Section 427 (LEXUS Navigation System - Diagnosis): Pre-Check
WARNING: This page is about a different car, the 2004 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
- DIAGNOSTIC START-UP/FINISH
HINT:
- The illustrations may differ depending on the device settings (option, etc.). Therefore, some detailed areas may not be shown exactly same as on the actual vehicle.
- After the ignition switch is turned on, check that the map is displayed before starting the diagnostic mode. Otherwise, some items cannot be checked.
- There are 2 methods to start diagnostic mode. start the mode by using one of them.
- Method 1
- Start the engine.
- While pressing and holding "INFO" switch, operate "TAIL" switch, OFF --> TAIL --> OFF --> TAIL --> OFF --> TAIL --> OFF.
- The diagnostic mode starts and "Service Check" screen will be displayed. Service inspection starts automatically and the result will be displayed.
- Method 2
- Start the engine.
- Switch to the "Display Check" screen.
- From the display adjustment screen, touch the corners of the screen in the following order: upper left --> lower left --> upper left --> lower left --> upper left lower left.
- The diagnostic mode starts and "Service Check" screen will be displayed. Service inspection starts automatically and the result will be displayed.
- Diagnosis MENU
Pressing the menu switch on the service check screen, diagnostic window will be displayed.
- There are 2 methods to exit. Use one of them.
- Turn the ignition switch off.
- Press the "Display" switch for 3 seconds.
- SYSTEM CHECK MODE (DTC CHECK)
HINT:
The illustrations may differ depending on the device settings (option, etc.). Therefore, some detailed areas, may not be shown exactly same as on the actual vehicle.
- Start the diagnostic mode.
- Read the service check result.
If all devices report is "EXCH", "CHEK" or "Old" touch the display to check the contents on the "Unit Check Mode" screen and fill them on the customer problem analysis check sheet.
HINT:
- If all check result are "OK" go to communication DTC check (Go to step 3).
- If a device name is not known, its physical address is displayed.
HINT:
If "EXCH", "CHEK" and "Old" as well as "OK" exist, press the service switch to return to the "System Check Mode". Then, check the "Unit Check Mode" screen and fill them in on the customer problem analysis check sheet.
- Read the communication diagnostic check result.
- Return to the "System Check Mode", and press "LAN Mon" switch to enter the LAN monitor window.
- If the result is "CHEK" or "Old" touch this display to check the contents on the "Unit Check Mode" screen and fill them in on the customer problem analysis check sheet.
HINT:
- If all check result are "No Err" the system judges that non DTC exists.
- The sub-code (relevant device) will be indicated by its physical address.
HINT:
If other devices return "CHEK" press the "Service" switch to return to the "LAN Monitor" screen. Then, check the Individual communication diagnostic screen for the next device and fill out the result on the customer problem analysis check sheet.
- SERVICE CHECK MODE (DTC CLEAR/RECHECK)
HINT:
The illustrations may differ from the actual vehicle depending on the device settings and options.
- Clear DTC
- Press "Memory CLR" switch for 3 seconds.
- Check result is cleared.
- Recheck
- Press the "Recheck" switch.
- Confirm that all diagnostic codes are "OK" when the check results are displayed.
If a code other than "OK" is displayed, troubleshoot again.
- Press "LAN Mon" to switch to "LAN Monitor" mode.
- Confirm that all diagnostic codes are "No Err". If a code other than "No Err" is displayed, troubleshoot again.
- Clear DTC
- DISPLAY CHECK MODE (TOUCH SWITCH CHECK)
HINT:
- This mode checks the touch switch operation condition on the multi-display.
- Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
- Select "Display Check" from the "Diagnosis MENU" screen.
- Select "Touch Switch Check" from the "Display Check" screen.
- Touch the display anywhere in the open area to perform the check when the "Touch Switch Check" screen is displayed.
HINT:
- A "+" mark is displayed where the display is touched.
- The "+" mark remains on the display even after the finger is removed.
- DISPLAY CHECK MODE (PANEL SWITCH CHECK)
HINT:
- This mode checks the panel switch operation response on the multi-display.
- Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
- Select "Display Check" from the "Diagnosis MENU" screen.
- Select "Touch Switch Check" from the "Display Check" screen.
- Operate each switch and check that the switch name and condition is correctly displayed.
HINT:
Pressing the "DISPLAY" switch for 3 seconds will exit the diagnostic mode.
DISPLAY CONTENTSDisplay Contents Push switch name/*1 - Name of the pressed switch is displayed.
- If more than one switch is pressed, "MULTIPLE" is displayed.
Rotary switch name/*2 Name of the rotary switch is displayed. Rotary switch direction/*3 Direction of the rotary switch is rotated. - DISPLAY CHECK MODE (VEHICLE SIGNAL CHECK)
HINT:
- This mode checks the vehicle signal status input to the multi-display.
- Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
- Select "Display Check" from the "Diagnosis MENU" screen.
- Select "Touch Switch Check" from the "Display Check" screen.
- When the "Vehicle Signal Check Mode" screen is displayed, check all the vehicle signal conditions.
- NAVIGATION CHECK MODE (VEHICLE SENSORS)
HINT:
- This mode checks the vehicle signal status to the navigation ECU.
- Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
- Select "Navigation Check" from the "Diagnosis MENU" screen.
- Select "Touch Switch Check" from the "Display Check" screen.
- Check all the signals and sensors when vehicle signal information is displayed.
HINT:
This screen is updated once per second when input signals to the vehicle are changed.
- NAVIGATION CHECK MODE (NAVI COLOR VAR CHECK)
HINT:
- This mode checks the color display on the navigation ECU.
- Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
- Select "Navigation Check" from the "Diagnosis MENU" screen.
- Select "Touch Switch Check" from the "Display Check" screen.
- Check each color of the color bar when the "NAVI Color Bar Check" screen is displayed.
HINT:
Colors will not be displayed full-screen as in "Display Check Mode".
- NAVIGATION CHECK MODE (PARTS INFORMATION)
HINT:
- This mode displays product information on the navigation systems and discs.
- Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
- Select "Navigation Check" from the "Diagnosis MENU" screen.
- Select "Touch Switch Check" from the "Display Check" screen.
- Check the navigation and disc information when the "Parts Information" screen is displayed.
DISPLAY CONTENTSDisplay Contents Navigation Manufacturer/*1 Navigation ECU manufacturer name is displayed. Navigation Version/*2 Navigation ECU version is displayed. Disc Manufacturer/*3 Map disc manufacturer is displayed. Disc Version/*4 Map disc version is displayed. - DIAGNOSIS DISPLAY DETAILED DESCRIPTION
HINT:
- This section contains a detailed description of displays within diagnostic mode.
- Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
- System check
- System check mode display
Device Names and hardware Address/*1
HINT:
- Registered device names are displayed below.
- If a device name is unknown to the system, its physical address is shown instead.
DEVICE NAMES AND HARDWARE ADDRESS/*1Address No. Name Address No Name 110 EMV 120 AVX 128 1DIN TV 140 AVN 144 G-BOOK 178 NAVI 17C MONET 190 AUDIO H/U 1AC CAMERA-C 1B0 Rr-TV 1C0 Rr-CONT 1C2 TV-TUNER2 1C4 PANEL 1C6 G/W 1C8 FM-M-LCD 1D8 CONT-SW 1EC Body 1F0 RADIO TUNER 1F1 XM 1F2 SIRIUS 230 TV-TUNER 240 CD-CH2 250 DVD-CH 280 CAMERA 360 CD-CH1 3A0 MD-CH 17D TEL 440 DSP-AMP 530 ETC 5C8 MAYDAY 1A0 DVD-P 1C6 CLOCK 1F4 RSA 1F8 RSE 480 AMP Check Result/*2
HINT:
Result codes for all devices are shown below.
CHECK RESULT/*2Result Meaning Action OK The device did not respond with a DTC (excluding communication DTCs from the AVC-LAN). - EXCH The device responds with a "replace"-type DTC. Look up the DTC in "Unit Check Mode" and replace the device. CHEK The device responds with a "check"-type DTC. Look up the DTC in "Unit Check Mode". NCON The device was previously present, but does not respond in diagnostic mode. - Check power supply wire harness of the device.
- Check the AVC-LAN of the device.
Old The device responds with an "old"-type DTC. Look up the DTC in "Unit Check Mode". NRES The device responds in diagnostic mode, but gives no DTC information. - Check power supply wire harness of the device.
- Check the AVC-LAN of the device.
Code Clear/*3
Present DTCs are cleared.
Memory Clear/*4
Present and past DTCs and registered connected device names are cleared.
- Diagnosis MENU Display
HINT:
Each item is grayed out or not displayed based on the device settings.
- Unit check mode screen
Screen Description
SCREEN DESCRIPTIONDisplay Contents Device name/*1 Target Device Segment/*2 Target Device Logical address DTC/*3 DTC (Diagnostic Trouble Code) Timestamp/*4 The time and date of past DTCs displayed. (The year is displayed in 2 digit format.) Present Code/*5 The DTC output at the service check is displayed. Past Code/*6 Diagnostic memory results and recorded DTCs are displayed. - LAN monitor (Original) screen
Check result
HINT:
Check results of all the devices are displayed.
CHECK RESULTResult Meaning Action No Err (OK) There are no communication DTCs. - CHEK The device responds with a "check"-type DTC. Look up the DTC in "Unit Check Mode". NCON The device was previously present, but does not respond in diagnostic mode. - Check power supply wire harness of the device.
- Check the AVC-LAN of the device.
Old The device responded with an old-type DTC. Look up the DTC in "Unit Check Mode". NRES Device responds in diagnostic mode, but gives no DTC information. - Check power supply wire harness of the device.
- Check the AVC-LAN of the device.
- LAN monitor (Individual) screen
Screen Description
SCREEN DESCRIPTIONDisplay Contents Device name/*1 Target device Segment/*2 Target logical address DTC/*3 DTC (Diagnostic Trouble Code) Sub-Code (device address)/*4 Physical address stored with DTC. (If there is no address, nothing is displayed.) Connection check No./*5 Connection check number stored with DTC. DTC occurrence/*6 Number of times the same DTC has been recorded. - System check mode display
- Display check
Vehicle signal check mode screen
Screen Description
SCREEN DESCRIPTIONName Contents Battery Battery voltage is displayed. PKB Parking brake ON/OFF state is displayed. REV Reverse signal ON/OFF state is displayed. IG IG switch ON/OFF state is displayed. ADIM/TCAN Brightness state DIM (with)/ BRIGHT (without) is displayed. SPEED The vehicle speed, displayed in km/h. TAIL TAIL signal (Head lamp dimmer switch) ON/OFF state is displayed. HINT:
- Only items sending a vehicle signal will be displayed.
- This screen is updated once per second when input signals to the vehicle are changed.
- Navigation check
- Navigation check MENU screen
HINT:
Each item is grayed out or not displayed based on the device settings.
- GPS information screen
Satellite information/*1
Information from a maximum of 12 satellites is displayed on the screen. This information includes the target GPS satellite number, elevation angle, direction and signal level.
Receiving condition/*2
RECEIVING CONDITION/*2Display Contents T The system is receiving a GPS signal, but is not using it for location. P The system is using the GPS signal for location. - The system cannot receive a GPS signal. Measurement information/*3
MEASUREMENT INFORMATION/*3Display Contents 2D 2-dimensional location method is being used. 3D 3-dimensional location method is being used. NG Location data cannot be used. Error Reception error has occurred. - Any other state. Position information/*4
POSITION INFORMATION/*4Display Contents Position Latitude and longitude information on the current position is displayed. Date information/*5
DATE INFORMATION/*5Display Contents Date The date/time information obtained from GPS signal is displayed in Greenwich mean time (GMT). The last 4 digits are displayed. - Vehicle signal check screen
Vehicle signal
VEHICLE SIGNALDisplay Contents REV/*1 REV signal ON/OFF state is displayed. SPD/*2 SPD signal condition is displayed. Sensor signal
SENSOR SIGNALDisplay Contents Gyro sensor/*3 Gyro sensor output condition is displayed (when the vehicle runs straight or is stationary, the voltage is approximately 2.5 V). HINT:
Signals are updated once per second only when vehicle sensor signals are changed.
- Parts information screen
Screen description
SCREEN DESCRIPTIONDisplay Contents Navigation Manufacturer/*1 Navigation ECU manufacturer is displayed. Navigation Version No./*2 Navigation ECU version is displayed. Disc Manufacturer/*3 Map disc manufacturer is displayed. Disc Version No./*4 Map disc version is displayed. - Memory copy/paste screen
- Navigation check MENU screen
HINT:
This function cannot be used.
- SCREEN NOISE AUTOMATIC ADJUSTMENT
HINT:
- This adjustment is performed to reduce noise when screen noise occurs upon replacing the multi-display, the navigation ECU or the television camera ECU.
- Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
- Perform both procedures below when the multi-display is replaced.
- When either the multi-display or the navigation ECU is replaced:
- Turn the ignition switch to the ACC position and wait for at least 6 seconds to activate the diagnostic mode.
- Select "Navigation Check" from the "Diagnosis MENU" screen.
- The screen enters "Navigation Check" with a beeping sound. Adjustment is completed when the completion mark is displayed.
- Cancel the diagnostic mode.
- When either the multi-display or the television camera ECU is replaced:
- Turn the ignition switch to the ACC position and wait for at least 6 seconds to activate the diagnostic mode.
- Select "Camera Check" from the "Diagnosis MENU" screen.
- Adjustment is completed when the steering angle setting screen is displayed.
- Cancel the diagnostic mode.
HINT:
- If the automatic adjustment is not performed (only step 1) only upon replacing the multi-display, a beeping sound can be heard for 3 seconds (while the initial screen is displayed) after turning the ignition switch to the ACC position.
- Perform the automatic adjustment again if a beeping sound can be heard within 3 seconds.