Navigation (Diagnostic Codes & Symptom Tests): Overview Lexus HS I

DESCRIPTION

The display and navigation module display and multi-media interface ECU are connected by the AVC-LAN communication line.

When an AVC-LAN communication error occurs between the display and navigation module display and multi-media interface ECU, these DTCs will be stored.

HINT

1. *1: Even if no fault is present, this DTC may be stored depending on the battery condition or hybrid system start voltage.
2. The display and navigation module display is the master unit.

Scheme 146

The display and navigation module display and display module board are connected by the AVC-LAN communication line.

When an AVC-LAN communication error occurs between the display and navigation module display and display module board, these DTCs will be stored.

HINT

1. *1: Even if no fault is present, this DTC may be stored depending on the battery condition or hybrid system start voltage.
2. The display and navigation module display is the master unit.

Scheme 147

This DTC is stored when the remote touch cannot perform remote touch switch knob position initialization.

HINT

1. The remote touch performs remote touch switch knob position initialization during its initial check.
2. This DTC will be stored if there are foreign objects around the remote touch switch knob that interfere with knob operation, or if the knob is stuck, preventing the remote touch from completing knob position initialization.

When the power switch is on (ACC), if the display module board judges that the "TILT" switch in the multi-display switch built into the telltale light assembly is stuck, this DTC will be stored.

Scheme 148

Scheme 149

1. CHECK DTC Clear the DTC. Refer to DTC CHECK / CLEAR . Recheck for DTCs and check if the same DTC is output again. OK No DTCs are output. NG --> See step 2 OK --> END
2. INSPECT TELLTALE LIGHT ASSEMBLY Disconnect the F74 telltale light assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F74-3 (SW1) - F74-4 (E) "TILT" switch not pressed 10 kohms or higher F74-3 (SW1) - F74-4 (E) "TILT" switch pressed Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Telltale Light Assembly) NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR Disconnect the F74 telltale light assembly connector. Disconnect the F72 display module board. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F74-3 (SW1) - F72-13 (VCC) Always Below 1 ohms F74-3 (SW1) - Body ground Always 10 kohms or higher F74-4 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
4. REPLACE DISPLAY MODULE BOARD. Refer to DISASSEMBLY
5. REPLACE TELLTALE LIGHT ASSEMBLY. Refer to REMOVAL

The display and navigation module display and radio receiver assembly are connected by the MOST communication line.

When a MOST communication error occurs between the display and navigation module display and radio receiver assembly, these DTCs will be stored.

HINT

For the MOST network, the display and navigation module display is the master unit.

Scheme 150

The display and navigation module display and stereo component amplifier assembly are connected by the MOST communication line.

When a MOST communication error occurs between the display and navigation module display and stereo component amplifier assembly, these DTCs will be stored.

HINT

For the MOST network, the display and navigation module display is the master unit.

Scheme 151

The display and navigation module display and remote touch are connected by the MOST communication line.

When a MOST communication error occurs between the display and navigation module display and remote touch, these DTCs will be stored.

HINT

For the MOST network, the display and navigation module display is the master unit.

Scheme 152

The multi-display and display module board are connected by an AVC-LAN communication line.

The display module board and display and navigation module display are connected by an AVC-LAN communication line.

When an AVC-LAN communication error occurs between the display module board and multi-display, these DTCs will be stored.

HINT

If either B1597 or B15D6 and either B1560 or B156F are output, troubleshoot for B1560 or B156F first.

HINT

1. *1: Even if no fault is present, this DTC may be stored depending on the battery condition or hybrid system start voltage.
2. The display and navigation module display is the master unit.

Scheme 153

The display and navigation module display and meter mirror sub-assembly are connected by the AVC-LAN communication line.

When an AVC-LAN communication error occurs between the display and navigation module display and meter mirror sub-assembly, these DTCs will be stored.

HINT

1. *1: Even if no fault is present, this DTC may be stored depending on the battery condition or hybrid system start voltage.
2. The display and navigation module display is the master unit.

Scheme 154

The display and navigation module display and integration control and panel assembly are connected by the AVC-LAN communication line.

When an AVC-LAN communication error occurs between the display and navigation module display and integration control and panel assembly, these DTCs will be stored.

HINT

1. *1: Even if no fault is present, this DTC may be stored depending on the battery condition or hybrid system start voltage.
2. The display and navigation module display is the master unit.

Scheme 155

These DTCs are stored when a malfunction occurs in the display and navigation module display.

This DTC is stored when a malfunction occurs in the multi-display.

This DTC is stored when a malfunction occurs in the remote touch.

This DTC is stored when a malfunction occurs in the display and navigation module display, multi-display or display module board.

HINT

1. The trouble area cannot be determined by checking DTCs with the Techstream. It is necessary to display the "System Check Mode" screen to determine the trouble area.
2. If the picture circuit is faulty, the display and navigation module display or the multi-display stores the DTC.
3. If the multi-display open/close function is malfunctioning, the display module board stores the DTC.

Scheme 156

1. CLEAR DTC Clear the DTC. Refer to DTC CHECK / CLEAR . NEXT: Go to next step
2. CHECK FOREIGN OBJECT Check the area around the center instrument cluster finish panel assembly for obstacles or protrusions which may interrupt opening/closing of the multi-display, and also check for foreign objects stuck in moving parts. If any foreign objects are present, remove them. NEXT: Go to next step
3. CHECK DTC HINT: The trouble area cannot be determined by checking DTCs with the Techstream. It is necessary to display the "System Check Mode" screen to determine the trouble area. If the picture circuit is faulty, the multi-display or the display and navigation module display stores the DTC. If the multi-display open/close function is malfunctioning, the display module board stores the DTC. If the multi-display does not open when the power switch is turned on (ACC), manually open the multi-display and display the "System Check Mode" screen. Display the "System Check Mode" screen. Refer to DTC CHECK / CLEAR . Check result on the "System Check Mode" screen. Result Result Proceed to The trouble area cannot be determined using the "System Check Mode" screen due to a multi-display malfunction. A DTC "B15B0" is output from "EMV-M". B DTC "B15B0" is output from "DISP". C The trouble area cannot be determined using the "System Check Mode" screen because the multi-display does not open when the power switch is turned on (ACC). D DTC "B15B0" is output from "MOTOR-C". D No DTCs are output. E TEXT IN ILLUSTRATION *1 Example E --> See step 7 D --> See step 9 C --> See step 6 B --> See step 5 A: Go to next step
4. REPLACE MULTI-DISPLAY Replace the multi-display. Refer to DISASSEMBLY . Clear the DTCs. Refer to DTC CHECK / CLEAR . Recheck for DTCs and check if the same DTC is output again. OK No DTCs are output. NG --> See step 8 OK --> END
5. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL
6. REPLACE MULTI-DISPLAY. DISASSEMBLY
7. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
8. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL
9. CHECK CENTER INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY (DRIVING PART USED FOR DRIVEN PART OF MULTI-DISPLAY) Check that there is no damage on the driving parts that drive the multi-display and that no foreign objects are caught.. Refer to DISASSEMBLY Result Result Proceed to Damage on the driving parts. A Foreign objects are caught between the driving parts. B No damage on the driving parts and no foreign objects are caught between the driving parts. C C --> See step 12 B --> See step 11 A: Go to next step
10. REPLACE DAMAGED DRIVING PART Replace damaged driving parts. Refer to DISASSEMBLY . Clear the DTCs. Refer to DTC CHECK / CLEAR . Recheck for DTCs and check if the same DTC is output again. OK No DTCs are output. NG --> See step 12 OK --> END
11. REMOVE FOREIGN OBJECT Remove foreign objects caught between the driving parts. Clear the DTCs. Refer to DTC CHECK / CLEAR . Recheck for DTCs and check if the same DTC is output again. OK No DTCs are output. NG --> See step 12 OK --> END
12. REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSEMBLY Replace the multi-display controller sub-assembly. Refer to DISASSEMBLY . Clear the DTCs. Refer to DTC CHECK / CLEAR . Recheck for DTCs and check if the same DTC is output again. OK No DTCs are output. NG --> See step 13 OK --> END
13. REPLACE SENSOR WIRE Replace the sensor wire. Refer to DISASSEMBLY . Clear the DTCs. Refer to DTC CHECK / CLEAR . Recheck for DTCs and check if the same DTC is output again. OK No DTCs are output. NG --> See step 14 OK --> END
14. REPLACE DISPLAY MODULE BOARD. Refer to DISASSEMBLY

This DTC is stored when the hard disk drive which is built into the display and navigation module display has an initialization malfunction or read/write errors occur more than a specified number of times.

Scheme 157

1. CHECK HARD DISK DRIVE (OPERATION CHECK) Enter the "Failure Diagnosis" screen. Refer to Check Hard Disk Drive in Operation Check. Refer to OPERATION CHECK . Select "HDD Check" and check the result. OK "OK" is displayed. HINT: After selecting "HDD Check", it may take a while until the result is displayed. If the cabin temperature is -20°C (-4°F) or lower, or 65°C (149°F) or higher, the HDD may not operate normally, and "NG" may be shown on the display. Make sure to perform the inspection with the cabin at an appropriate temperature. TEXT IN ILLUSTRATION *1 Result NG --> See step 4 OK: Go to next step
2. CHECK DTC Clear the DTC. Refer to DTC CHECK / CLEAR . Recheck for DTCs and check if the same DTC is output again. OK No DTC are output. HINT: The hard disk drive may be malfunctioning even if DTC B15B8 is not output. NG --> See step 5 OK --> See step 3
3. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
4. REPLACE HARD DISK DRIVE. Refer to REMOVAL
5. REPLACE HARD DISK DRIVE. Refer to REMOVAL

These DTCs are stored when a malfunction occurs in the navigation antenna assembly.

The display and navigation module display receives a vehicle speed signal from the combination meter assembly and information from the navigation antenna, and then adjusts the vehicle position on the map.

The display and navigation module display stores this DTC when the difference between the speed information that the navigation antenna receives and the SPD pulse received from the combination meter assembly becomes large.

HINT

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

Scheme 158

Scheme 159

Scheme 160

1. CHECK VEHICLE SENSOR (OPERATION CHECK) Enter the "Vehicle Sensors" screen. Refer to Check GPS & Vehicle Sensor in Operation Check. Refer to OPERATION CHECK. While driving the vehicle, compare the "Speed" indicator to the reading on the speedometer. Check if these readings are almost equal. HINT: The meter ECU receives the vehicle speed signal from the skid control ECU via CAN communication. Therefore, perform the following inspection referring to values on the Data List of the skid control ECU because it is the source of the vehicle speed signal. OK Vehicle speed displayed on the "Vehicle Sensors" screen is almost the same as the actual vehicle speed measured using the Techstream. Refer to DATA LIST / ACTIVE TEST. NG --> See step 3 OK --> See step 2
2. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL
3. INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM) Check the output waveform. Reconnect the F4 combination meter assembly connector. Remove the combination meter assembly with the connector(s) still connected. Connect an oscilloscope to terminal F4-40 (+S) and body ground. Turn the power switch on (READY). Turn a wheel slowly. Check the signal waveform according to the condition(s) in the table below. Item Condition Measurement terminal F4-40 (+S) - Body ground Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Wheel being rotated OK The waveform (Scheme 160) is similar to that shown in the illustration. HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows. TEXT IN ILLUSTRATION *1 Component with harness connected (Combination Meter Assembly) NG --> See step 8 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR Disconnect the F30 display and navigation module display connector. Disconnect the F4 combination meter assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F30-18 (SPD) - F4-40 (+S) Always Below 1 ohms NG --> See step 6 OK --> See step 5
5. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL
6. CHECK HARNESS AND CONNECTOR Disconnect the F30 display and navigation module display connector. Disconnect the F96 junction connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F30-18 (SPD) - F96-33 Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
7. CHECK HARNESS AND CONNECTOR Disconnect the F4 combination meter assembly connector. Disconnect the F96 junction connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F4-40 (+S) - F96-53 Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE JUNCTION CONNECTOR
8. GO TO METER / GAUGE SYSTEM. Refer to Speed Signal Circuit

This DTC is stored when the MOST network cannot be established after the master unit is activated.

HINT

1. If a short occurs in a speaker circuit, the sound from the corresponding speaker will be low or almost impossible to hear. If the volume is turned up in this situation, to prevent excessive current flow due to the short circuit, the stereo component amplifier assembly stops operating when its output exceeds a certain level. When the operation of the stereo component amplifier assembly stops, the navigation system will not function normally. This is because MOST communication will stop due to the shut down of the amplifier causing an error in the MOST network. The stereo component amplifier assembly will start operating again when the power switch is turned off and back on (ACC) again. However, the amplifier will stop operating again if its output exceeds a certain level. (for 15 speakers)
2. When the stereo component amplifier assembly stops operating and a malfunction occurs in the navigation system due to a short in a speaker circuit, this DTC will be stored. (for 15 speakers)

HINT

1. For the MOST network, the display and navigation module display is the master unit.
2. Errors may occur in MOST communication between devices due to problems such as electrical noise.

Scheme 161

The display and navigation module display and parking assist ECU are connected by the AVC-LAN communication line.

When an AVC-LAN communication error occurs between the display and navigation module display and parking assist ECU, this DTC will be stored.

HINT

The display and navigation module display is the master unit.

Scheme 162

These DTCs are stored when the temperature is higher or lower than the operation range of the hard disk drive built into the display and navigation module display, and hard disk drive read/write errors occur more than a specified number of times.

HINT

The hard disk drive may not operate normally when the temperature is -20°C (-4°F) or lower, or 65°C (149°F) or higher.

This DTC is stored when items controlled by the A/C ECU (air conditioning amplifier assembly) cannot be customized via the navigation system vehicle customization screen.

HINT

The A/C ECU (air conditioning amplifier assembly) controls the air conditioning system related items that are customizable via the multi-display screen.

Scheme 163

1. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . OK CAN communication DTC is not output. NG --> See step 5 OK: Go to next step
2. CHECK AIR CONDITIONING SYSTEM Check if the air conditioning system is malfunctioning. Refer to HOW TO PROCEED WITH TROUBLESHOOTING . HINT: Customization may not be possible depending on the malfunction in the air conditioning system. OK No malfunctions are present in the air conditioning system. NG --> See step 6 OK: Go to next step
3. CHECK CUSTOMIZE ITEMS Display the "Vehicle Customization" screen. Make a note of the customizable items for the air conditioning system. HINT: These air conditioning system items shown as customizable via the multi-display vehicle customization screen can also be changed using the Techstream. In the following steps, the Techstream will be used. To match-up the items in the multi-display with the items on the Techstream, check the customize parameters list for the air conditioning system related items that can be customized via the multi-display screen. Refer to CUSTOMIZE PARAMETERS . Using the Techstream, confirm that it is possible to change the settings of the air conditioning system related customize parameters that are shown as customizable via the multi-display screen. OK The items available for customization via the multi-display screen can be customized successfully using the Techstream. TEXT IN ILLUSTRATION *1 Example NG --> See step 7 OK --> See step 4
4. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL
5. GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
6. GO TO AIR CONDITIONING SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
7. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to REMOVAL

This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the navigation system vehicle customization screen.

HINT

The main body ECU (multiplex network body ECU) controls the items for the following systems that are customizable via the multi-display screen

1. Power door lock control system
2. Wireless door lock control system
3. Lighting system (for interior)
4. Lighting system (for exterior)
5. Front power seat control system (w/ Memory)

This DTC is stored when items controlled by the certification ECU (smart key ECU assembly) cannot be customized via the navigation system vehicle customization screen.

HINT

The certification ECU (smart key ECU assembly) controls the smart access system with push-button start (for Entry Function) related items that are customizable via the multi-display screen.

These DTCs are stored when a malfunction occurs in the CAN communication circuit.

When the navigation system is activated with the light control switch in the tail or head position, before AVC-LAN communication is established, the multi-display dims the display according to the illumination signal received via a direct line.

After AVC-LAN communication is established, the multi-display dims the display according to a dimmer signal sent via AVC-LAN communication.

The display and navigation module display switches between the daytime screen and night screen on the multi-display according to the illumination signal input.

Scheme 164

When the remote touch switch knob is operated, the built-in 2-axis motors are controlled. The motors are used to provide feedback force for the knob according to the pointer operation displayed on the multi-display.

Scheme 165

Scheme 166

1. REMOTE TOUCH SELF CHECK (CHECK DTC) Activate self check mode. Refer to OPERATION CHECK . Check DTC Move the remote touch switch knob to the lower left to check the switch illumination condition. Result Result Proceed to Switch illumination turns on. A Switch illumination blinks repeatedly. B TEXT IN ILLUSTRATION *1 Switch Illumination *2 Switch Knob B --> See step 5 A: Go to next step
2. REMOTE TOUCH SELF CHECK (REMOTE TOUCH SWITCH KNOB FEEDBACK FORCE GENERATION CHECK) Check the remote touch switch knob feedback force generated. Move the remote touch switch knob up, down, right and left to check that feedback force is generated. OK Feedback force is generated. HINT: When the power switch is on (ACC), feedback force is generated. When the power switch is off, feedback force is not generated, and the remote touch switch knob will move freely. TEXT IN ILLUSTRATION *1 Switch Knob *2 Control Direction *3 Feedback Force NG --> See step 6 OK: Go to next step
3. REMOTE TOUCH SELF CHECK (FEEDBACK FORCE FUNCTION) Check feedback force function Move the pointer on the screen by operating the remote touch switch knob and check that the feedback force of the knob changes according to the screen being displayed and the pointer position. HINT: Refer to Remote Touch Outline for further information on remote touch switch knob feedback force generated according to the screen being displayed and the pointer position. Refer to SYSTEM DESCRIPTION . Result Result Proceed to Feedback force of the remote touch switch knob does not change according to the screen being displayed and the pointer position. A Feedback force of the remote touch switch knob changes according to the screen being displayed and the pointer position. B B --> See step 7 A --> See step 4
4. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL
5. REPLACE REMOTE OPERATION BOARD. Refer to REMOVAL
6. REPLACE REMOTE OPERATION BOARD. Refer to REMOVAL
7. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

Power is supplied to the remote touch illumination when the light control switch is in the tail or head position.

HINT

Only the "MAP/VOICE" and "MENU" switches on the remote touch illuminate.

Scheme 167

Power is supplied to the remote touch illumination when the light control switch is in the tail or head position.

HINT

1. When the remote touch is in self check mode, the switch illumination on the remote touch may remain on.
2. If any illumination controlled by the rheostat switch has a malfunction such as an open circuit, the switch illumination of the remote touch is affected and cannot be controlled by the rheostat switch.

Scheme 168

This circuit sends an operation signal from the steering pad switch assembly to the display and navigation module display.

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

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

Scheme 169

Power is supplied to the steering pad switch assembly and telltale light assembly (multi-display switch) illumination when the light control switch is in the tail or head position.

Scheme 170

This circuit is from the parking brake switch assembly to the display and navigation module display.

Scheme 171

Scheme 172

1. CHECK BRAKE WARNING LIGHT Check that the brake warning light comes on when the parking brake is applied and goes off when it is released. OK The brake warning light operates as specified above. NG --> See step 3 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR Disconnect the F30 display and navigation module display connector. Disconnect the A24 parking brake switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F30-17 (PKB) - A24-1 Always Below 1 ohms F30-17 (PKB) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
3. INSPECT PARKING BRAKE SWITCH ASSEMBLY Disconnect the parking brake switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Switch connector - Switch body ON (When shaft is not pressed) Below 1 ohms Switch connector - Switch body OFF (When shaft is pressed) 10 kohms or higher NG --> See step 5 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR
4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
5. REPLACE PARKING BRAKE SWITCH ASSEMBLY. Refer to REMOVAL

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

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

The display image signal*1 from the display and navigation module display is sent to the multi-display using a digital communication cable.

1. *1: Except DVD image signal for vehicles with DVD player.

Scheme 173

8DESCRIPTION

This circuit sends a DVD image signal from the radio receiver assembly to the display and navigation module display.

Scheme 174

This circuit sends a DVD image signal from the display and navigation module display to the multi-display.

Scheme 175

Scheme 176

Scheme 177

Scheme 178

1. CHECK HARNESS AND CONNECTOR Disconnect the F31 display and navigation module display connector. Disconnect the F37 multi-media module wire connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F31-10 (NTSF) - F37-2 (NTS1) Always Below 1 ohms F31-21 (SGD1) - F37-7 (SGN1) Always Below 1 ohms F31-10 (NTSF) - Body ground Always 10 kohms or higher F31-21 (SGD1) - Body ground Always 10 kohms or higher F31-22 (SLD1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. INSPECT MULTI-MEDIA MODULE WIRE Disconnect the F37 multi-media module wire connector. Disconnect the DC1 multi-media module wire connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F37-2 (NTS1) - DC1-4 (NTS1) Always Below 1 ohms F37-7 (SGN1) - DC1-16 (SGN1) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (multi-media module wire) NG --> See step 5 OK: Go to next step
3. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY (DVD IMAGE SIGNAL) Reconnect the F31 display and navigation module display connector. Check the waveform see scheme 95 according to the table below. Oscilloscope waveform Item Content Measurement terminal F31-10 (NTSF) - Body ground Measurement setting 200 mV/DIV., 10 μs/DIV. Condition DVD is played on multi-display HINT: The video waveform changes according to the image output from the display and navigation module display to the multi-display, but the synchronization signal does not change. TEXT IN ILLUSTRATION *1 Component with harness connected (Display and Navigation Module Display) *2 Synchronization Signal *3 Video Waveform see scheme 90 NG --> See step 6 OK --> See step 4
4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
5. REPLACE MULTI-MEDIA MODULE WIRE. Refer to DISASSEMBLY
6. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL

The display signal*1 from the display and navigation module display is sent to the parking assist ECU using a digital communication cable.

*1: Except DVD image signal for vehicles with DVD player.

Scheme 179

The display signal*1 from the parking assist ECU is sent to the multi-display using a digital communication cable.

*1: Except DVD image signal for vehicles with DVD player.

Scheme 180

The display and navigation module display sends a visual mute signal to the multi-display. As a result, a black screen is inserted when the screen changes so that noise and distorted images are not displayed.

When an open exists in the circuit, noise and distorted images will be displayed instead of a black screen.

When a short exists in the circuit, even though the multi-display is operating normally, noise and distorted images will be displayed (black screen will not be displayed) during screen changes or the black screen will always be displayed.

Scheme 181

Scheme 182

1. INSPECT MULTI-MEDIA MODULE WIRE Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F37-9 (VMT1) - Body ground Power switch on (ACC), screen display changes. 3.5 V or higher --> Below 1 V --> 3.5 V or higher TEXT IN ILLUSTRATION *1 Component with harness connected (Multi-media Module Wire) NG --> See step 3 OK --> See step 2
2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
3. CHECK HARNESS AND CONNECTOR Disconnect the F37 multi-media module wire connector. Disconnect the F31 display and navigation module display connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F37-9 (VMT1) - F31-11 (VMTF) Always Below 1 ohms F37-9 (VMT1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. REPLACE MULTI-MEDIA MODULE WIRE Replace the multi-media module wire and check if the navigation system operates normally. Refer to DISASSEMBLY . OK The navigation system operates normally. NG --> See step 5 OK --> END
5. REPLACE MULTI-DISPLAY Replace the multi-display and check if the navigation system operates normally. Refer to DISASSEMBLY . OK The navigation system operates normally. NG --> See step 6 OK --> END
6. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL

1. The display and navigation module display and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.
2. Using this circuit, the display and navigation module display sends power to the map light assembly (telephone microphone assembly), and the map light assembly sends microphone signals to the display and navigation module display. (w/o manual (SOS) switch)
3. Using this circuit, the DCM (telematics transceiver) sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the display and navigation module display via the DCM (telematics transceiver).

Scheme 183

The center instrument cluster finish panel assembly (multi-display) opens, closes and tilts the multi-display according to the operation of the "OPEN/CLOSE" and "TILT" switches of the multi-display switch built into the telltale light assembly.

Scheme 184

Scheme 185

1. INSPECT TELLTALE LIGHT ASSEMBLY (MULTI-DISPLAY SWITCH) Disconnect the F74 telltale light assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F74-3 (SW1) - F74-4 (E) "OPEN/CLOSE" switch not pressed 10 kohms or higher F74-3 (SW1) - F74-4 (E) "OPEN/CLOSE" switch pressed Below 1 ohms F74-2 (SW2) - F74-4 (E) "TILT" switch not pressed 10 kohms or higher F74-2 (SW2) - F74-4 (E) "TILT" switch pressed Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Telltale Light Assembly) NG --> See step 4 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR Disconnect the F74 telltale light assembly connector. Disconnect the F72 display module board connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F74-3 (SW1) - F72-13 (VCC) Always Below 1 ohms F74-2 (SW2) - F72-14 (VDD) Always Below 1 ohms F74-3 (SW1) - Body ground Always 10 kohms or higher F74-2 (SW2) - Body ground Always 10 kohms or higher F74-4 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
3. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
4. REPLACE TELLTALE LIGHT ASSEMBLY. Refer to REMOVAL

This is the power source circuit to operate the display and navigation module display.

Scheme 186

See also:
• REMOVAL
• REMOVAL
• REMOVAL