1 (+B) - Body ground Always 11 to 14 V L22-6 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
3. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»

This circuit provides power to the television display. The power is sent from the battery to the television display through the multi-display selector.

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1. CHECK TELEVISION DISPLAY ASSEMBLY Disconnect the L26 display connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L26-16 (GND) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition L26-14 (+B) - Body ground Always 11 to 14 V L26-29 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V NG --> See step 2 OK --> See step 4
2. CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY ASSEMBLY - MULTI-DISPLAY SELECTOR) Disconnect the L26 display connector. Disconnect the L22 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L26-14 (+B) - L22-2 (+B1) Always Below 1 ohms L26-29 (ACC) - L22-7 (ACC1) L26-16 (GND) - L22-11 (GND1) L26-14 (+B) - Body ground Always 10 kohms or higher L26-29 (ACC) - Body ground L26-16 (GND) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
3. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»
4. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»

See also:
• REMOVAL
• REMOVAL