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Audio / Video (Diagnostic Codes & Circuit Tests): Overview Lexus LX J200

Entertainment Systems 80 illustrations ~8871 words

DESCRIPTION

DTC CodeDTC Detection ConditionTrouble Area
01-21A malfunction exists in the ROM.Display and navigation module display*1 Multi-display assembly*2
01-22A malfunction exists in the RAM.
  1. *1: w/ Navigation System
  2. *2: w/o Navigation System
DTC CodeDTC Detection ConditionTrouble Area
01-D5*1, *3When either condition below is met: The component shown by the sub-code is (was) disconnected from the system when turning the engine switch on (ACC) or on (IG). The communication condition with the device that the code shows cannot be obtained when the engine starts.Power source circuit of component shown by sub-code AVC-LAN circuit between multi-display and component shown by sub-code Component shown by sub-code
01-D8*2, *3The component shown by the sub-code is (was) disconnected from the system after the engine starts.
01-D9*1, *3The device that had functioned before the engine stopped is (was) disconnected from the system when the engine switch is (was) on (ACC) or on (IG).
01-DA*3When either condition below is met: No response is identified when changing modes. Sound and image do not change by switch operation.
01-DB*1, *3Dual alarm is detected.
01-DE*3The slave device has been disconnected after the engine starts.

HINT

*1: Even if no fault is present, this trouble code may be stored depending on the battery condition or engine start voltage.

*2: If the power connector is disconnected after the engine starts, this code is stored after 180 seconds.

*3: If it is reported that the device does not exist during verification, check the power source circuit and AVC-LAN circuit for the device.

Note. Before starting troubleshooting, be sure to clear DTCs to clear codes stored due to the reasons described in the Hint above. Then, check for DTCs and troubleshoot according to the output DTCs. The multi-display or display and navigation module display is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

DTC CodeDTC Detection ConditionTrouble Area
01-D6*1When either of the following conditions is met: The component which has stored the code has (had) been disconnected when the engine switch is on (ACC) or on (IG). The master device has (had) been disconnected when this code is stored.Display and navigation assembly power source circuit (w/ Navigation System) Multi-display power source circuit (w/o Navigation System) Power source circuit of component which has stored this code AVC-LAN circuit between the multi-display and the component which has stored this code Component which has stored this code Display and navigation module display (w/ Navigation System) Multi-display assembly ( w/o Navigation System)
01-D7*2When either of the following conditions is met: The component which has stored the code has (had) been disconnected after the engine starts (started). The master device has (had) been disconnected when this code is (was) stored.

HINT

*1: Even if no fault is present, this trouble code may be stored depending on the battery condition or engine start voltage.

*2: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the engine switch on (ACC) or on (IG), this code is stored.

Note. Before starting troubleshooting, be sure to clear DTCs to clear codes stored due to the reasons described in the Hint above. Then, check for DTCs and troubleshoot according to the output DTCs. The multi-display or display and navigation module display is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

Scheme 192

Scheme 192: WIRING DIAGRAM
Scheme 192: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
01-DCTransmission to the component shown by the sub-code failed (the storing of this DTC does not always mean actual failure).If same sub-code is stored in other components, check harness of power supply and communication system of all components shown by code

Note. The multi-display or display and navigation module display is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

DTC CodeDTC Detection ConditionTrouble Area
01-DDThe device that should be the master has been disconnected after the engine starts.Display and Navigation assembly power source circuit (w/ Navigation System) Multi-display power source circuit (w/o Navigation System) AVC-LAN circuit between multi-display and component which has stored this code Display and navigation module display (w/ Navigation System) Multi-display assembly (w/o Navigation System) Component which has stored this code
01-E1*1The amplifier device records that the amplifier output does not function even while the source device is operating.

HINT

*: Even if no fault is present, this trouble code may be stored depending on the battery condition or engine start voltage.

Note. Before starting troubleshooting, be sure to clear DTCs to clear codes stored due to the reasons described in the Hint above. Then, check for DTCs and troubleshoot according to the output DTCs. The multi-display or display and navigation module display is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

DTC CodeDTC Detection ConditionTrouble Area
01-DF*When either condition below is met: The device with a display fails and the master is switched to the audio device. A communication error between the sub-master (radio receiver) and master occurs.Display and navigation assembly power source circuit (w/ Navigation System) Multi-display power source circuit (w/o Navigation System) AVC-LAN circuit between multi-display and component which has stored this code AVC-LAN circuit between multi-display and radio receiver Display and navigation module display (w/ Navigation System) Multi-display assembly (w/o Navigation System) Component which has stored this code

HINT

*: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the engine switch on (ACC) or on (IG), this code is stored.

Note. Before starting troubleshooting, be sure to clear DTCs to clear codes stored due to the reasons described in the Hint above. Then, check for DTCs and troubleshoot according to the output DTCs. The multi-display or display and navigation module display is the master unit. Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

DTC CodeDTC Detection ConditionTrouble Area
01-E0A "Registration complete" signal from the master device cannot be received.
01-E3A registration demand signal from the slave device is output, or a registration demand signal is output by receiving a connection confirmation signal from the sub-master device.
01-E4Multiple frame transmission is incomplete.

HINT

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

DTC CodeDTC Detection ConditionTrouble Area
01-E2A signal for ON/OFF control from the master device has a problem.Display and navigation module display*1 Multi-display assembly*2
  1. *1: w/ Navigation System
  2. *2: w/o Navigation System
DTC CodeDTC Detection ConditionTrouble Area
21-10The panel switch detection circuit has a problem.Display and navigation module display*1 Multi-display assembly*2
21-11The touch panel switch has a problem.
23-10The panel switch detection circuit has a problem.
23-11The touch panel switch has a problem.
24-10The panel switch detection circuit has a problem.
24-11The touch panel switch has a problem.
25-10The panel switch detection circuit has a problem.
25-11The touch panel switch has a problem.
  1. *1: w/ Navigation System
  2. *2: w/o Navigation System
DTC CodeDTC Detection ConditionTrouble Area
34-10An error in the power supply system for the picture circuit.Display and navigation module display*1 Multi-display assembly*2
34-11A decline in power output from the inverter circuit for the back-light.
34-12Excess power output from the inverter circuit for the back-light.
  1. *1: w/ Navigation System
  2. *2: w/o Navigation System
DTC CodeDTC Detection ConditionTrouble Area
45-10A mechanical error in the DVD changer is detected while a disc is not being inserted or ejected.Radio receiver assembly
45-11Disc insertion or ejection fails.
45-12A disc read problem occurs.
DTC CodeDTC Detection ConditionTrouble Area
45-41An unsuitable disc is inserted.Disc Radio receiver assembly
45-42The disc cannot be read.
DTC CodeDTC Detection ConditionTrouble Area
45-43Disc operation is abnormal.Disc Radio receiver assembly
DTC CodeDTC Detection ConditionTrouble Area
45-44An operation error in the DVD mechanism.Radio receiver assembly
45-48Excess current is present in the DVD changer.
45-50A malfunction in the insertion/ejection system.
DTC CodeDTC Detection ConditionTrouble Area
45-45The disc cannot be the ejected.Radio receiver assembly
45-51A mechanical error occurs during the elevator operation.
45-52An error occurs in the DVD changer clamp.
DTC CodeDTC Detection ConditionTrouble Area
45-46Scratches or dirt is found on the disc surface or the disc is inserted upside down.Disc Radio receiver assembly
DTC CodeDTC Detection ConditionTrouble Area
45-47The sensor detects that the DVD unit temperature is high (higher than 80°C (176°F)).Radio receiver assembly
DTC CodeDTC Detection ConditionTrouble Area
45-78An error occurs during the decode process (MP3/WMA).Radio receiver assembly
DTC CodeDTC Detection ConditionTrouble Area
45-7DWhen either condition below is met: An incompatible MP3 or WMA file is used. Although the file has an extension of ".mp3" or ".wma", the header information cannot be read.Disc Radio receiver assembly
45-7EWhen either condition below is met: A disc with no music data is used. Playable files are not on the disc (MP3 or WMA).
45-7FA copy-protected file which cannot be played is used.
DTC CodeDTC Detection ConditionTrouble Area
57-47When one of the following conditions is met: The "Bluetooth" module is not installed. A problem with the "Bluetooth" module. A problem in the communication line to the "Bluetooth" module.Display and navigation module display*1 Multi-display assembly*2
  1. *1: w/ Navigation System
  2. *2: w/o Navigation System

HINT

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

DTC CodeDTC Detection ConditionTrouble Area
5C-40A synchronous signal from the camera cannot be transmitted.Harness or connector Rear television camera Multi-display assembly

Scheme 193

Scheme 193: WIRING DIAGRAM
Scheme 193: WIRING DIAGRAM
DTC CodeDTC Detection ConditionTrouble Area
60-10AM tuner PLL (phase locked loop) synchronization is impossible.Radio receiver assembly
60-11FM tuner PLL (phase locked loop) synchronization is impossible.
DTC CodeDTC Detection ConditionTrouble Area
60-42The power source of the tuner is abnormal.Radio receiver assembly
60-43The AM tuner is abnormal.
60-44The FM tuner is abnormal.
60-50A problem occurs in the internal IC of the tuner unit and the radio reception is not normal.
DTC CodeDTC Detection ConditionTrouble Area
63-10A mechanical error in the CD changer is detected while a CD is not being inserted or ejected.Radio receiver assembly
63-11CD insertion or ejection fails.
63-12A CD read problem occurs.
DTC CodeDTC Detection ConditionTrouble Area
63-41An unsuitable disc is inserted.Disc Radio receiver assembly
63-42The disc cannot be read.
DTC CodeDTC Detection ConditionTrouble Area
63-43CD operation is abnormal.CD Radio receiver assembly
DTC CodeDTC Detection ConditionTrouble Area
63-44An operation error in the CD mechanism.Radio receiver assembly
63-48Excess current is present in the CD changer.
63-50A malfunction in the insertion/ejection system.
DTC CodeDTC Detection ConditionTrouble Area
63-45The magazine cannot be ejected.Radio receiver assembly
63-51A mechanical error occurs during the elevator operation.
63-52An error occurs in the CD changer clamp.
DTC CodeDTC Detection ConditionTrouble Area
63-46Scratches or dirt is found on the CD surface or the CD is inserted upside down.CD Radio receiver assembly
DTC CodeDTC Detection ConditionTrouble Area
63-47The sensor detects that the CD unit temperature is high (higher than 80°C (176°F)).Radio receiver assembly
DTC CodeDTC Detection ConditionTrouble Area
63-78An error occurs during the decode process (MP3/WMA).Radio receive assembly
DTC CodeDTC Detection ConditionTrouble Area
63-7DWhen either condition below is met: An incompatible MP3 or WMA file is used. Although the file has the extension of ".mp3" or ".wma", the header information cannot be read.Disc Radio receiver assembly
63-7EWhen either condition below is met: A disc with no music data is used. Playable files are not on the disc (MP3 or WMA).
63-7FA copy-protected file which cannot be played is used.
DTC CodeDTC Detection ConditionTrouble Area
74-40A short is detected in the speaker output circuit.Harness or connector Speaker Stereo component amplifier assembly

Scheme 194

Scheme 194: WIRING DIAGRAM
Scheme 194: WIRING DIAGRAM

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Scheme 196

This is the power source circuit to operate the stereo component tuner.

HINT

  1. "Satellite Radio Tuner" refers to the stereo component tuner.
  2. Only vehicles with a navigation system have this circuit.

Scheme 197

Scheme 197: WIRING DIAGRAM
Scheme 197: WIRING DIAGRAM

Scheme 198

Scheme 198: PROCEDURE
Scheme 198: PROCEDURE
  1. INSPECT FUSE (ACC, RAD NO. 1) Remove the ACC fuse from the main body ECU. Remove the RAD NO. 1 fuse from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ACC fuse Always Below 1 ohms RAD NO. 1 fuse Always Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER - BATTERY AND BODY GROUND) Disconnect the L37 tuner connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L37-7 (GND) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition L37-12 (+B) - L37-7 (GND) Always 11 to 14 V L37-11 (ACC) - L37-7 (GND) 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»

Scheme 199

Scheme 199: WIRING DIAGRAM
Scheme 199: WIRING DIAGRAM

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

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

If there is a short in the circuit, the resulting condition is the same as if the switch were continuously depressed. Therefore, the navigation system cannot be operated using the steering pad switch, and the navigation system itself cannot function.

Scheme 200

Scheme 200: WIRING DIAGRAM
Scheme 200: WIRING DIAGRAM

HINT

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

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

Scheme 201

Scheme 201: WIRING DIAGRAM
Scheme 201: WIRING DIAGRAM

Scheme 202

Scheme 202
Scheme 202

This circuit is from the parking brake switch to the multi-display.

HINT

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

Scheme 203

Scheme 203: WIRING DIAGRAM
Scheme 203: WIRING DIAGRAM

Scheme 204

Scheme 204: PROCEDURE
Scheme 204: PROCEDURE

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Scheme 206
  1. CHECK PARKING BRAKE (DISPLAY CHECK MODE) Enter the "Display Check" mode and select "Vehicle Signal Check Mode". Refer to «OPERATION CHECK». Check that the display changes between ON and OFF according to the parking brake operation. OK Parking Brake Position Display Applied ON Released OFF HINT: This display is updated once per second. As a result, it is normal for the display to lag behind the actual change in the switch. NG --> See step 2 OK --> See step 5
  2. CHECK MAIN BODY ECU (PARKING BRAKE SIGNAL) Disconnect the F28 display connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F28-23 (PKB) - Body ground Engine switch on (IG), parking brake applied 11 to 14 V F28-23 (PKB) - Body ground Engine switch on (IG), parking brake released Below 1 V RESULT Result Proceed to OK (w/ Navigation System) A OK (w/o Navigation System) B NG C C --> See step 3 B --> See step 8 A --> See step 6
  3. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - MAIN BODY ECU) Disconnect the F28 display connector. Disconnect the 2E ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F28-23 (PKB) - 2E-2 (PKB) Always Below 1 ohms F28-23 (PKB) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. REPLACE MAIN BODY ECU Temporarily replace the ECU with a new or normally functioning one. Check that the parking brake signal is displayed on the multi-display. OK Parking brake signal is displayed on the multi-display. RESULT Result Proceed to OK A NG (w/ Navigation System) B NG (w/o Navigation System) C C --> See step 8 B --> See step 7 A --> END (MAIN BODY ECU IS DEFECTIVE)
  5. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»
  6. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to «REMOVAL»(/lexus/lx/j200-2007-2012/remont/navigation-system/#navigation-service-information)
  7. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to «REMOVAL»(/lexus/lx/j200-2007-2012/remont/navigation-system/#navigation-service-information)
  8. REPLACE MULTI-DISPLAY ASSEMBLY. Refer to «REMOVAL»(/lexus/lx/j200-2007-2012/remont/entertainment-systems/#audio-video-multi-display-service-information)

The stereo component amplifier sends sound signals to the speakers.

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Scheme 207: PROCEDURE
Scheme 207: PROCEDURE

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  1. CHECK AUDIO MODELS Check the audio model. RESULT Result Proceed to DVD changer models A CD changer models B B --> See step 25 A: Go to next step
  2. CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Malfunction in front speaker area A Malfunction in rear speaker area B B --> See step 15 A: Go to next step
  3. CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Front No. 4 speaker A Front No. 2 speaker B Front No. 1 speaker C Front No. 3 speaker D D --> See step 13 C --> See step 11 B --> See step 6 A: Go to next step
  4. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY Disconnect the F6 speaker connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 6.0 +/-1.0 ohms NG --> See step 39 OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 4 SPEAKER) Disconnect the F6 speaker connector. Disconnect the F3 amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F3-3 (CTR+) - F6-1 Always Below 1 ohms F3-9 (CTR-) - F6-2 Always Below 1 ohms F3-3 (CTR+) - Body ground Always 10 kohms or higher F3-9 (CTR-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 40
  6. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY Disconnect the F8 and F7 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always Below 1 ohms 3 - 4 Always Below 1 ohms 2 - 4 Always 6.0 +/-1.0 ohms NG --> See step 41 OK: Go to next step
  7. CHECK DEFECTIVE SPEAKER AND VEHICLE EQUIPMENT Check which side of the vehicle the defective speaker is on. Also, check if the vehicle is equipped with the LEXUS Link System. RESULT Result Proceed to Defective speaker is on right side (w/ LEXUS Link System) A Defective speaker is on right side (w/o LEXUS Link System) B Defective speaker is on left side B B --> See step 10 A: Go to next step
  8. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU - STEREO COMPONENT AMPLIFIER AND FRONT NO. 2 SPEAKER) Disconnect the F31 amplifier connector. Disconnect the F7 speaker connector. Disconnect the P2 ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F7-1 (+) - P2-2 (SPO+) Always Below 1 ohms F7-3 (-) - P2-3 (SPO-) F31-8 (FR+) - P2-10 (SPI+) F31-7 (FR-) - P2-11 (SPI-) F7-1 (+) - Body ground Always 10 kohms or higher F7-3 (-) - Body ground F31-8 (FR+) - Body ground F31-7 (FR-) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  9. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY (OPERATION) Replace the stereo component amplifier with a normal one and check that audio can be heard from the front RH side speaker. Refer to «REMOVAL». OK Audio can be heard. NG --> See step 42 OK --> END (STEREO COMPONENT AMPLIFIER IS DEFECTIVE)
  10. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER) Disconnect the F31 amplifier connector. Disconnect the F8 and F7 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance for LH for RH Tester Connection Condition Specified Condition F31-2 (FL+) - F8-1 (+) Always Below 1 ohms F31-6 (FL-) - F8-3 (-) Always Below 1 ohms F31-2 (FL+) - Body ground Always 10 kohms or higher F31-6 (FL-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition F31-8 (FR+) - F7-1 (+) Always Below 1 ohms F31-7 (FR-) - F7-3 (-) Always Below 1 ohms F31-8 (FR+) - Body ground Always 10 kohms or higher F31-7 (FR-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 43
  11. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY Disconnect the I10 and I1 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 1.9 +/-0.4 ohms NG --> See step 44 OK: Go to next step
  12. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 1 SPEAKER) Disconnect the I10 and I1 speaker connectors. Disconnect the F4 amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance for LH for RH Tester Connection Condition Specified Condition F4-10 (WFL+) - I10-1 Always Below 1 ohms F4-8 (WFL-) - I10-2 Always Below 1 ohms F4-10 (WFL+) - Body ground Always 10 kohms or higher F4-8 (WFL-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition F4-5 (WFR+) - I1-1 Always Below 1 ohms F4-11 (WFR-) - I1-2 Always Below 1 ohms F4-5 (WFR+) - Body ground Always 10 kohms or higher F4-11 (WFR-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 45
  13. CHECK FRONT NO. 3 SPEAKER ASSEMBLY Disconnect the F14 and F13 speaker connectors. Interchange the front No. 3 speaker LH with RH. Check that the malfunction disappears. OK Malfunction disappears. HINT: Connect all the connectors to the front No. 3 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. Perform the inspection above on both the LH and RH sides. NG --> See step 14 OK --> See step 46
  14. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY Disconnect the F8 and F7 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 - 4 Always 6.0 +/-1.0 ohms NG --> See step 47 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT NO. 2 SPEAKER - FRONT NO. 3 SPEAKER)
  15. CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Rear No. 2 speaker A Rear No. 3 speaker B Rear speaker set C No. 1 woofer box speaker D Rear header speaker E E --> See step 23 D --> See step 21 C --> See step 19 B --> See step 17 A: Go to next step
  16. INSPECT REAR NO. 2 SPEAKER ASSEMBLY Disconnect the rear No. 2 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 6.0 +/-1.0 ohms NG --> See step 48 OK --> See step 49
  17. CHECK REAR NO. 3 SPEAKER ASSEMBLY Disconnect the rear No. 3 speaker connectors. Interchange the rear No. 3 speaker LH with RH. Check that the malfunction disappears. OK Malfunction disappears. HINT: Connect all the connectors to the rear No. 3 speakers. When there is a possibility that either the right or left rear speaker is defective, inspect by interchanging the right one with the left one. Perform the inspection above on both the LH and RH sides. NG --> See step 18 OK --> See step 50
  18. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR NO. 3 SPEAKER) Disconnect the F31 amplifier connector. Disconnect the J8 and J1 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance for LH for RH Tester Connection Condition Specified Condition F31-3 (R-L+) - J8-1 (+) Always Below 1 ohms F31-9 (R-L-) - J8-2 (-) Always Below 1 ohms F31-3 (R-L+) - Body ground Always 10 kohms or higher F31-9 (R-L-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition F31-4 (R-R+) - J1-1 (+) Always Below 1 ohms F31-10 (R-R-) - J1-2 (-) Always Below 1 ohms F31-4 (R-R+) - Body ground Always 10 kohms or higher F31-10 (R-R-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 51
  19. INSPECT REAR SPEAKER SET Disconnect the J17 and J15 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 6.0 +/-1.2 ohms NG --> See step 52 OK: Go to next step
  20. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR SPEAKER SET) Disconnect the F3 and F31 amplifier connectors. Disconnect the J17 and J15 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance for LH for RH Tester Connection Condition Specified Condition F3-4 (RL+) - J17-1 Always Below 1 ohms F3-10 (RL-) - J17-2 F3-4 (RL+) - Body ground Always 10 kohms or higher F3-10 (RL-) - Body ground Tester Connection Condition Specified Condition F31-1 (RR+) - J15-1 Always Below 1 ohms F31-5 (RR-) - J15-2 F31-1 (RR+) - Body ground Always 10 kohms or higher F31-5 (RR-) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 53
  21. INSPECT NO. 1 WOOFER BOX SPEAKER ASSEMBLY Disconnect the L4 speaker connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 8.0 ohms NG --> See step 54 OK: Go to next step
  22. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - NO. 1 WOOFER BOX SPEAKER) Disconnect the F3 amplifier connector. Disconnect the L4 speaker connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F3-1 (WF1+) - L4-1 (WF1+) Always Below 1 ohms F3-6 (WF1-) - L4-2 (WF1-) Always Below 1 ohms F3-1 (WF1+) - Body ground Always 10 kohms or higher F3-6 (WF1-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 55
  23. INSPECT REAR HEADER SPEAKER ASSEMBLY Disconnect the S9 and S8 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 6.0 +/-1.0 ohms NG --> See step 56 OK: Go to next step
  24. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR HEADER SPEAKER) Disconnect the F4 amplifier connector. Disconnect the S9 and S8 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance for LH for RH Tester Connection Condition Specified Condition F4-2 (SL+) - S9-1 (RLD+) Always Below 1 ohms F4-7 (SL-) - S9-2 (RLD-) Always Below 1 ohms F4-2 (SL+) - Body ground Always 10 kohms or higher F4-7 (SL-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition F4-1 (SR+) - S8-1 (RRD+) Always Below 1 ohms F4-6 (SR-) - S8-2 (RRD-) Always Below 1 ohms F4-1 (SR+) - Body ground Always 10 kohms or higher F4-6 (SR-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 57
  25. CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Front No. 4 speaker A Front No. 2 speaker B Front No. 1 speaker C Front No. 3 speaker D Rear speaker set E E --> See step 37 D --> See step 35 C --> See step 33 B --> See step 28 A: Go to next step
  26. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY Disconnect the F6 speaker connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 6 ohms NG --> See step 58 OK: Go to next step
  27. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 4 SPEAKER) Disconnect the F6 speaker connector. Disconnect the F3 amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F3-3 (CTR+) - F6-1 Always Below 1 ohms F3-9 (CTR-) - F6-2 Always Below 1 ohms F3-3 (CTR+) - Body ground Always 10 kohms or higher F3-9 (CTR-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 59
  28. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY Disconnect the F8 and F7 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always Below 1 ohms 3 - 4 Always Below 1 ohms 2 - 4 Always 4 ohms NG --> See step 60 OK: Go to next step
  29. CHECK DEFECTIVE SPEAKER AND VEHICLE EQUIPMENT Check which side of the vehicle the defective speaker is on. Also, check if the vehicle is equipped with the LEXUS Link System. RESULT Result Proceed to Defective speaker is on right side (w/ LEXUS Link System) A Defective speaker is on right side (w/o LEXUS Link System) B Defective speaker is on left side B B --> See step 32 A: Go to next step
  30. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU - STEREO COMPONENT AMPLIFIER AND FRONT NO. 2 SPEAKER) Disconnect the F31 amplifier connector. Disconnect the F7 speaker connector. Disconnect the P2 ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F7-1 (+) - P2-2 (SPO+) Always Below 1 ohms F7-3 (-) - P2-3 (SPO-) F31-8 (FR+) - P2-10 (SPI+) F31-7 (FR-) - P2-11 (SPI-) F7-1 (+) - Body ground Always 10 kohms or higher F7-3 (-) - Body ground F31-8 (FR+) - Body ground F31-7 (FR-) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  31. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY Replace the stereo component amplifier with a normal one and check that audio can be heard from the front RH side speaker. Refer to «REMOVAL». OK Audio can be heard. NG --> See step 61 OK --> END (STEREO COMPONENT AMPLIFIER IS DEFECTIVE)
  32. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER) Disconnect the F31 amplifier connector. Disconnect the F8 and F7 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance for LH for RH Tester Connection Condition Specified Condition F31-2 (FL+) - F8-1 (+) Always Below 1 ohms F31-6 (FL-) - F8-3 (-) Always Below 1 ohms F31-2 (FL+) - Body ground Always 10 kohms or higher F31-6 (FL-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition F31-8 (FR+) - F7-1 (+) Always Below 1 ohms F31-7 (FR-) - F7-3 (-) Always Below 1 ohms F31-8 (FR+) - Body ground Always 10 kohms or higher F31-7 (FR-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 62
  33. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY Disconnect the I10 and I1 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 3 ohms NG --> See step 63 OK: Go to next step
  34. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 1 SPEAKER) Disconnect the I10 and I1 speaker connectors. Disconnect the F31 and F3 amplifier connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance for LH for RH Tester Connection Condition Specified Condition F3-4 (WFL+) - I10-1 Always Below 1 ohms F3-10 (WFL-) - I10-2 Always Below 1 ohms F3-4 (WFL+) - Body ground Always 10 kohms or higher F3-10 (WFL-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition F31-1 (WFR+) - I1-1 Always Below 1 ohms F31-5 (WFR-) - I1-2 Always Below 1 ohms F31-1 (WFR+) - Body ground Always 10 kohms or higher F31-5 (WFR-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 64
  35. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY Disconnect the F14 and F13 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 4 ohms NG --> See step 65 OK: Go to next step
  36. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY Disconnect the F8 and F7 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always Below 1 ohms 3 - 4 Always Below 1 ohms 2 - 4 Always 4 ohms NG --> See step 66 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT NO. 2 SPEAKER - FRONT NO. 3 SPEAKER)
  37. INSPECT REAR SPEAKER SET Disconnect the J17 and J15 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Always 4 ohms NG --> See step 67 OK: Go to next step
  38. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR SPEAKER SET) Disconnect the F31 amplifier connector. Disconnect the J17 and J15 speaker connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance for LH for RH Tester Connection Condition Specified Condition F31-3 (RL+) - J17-1 (+) Always Below 1 ohms F31-9 (RL-) - J17-2 (-) Always Below 1 ohms F31-3 (RL+) - Body ground Always 10 kohms or higher F31-9 (RL-) - Body ground Always 10 kohms or higher Tester Connection Condition Specified Condition F31-4 (RR+) - J15-1 (+) Always Below 1 ohms F31-10 (RR-) - J15-2 (-) Always Below 1 ohms F31-4 (RR+) - Body ground Always 10 kohms or higher F31-10 (RR-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 68
  39. REPLACE FRONT NO. 4 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  40. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  41. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  42. REPLACE TELEPHONE ECU ASSEMBLY. Refer to «REMOVAL»
  43. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  44. REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  45. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  46. REPLACE FRONT NO. 3 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  47. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  48. REPLACE REAR NO. 2 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  49. REPLACE REAR NO. 3 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  50. REPLACE REAR NO. 3 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  51. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  52. REPLACE REAR SPEAKER SET. Refer to «REMOVAL»
  53. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  54. REPLACE NO. 1 WOOFER BOX SPEAKER ASSEMBLY. Refer to «REMOVAL»
  55. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  56. REPLACE REAR HEADER SPEAKER ASSEMBLY. Refer to «REMOVAL»
  57. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  58. REPLACE FRONT NO. 4 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  59. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  60. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  61. REPLACE TELEPHONE ECU ASSEMBLY. Refer to «REMOVAL»
  62. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  63. REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  64. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»
  65. REPLACE FRONT NO. 3 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  66. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY. Refer to «REMOVAL»
  67. REPLACE REAR SPEAKER SET. Refer to «REMOVAL»
  68. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to «REMOVAL»

This circuit sends a sound signal from the radio receiver to the stereo component amplifier.

Scheme 224

Scheme 224: WIRING DIAGRAM
Scheme 224: WIRING DIAGRAM

Scheme 225

Scheme 225: PROCEDURE
Scheme 225: PROCEDURE
  1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) Disconnect the F1 receiver connector. Disconnect the F18 amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F1-9 (L+) - F18-3 (L+) Always Below 1 ohms F1-19 (L-) - F18-2 (L-) F1-8 (R+) - F18-5 (R+) F1-18 (R-) - F18-4 (R-) F1-9 (L+) - Body ground Always 10 kohms or higher F1-19 (L-) - Body ground F1-8 (R+) - Body ground F1-18 (R-) - Body ground F1-10 (SLD) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 2
  2. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»

This is the sound signal circuit from the display and navigation module display to the multi-display selector.

HINT

  1. Only vehicles with a navigation system have this circuit.
  2. "Multi-display Controller" refers to the multi-display selector.

Scheme 226

Scheme 226: WIRING DIAGRAM
Scheme 226: WIRING DIAGRAM

Scheme 227

Scheme 227: PROCEDURE
Scheme 227: PROCEDURE

Scheme 228

Scheme 228
Scheme 228
  1. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - MULTI-DISPLAY SELECTOR) Disconnect the F34 navigation 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 F34-3 (FL+) - L23-3 (L5+) Always Below 1 ohms F34-4 (FL-) - L23-4 (L5-) F34-1 (FR+) - L23-1 (R5+) F34-2 (FR-) - L23-2 (R5-) F34-3 (FL+) - Body ground Always 10 kohms or higher F34-4 (FL-) - Body ground F34-1 (FR+) - Body ground F34-2 (FR-) - Body ground F34-5 (SLD1) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY Reconnect the F34 navigation connector. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions shown in the chart below. Signal Waveform Tester Connection Condition Specified Condition L23-3 (L5+) - Body ground Audio sound is being produced A waveform synchronized with sound is output L23-4 (L5-) - Body ground L23-1 (R5+) - Body ground L23-2 (R5-) - Body ground NG --> See step 4 OK --> See step 3
  3. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»
  4. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to «REMOVAL»(/lexus/lx/j200-2007-2012/remont/navigation-system/#navigation-service-information)

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.

Scheme 229

Scheme 229: WIRING DIAGRAM
Scheme 229: WIRING DIAGRAM

Scheme 230

Scheme 230
Scheme 230

Scheme 231

Scheme 231: PROCEDURE
Scheme 231: PROCEDURE

Scheme 232

Scheme 232
Scheme 232

Scheme 233

Scheme 233
Scheme 233
  1. INSPECT RADIO RECEIVER Disconnect the L23 selector connector. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions shown in the chart below. OK Tester Connection Condition Specified Condition L23-13 (L6-) - Body ground Audio sound is being produced A waveform synchronized with sound is output L23-14 (L6+) - Body ground L23-15 (R6-) - Body ground L23-16 (R6+) - Body ground NG --> See step 2 OK --> See step 6
  2. CHECK VEHICLE EQUIPMENT Check if the SDARS system is equipped on the vehicle. RESULT Result Proceed to w/ SDARS System A w/o SDARS System B B --> See step 5 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT TUNER AND MULTI-DISPLAY SELECTOR) Disconnect the F24 receiver connector. Disconnect the L37 and L39 tuner connectors. Disconnect the L23 selector connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F24-2 (CDR+) - L37-2 (FRO+) Always Below 1 ohms F24-3 (CDR-) - L37-3 (FRO-) F24-4 (CDL+) - L37-4 (FLO+) F24-5 (CDL-) - L37-5 (FLO-) L39-10 (FRI+) - L23-16 (R6+) L39-9 (FRI-) - L23-15 (R6-) L39-8 (FLI+) - L23-14 (L6+) L39-7 (FLI-) - L23-13 (L6-) L37-1 (SLD) - Body ground Always 10 kohms or higher L37-2 (FRO+) - Body ground L37-3 (FRO-) - Body ground L37-4 (FLO+) - Body ground L37-5 (FLO-) - Body ground L23-16 (R6+) - Body ground L23-15 (R6-) - Body ground L23-14 (L6+) - Body ground L23-13 (L6-) - Body ground L23-17 (SLD6) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK STEREO COMPONENT TUNER (OPERATION) 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 7 OK --> END (STEREO COMPONENT TUNER IS DEFECTIVE)
  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY SELECTOR) Disconnect the F24 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 F24-2 (CDR+) - L23-16 (R6+) Always Below 1 ohms F24-3 (CDR-) - L23-15 (R6-) F24-4 (CDL+) - L23-14 (L6+) F24-5 (CDL-) - L23-13 (L6-) L23-13 (L6-) - Body ground Always 10 kohms or higher L23-14 (L6+) - Body ground L23-15 (R6-) - Body ground L23-16 (R6+) - Body ground L23-17 (SLD6) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
  6. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»
  7. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»
  8. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»

The stereo jack adapter sends an external device 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, radio receiver, or speakers.

Scheme 234

Scheme 234: WIRING DIAGRAM
Scheme 234: WIRING DIAGRAM

Scheme 235

Scheme 235
Scheme 235

Scheme 236

Scheme 236: PROCEDURE
Scheme 236: PROCEDURE

Scheme 237

Scheme 237
Scheme 237
  1. CHECK AUDIO MODELS Check the audio model. RESULT Result Proceed to for DVD Changer Models A for CD Changer Models B B --> See step 3 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO JACK ADAPTER) Disconnect the F26 receiver connector. Disconnect the V2 adapter connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition V2-4 (AUXO) - F26-6 (AUXI) Always Below 1 ohms V2-3 (ASGN) - F26-5 (ASGN) V2-2 (ARO) - F26-2 (ARI) V2-1 (ALO) - F26-3 (ALI) V2-5 (AGND) - F26-4 (AGND) V2-4 (AUXO) - Body ground Always 10 kohms or higher V2-3 (ASGN) - Body ground V2-2 (ARO) - Body ground V2-1 (ALO) - Body ground V2-5 (AGND) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
  3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO JACK ADAPTER) Disconnect the F23 receiver connector. Disconnect the V2 adapter connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F23-17 (ALI) - V2-1 (ALO) Always Below 1 ohms F23-15 (ARI) - V2-2 (ARO) F23-16 (ASGN) - V2-3 (ASGN) F23-19 (AUXI) - V2-4 (AUXO) F23-18 (AGND) - V2-5 (AGND) F23-17 (ALI) - Body ground Always 10 kohms or higher F23-15 (ARI) - Body ground F23-16 (ASGN) - Body ground F23-19 (AUXI) - Body ground F23-18 (AGND) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
  4. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»

The multi-display selector controls the volume according to the mute signal from the display and navigation module display.

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

HINT

  1. Only vehicles with a navigation system have this circuit.
  2. "Multi-display Controller" refers to the multi-display selector.

Scheme 238

Scheme 238: WIRING DIAGRAM
Scheme 238: WIRING DIAGRAM

Scheme 239

Scheme 239: PROCEDURE
Scheme 239: PROCEDURE

Scheme 240

Scheme 240
Scheme 240
  1. CHECK MULTI-DISPLAY SELECTOR Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition L23-6 (MUT5) - Body ground Engine switch on (ACC), audio system is playing --> changing modes 3.5 V or higher --> Below 1 V NG --> See step 2 OK --> See step 3
  2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - MULTI-DISPLAY SELECTOR) Disconnect the F34 navigation module display 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 F34-8 (MUTE) - L23-6 (MUT5) Always Below 1 ohms F34-8 (MUTE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
  3. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»
  4. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to «REMOVAL»(/lexus/lx/j200-2007-2012/remont/navigation-system/#navigation-service-information)

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

Scheme 241

Scheme 241: WIRING DIAGRAM
Scheme 241: WIRING DIAGRAM

Scheme 242

Scheme 242: PROCEDURE
Scheme 242: PROCEDURE
  1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) Disconnect the F1 receiver connector. Disconnect the F18 amplifier connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F1-7 (MUTE) - F18-1 (MUTE) Always Below 1 ohms F1-7 (MUTE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY (OPERATION) Replace the stereo component amplifier with a normal one and check if it operates normally. Refer to «REMOVAL». OK The audio system operates normally. NG --> See step 3 OK --> END (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE)
  3. REPLACE RADIO RECEIVER 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.

Scheme 243

Scheme 243: WIRING DIAGRAM
Scheme 243: WIRING DIAGRAM

Scheme 244

Scheme 244: PROCEDURE
Scheme 244: PROCEDURE

Scheme 245

Scheme 245
Scheme 245

Scheme 246

Scheme 246
Scheme 246

Scheme 247

Scheme 247
Scheme 247

Scheme 248

Scheme 248
Scheme 248
  1. CHECK MULTI-DISPLAY SELECTOR Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition L23-18 (MUT6) - Body ground Engine switch on (ACC), audio system is playing --> changing modes 3.5 V or higher --> Below 1 V NG --> See step 2 OK --> See step 8
  2. CHECK VEHICLE EQUIPMENT Check if the SDARS system is equipped on the vehicle. RESULT Result Proceed to w/ SDARS System A w/o SDARS System B B --> See step 6 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT TUNER) Disconnect the F24 receiver connector. Disconnect the L37 tuner connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F24-6 (MUTE) - L37-6 (MUTE) Always Below 1 ohms F24-6 (MUTE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. 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 L39-15 (MUT2) - L23-18 (MUT6) Always Below 1 ohms L23-18 (MUT6) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. CHECK STEREO COMPONENT TUNER (OPERATION) 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 7 OK --> END (STEREO COMPONENT TUNER IS DEFECTIVE)
  6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY SELECTOR) Disconnect the F24 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 F24-6 (MUTE) - L23-18 (MUT6) Always Below 1 ohms F24-6 (MUTE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  7. CHECK MULTI-DISPLAY SELECTOR Reconnect the L23 selector connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition L23-18 (MUT6) - Body ground Engine switch on (ACC), audio system is playing --> changing modes 3.5 V or higher --> Below 1 V NG --> See step 9 OK --> See step 10
  8. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»
  9. REPLACE MULTI-DISPLAY SELECTOR. Refer to «REMOVAL»
  10. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»

Each unit of the navigation system connected to the AVC-LAN (communication bus) communicates by transferring the signals from each switch.

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

The stereo component amplifier performs switch operation control during driving by receiving a vehicle speed signal from the combination meter.

Scheme 249

Scheme 249: WIRING DIAGRAM
Scheme 249: WIRING DIAGRAM

Scheme 250

Scheme 250: PROCEDURE
Scheme 250: PROCEDURE
  1. CHECK OPERATION OF SPEEDOMETER Drive the vehicle and check if the function of the speedometer in 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 --> See step 4 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - COMBINATION METER) Disconnect the F18 amplifier connector. Disconnect the E77 meter connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F18-11 (SPD) - E77-6 (+S) Always Below 1 ohms F18-11 (SPD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
  3. PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»
  4. GO TO METER/GAUGE SYSTEM. Refer to «Speedometer Malfunction»

This circuit sends a DVD image signal from the radio receiver to the multi-display.

HINT

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

Scheme 251

Scheme 251: WIRING DIAGRAM
Scheme 251: WIRING DIAGRAM

Scheme 252

Scheme 252: PROCEDURE
Scheme 252: PROCEDURE

Scheme 253

Scheme 253
Scheme 253
  1. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - RADIO RECEIVER) Disconnect the F29 display connector. Disconnect the F25 receiver connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F29-4 (VV-) - F25-2 (GND) Always Below 1 ohms F29-1 (VV+) - F25-1 (NTSC) Always Below 1 ohms F29-4 (VV-) - Body ground Always 10 kohms or higher F29-1 (VV+) - Body ground Always 10 kohms or higher F25-3 (SLD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. INSPECT RADIO RECEIVER (NTSC SIGNAL) Reconnect the F25 receiver connector. Check the waveform of the radio receiver using an oscilloscope. MEASUREMENT CONDITION Item Content Terminal No. (Symbol) NTSC (F25-1) - Body ground Tool Setting 0.2 V/DIV., 10 μsec./DIV. Condition DVD played on radio receiver OK Waveform is as shown in the illustration. NG --> See step 3 OK --> See step 4
  3. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»
  4. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»

w/o LEXUS Link System

This circuit sends a microphone signal from the microphone to the multi-display. It also supplies power from the multi-display to the microphone.

w/ LEXUS Link System

This circuit sends a microphone signal from the microphone to the display and module display through the telephone ECU assembly. It also supplies power from the telephone ECU assembly to the microphone.

Scheme 254

Scheme 254: WIRING DIAGRAM
Scheme 254: WIRING DIAGRAM

Scheme 255

Scheme 255
Scheme 255

Scheme 256

Scheme 256: PROCEDURE
Scheme 256: PROCEDURE

Scheme 257

Scheme 257
Scheme 257

Scheme 258

Scheme 258
Scheme 258

Scheme 259

Scheme 259
Scheme 259

Scheme 260

Scheme 260
Scheme 260

Scheme 261

Scheme 261
Scheme 261
  1. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY OR MULTI-DISPLAY Check the waveform of the microphone using an oscilloscope. STANDARD Tester Connection Condition Specified Condition F27-11 (MIN+) - F27-10 (MIN-) Engine switch on (ACC) and "Voice" switch of steering pad switch pressed Waveform that matches sound spoken into microphone is output. RESULT Result Proceed to OK (w/ Navigation System) A OK (w/o Navigation System) B NG C C --> See step 2 B --> See step 16 A --> See step 9
  2. CHECK LEXUS LINK SYSTEM Check if the vehicle is equipped with the LEXUS link system. RESULT Result Proceed to w/o LEXUS Link System A w/ LEXUS Link System B B --> See step 6 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (OVERHEAD JUNCTION BLOCK - MULTI-DISPLAY) Disconnect the R7 overhead junction block connector. Disconnect the F27 display connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F27-9 (MACC) - R7-22 (ACC) Always Below 1 ohms F27-11 (MIN+) - R7-21 (MI1+) Always Below 1 ohms F27-10 (MIN-) - R7-20 (MIC-) Always Below 1 ohms F27-9 (MACC) - Body ground Always 10 kohms or higher F27-11 (MIN+) - Body ground Always 10 kohms or higher F27-10 (MIN-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK MULTI-DISPLAY (MACC VOLTAGE) Reconnect the F27 display connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition F27-9 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V RESULT Result Proceed to OK A NG (w/ Navigation System) B NG (w/o Navigation System) C C --> See step 16 B --> See step 10 A: Go to next step
  5. CHECK MICROPHONE ASSEMBLY Remove the microphone from the overhead junction block. Refer to «REMOVAL». Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (MIC+) - 3 (MIC-) Always 1.9 to 2.2 kohms NG --> See step 11 OK --> See step 12
  6. CHECK HARNESS AND CONNECTOR (TELEPHONE ECU - MULTI-DISPLAY AND OVERHEAD JUNCTION BLOCK) Disconnect the P2 ECU connector. Disconnect the F27 display connector. Disconnect the R7 junction block connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P2-17 (MCO+) - F27-11 (MIN+) Always Below 1 ohms P2-18 (MCO-) - F27-10 (MIN-) Always Below 1 ohms P2-7 (MCVD) - R7-22 (ACC) Always Below 1 ohms P2-8 (MC1+) - R7-21 (MI1+) Always Below 1 ohms P2-9 (MC1-) - R7-20 (MIC-) Always Below 1 ohms P2-17 (MCO+) - Body ground Always 10 kohms or higher P2-18 (MCO-) - Body ground Always 10 kohms or higher P2-19 (SGND) - Body ground Always 10 kohms or higher P2-7 (MCVD) - Body ground Always 10 kohms or higher P2-8 (MC1+) - Body ground Always 10 kohms or higher P2-9 (MC1-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  7. CHECK TELEPHONE ECU ASSEMBLY (TACC VOLTAGE) Reconnect the P2 ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition P2-7 (MCVD) - Body ground Engine switch on (ACC) 4 to 6 V NG --> See step 13 OK: Go to next step
  8. CHECK MICROPHONE ASSEMBLY Remove the microphone from the overhead junction block. Refer to «REMOVAL». Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (MIC+) - 3 (MIC-) Always 1.9 to 2.2 kohms NG --> See step 14 OK --> See step 15
  9. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to «REMOVAL»(/lexus/lx/j200-2007-2012/remont/navigation-system/#navigation-service-information)
  10. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to «REMOVAL»(/lexus/lx/j200-2007-2012/remont/navigation-system/#navigation-service-information)
  11. REPLACE MICROPHONE ASSEMBLY. Refer to «REMOVAL»
  12. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»
  13. REPLACE TELEPHONE ECU ASSEMBLY. Refer to «REMOVAL»
  14. REPLACE MICROPHONE ASSEMBLY. Refer to «REMOVAL»
  15. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»
  16. REPLACE MULTI-DISPLAY ASSEMBLY. Refer to «REMOVAL»(/lexus/lx/j200-2007-2012/remont/entertainment-systems/#audio-video-multi-display-service-information)

HINT

Only vehicles without a navigation system have this circuit.

Scheme 262

Scheme 262: WIRING DIAGRAM
Scheme 262: WIRING DIAGRAM

Scheme 263

Scheme 263: PROCEDURE
Scheme 263: PROCEDURE

Scheme 264

Scheme 264
Scheme 264
  1. IDENTIFY COMPONENT SHOWN BY 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: "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 in the System Description. Refer to «SYSTEM DESCRIPTION». NEXT: Go to next step
  2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE Inspect the power source circuit of the component shown by the sub-code. COMPONENT TABLE Display Proceed to Radio receiver (190) Radio receiver power source circuit. Refer to «Radio Receiver Power Source Circuit» Stereo component amplifier (440) Stereo component amplifier power source circuit. Refer to «Stereo Component Amplifier Power Source Circuit» Television display (1F6)*1 Television display power source circuit. Refer to «Television Display Power Source Circuit» Parking assist ECU (1AC)*2 Parking assist ECU power source circuit. Refer to «ECU Power Source Circuit» Stereo component tuner (1F1)*3 Satellite radio tuner power source circuit. Refer to «Satellite Radio Tuner Power Source Circuit» If the power source circuit is operating normally, proceed to the next step. *1: w/ Rear Seat Entertainment System *2: w/ Wide View Front and Side Monitor System *3: w/ SDARS System NEXT: Go to next step
  3. INSPECT RADIO RECEIVER ASSEMBLY Disconnect the F1 and F23 receiver connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F1-5 (ATX+) - F1-15 (ATX-) Always 60 to 80 ohms F23-9 (TX+) - F23-10 (TX-) NG --> See step 6 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 Terminals of ECU. Refer to «TERMINALS OF ECU». Referring to the AVC-LAN wiring diagram, check the AVC-LAN circuit between the multi-display and the component shown by the sub-code. Disconnect all connectors between the multi-display and the component shown by the sub-code. Check for an 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 WITH NORMAL ONE AND CHECK 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 --> See step 7 OK --> END
  6. REPLACE RADIO RECEIVER ASSEMBLY. Refer to «REMOVAL»
  7. REPLACE MULTI-DISPLAY ASSEMBLY. Refer to «REMOVAL»(/lexus/lx/j200-2007-2012/remont/entertainment-systems/#audio-video-multi-display-service-information)

This circuit provides power to the radio receiver.

Scheme 265

Scheme 265: WIRING DIAGRAM
Scheme 265: WIRING DIAGRAM

Scheme 266

Scheme 266: PROCEDURE
Scheme 266: PROCEDURE
  1. INSPECT FUSE (RAD NO. 1, ACC) Disconnect the RAD NO. 1 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 RAD NO. 1 fuse Always Below 1 ohms ACC fuse NG --> REPLACE FUSE OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (RECEIVER - BATTERY AND BODY GROUND) Disconnect the F1 receiver connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F1-20 (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 F1-1 (B) - Body ground Always 11 to 14 V F1-11 (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 stereo component amplifier.

Scheme 267

Scheme 267: WIRING DIAGRAM
Scheme 267: WIRING DIAGRAM

Scheme 268

Scheme 268
Scheme 268

Scheme 269

Scheme 269: PROCEDURE
Scheme 269: PROCEDURE
  1. INSPECT FUSE (ACC, AMP) Disconnect the ACC fuse from the main body ECU. Disconnect the AMP fuse from the engine room relay block. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ACC fuse Always Below 1 ohms AMP fuse Always Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (AMPLIFIER - BATTERY AND BODY GROUND) Disconnect the F18 and F2 amplifier connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F2-2 (GND) - Body ground Always Below 1 ohms F2-6 (GND2) - Body ground Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition F2-1 (+B) - Body ground Always 11 to 14 V F2-3 (+B2)* - Body ground F18-12 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V *: for DVD Changer Models 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 multi-display.

HINT

Only vehicles without a navigation system have this circuit.

Scheme 270

Scheme 270: WIRING DIAGRAM
Scheme 270: WIRING DIAGRAM

Scheme 271

Scheme 271: PROCEDURE
Scheme 271: PROCEDURE
  1. INSPECT FUSE (TV, ACC, ECU-IG No. 1) Disconnect the ACC and ECU-IG No. 1 fuses from the main body ECU. Disconnect the TV fuse from the cowl side junction block RH. Measure the resistance according to the values in the table below. Standard Resistance Tester Connection Condition Specified Condition TV fuse Always Below 1 ohms ACC fuse ECU-IG No. 1 fuse NG --> REPLACE FUSE OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - BATTERY AND BODY GROUND) Disconnect the F28 display connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F28-10 (GND1) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F28-1 (+B1) - Body ground Always 11 to 14 V F28-2 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V F28-3 (IG) - Body ground Engine switch on (IG) 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
  3. PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»

See also:
• REMOVAL
• REMOVAL

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