Section 858 (LEXUS Navigation System - Diagnosis): Pre-Check

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

USER TROUBLES UNDER NORMAL CONDITION OF THE NAVIGATION SYSTEM
1. Voice guidance is not performed even though the system is in normal condition when:
  1. The destination is not set up.
  2. The vehicle is not driving on the set route. (The remaining distance is not displayed at the lower left of the map screen that tells the current position of the vehicle.)
  3. "Guidance in Other Modes" is not set up. (In this case no voice guidance is given except on the map screen.)
2. The vehicle icon turns around arbitrarily on the screen even when the system is in normal condition. If the ignition switch is turned to "ACC" or "ON" while the vehicle is turning around such as being on the turntable, the Navigation System memorizes the angle speed of that moment as the standard figure. To solve this problem, at the vehicle speed of 0 MPH (0 km/h), turn off the ignition switch and, then turn it to "ACC" or "ON" again, and see whether any trouble occurs again.
INSPECTION OF THE LOCATION WITH TROUBLE OCCURRENCE
Examine whether the wrong display of the vehicle icon appears in a certain location or in several locations.

HINT:

It is difficult to determine the accurate vehicle position when driving on a freeway, a looped road or a road which runs in parallel with another, and immediately after going a out of the parking area. In such cases the vehicle icon can be displayed off the real position of the vehicle.
WIRING DIAGRAM
1. Navigation System Wiring Diagram
  
  Fig 1: Wiring Diagram - Navigation System
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Audio System Wiring Diagram
  
  Fig 2: Wiring Diagram - Audio System (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Wiring Diagram - Audio System (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Cellular Mobile Telephone System Wiring Diagram:
  
  Fig 4: Wiring Diagram - Cellular Mobile Telephone System
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DIAGNOSIS SYSTEM MODE

HINT:

Diagnosis System Mode is operated as follows.

Fig 5: Diagnosis System Mode Flow Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Start-up and finishing of the diagnosis
HINT:

Before starting the Diagnosis System, make sure that the map appears on the screen after turning on the IG switch. If not, some items cannot be checked.

Diagnosis Start-up by light control switch.

Vehicle speed should be 0 km/h (0 mph).
Apply the parking brake.
Turn the ignition switch to ACC or ON.

While pressing the "OPTION" switches on the Multi Display, turn the Light Control switch from OFF --> TAIL --> OFF --> TAIL --> OFF --> TAIL --> OFF.

DESCRIPTION

Display	Description
Service Check	By performing system check and collecting data of diagnosis memory, this mode checks the current and past condition of each connection device.
Display Check	It displays the Display Check on the screen.
Navigation Check	It displays the Navigation ECU Check on the screen.

HINT:

When Diagnosis System starts, Service Check screen is displayed and the service check begins.
Select MENU to display Diagnosis Check Menu.

Fig 6: Identifying Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Diagnosis Start-Up by touch switch.
1. Vehicle speed should be 0 km/h (0 mph).
2. Apply the parking brake.
3. Turn the ignition switch to ACC or ON.
4. Activate the screen adjustment screen.
5. Alternately touch the upper and lower bottom parts of the left end of the screen 3 times.
  
  Fig 7: Identifying Display Of Concealed Touch Switch
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Finishing the Diagnosis System
Turn the ignition switch off to finish the mode.

SERVICE CHECK MODE

HINT:

Service Check Mode is operated as follows.

Fig 8: Service Check Mode Flow Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

System Check Mode

Start the Diagnosis System.

FUNCTION

Display Item	Function
Components Name/*1	List of component names including optional components (15 components max.) are displayed. When the names are not identified, their physical addresses are displayed.
Check Result/*2	Check results are displayed.
Memory Clear switch/*3	Pressing this switch for 3 sec. deletes all the information about master component registration.
DTC Clear switch/*4	Pressing this switch for 3 sec. deletes diagnosis memory of all the components. It deletes Service Check results and the screen displaying the check results.
Recheck/*5	Pressing this switch performs Service Check again.
MENU/*6	Pressing this switch activates the Diagnosis Menu screen.

HINT:

Service Check displays the check results based on the information obtained from each component's response to "System Check Execution" and "Diagnosis Memory Request", and the information of "Current DTC Notification" (the Unit Check that will be displayed on the next screens.).

Read Check Result

CHECK RESULT

Check Result	Meaning
OK	No DTC is identified.
EXCH	One or more DTC requesting for exchange are detected.
CHEK	One or more DTC requesting for check are detected.
NCON	No connection response to Diagnosis System start-up, whereas it has the connection response to the AVC LAN system when the power switch is turned on (when IG is turned to ACC).
Old	One or more DTC are detected because of old version.
NRES	No response to the information about the Diagnosis System, whereas it responds to the Diagnosis System start-up.

HINT:

After repair and check, press "Code CLR" for more than 3 sec. to delete diagnosis memory.
After deleting diagnosis memory, press "Recheck" and make sure "OK" is displayed on the screen.

Fig 9: Display Service Check Mode
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

"EXCH", "CHEK" and "Old" can be used as switches to activate "LAN Check Mode" and "Unit Check Mode" for detail information. Check troubled parts of the components in these modes by referring to the DTC code list.

DESCRIPTION

Display Item	Description
Components name/*1	Names of components to be checked are displayed.
Segment/*2	Logical address codes corresponding to DTC are displayed.
DTC/*3	DTC is displayed.
Sub-Code (address numbers of related components)/*4	Physical address codes memorized together with DTC are displayed.
Sub-code (Connection confirmation number) /*5	Connection confirmation numbers memorized together with DTC are displayed.
Sub-code (Number of occurrence) /*6	The number of occurrence of the same DTC is displayed.
DTC clear switch/*7	Pressing this switch for 3 sec. deletes DTC memory of the selected diagnosis component.
Service check mode screen switch/*8	Pressing this returns to the Service Check Mode screen.
Unit check mode screen switch/*9	Pressing this switch activates the Unit Check Mode screen, which displays the logical address 01 with DTC 00 - CF and the logical addresses 10 and up with DTC 00 - FE.
Date/Time/* 10	The date and time stamped at the time of DTC occurrence are displayed in the order of year-month-day-hour-minute-second. (If the date and time data is invalid, it is displayed as a blank.)
LAN Check mode screen switch/* 11	Pressing this switch activates the LAN Check Mode screen, which displays the logical address 01 with DTC D0 - FE.
Current/*12	Up to 6 DTC codes detected during the System Check are displayed.
Memory/ *13	DTC memories stored and current DTC Notification are displayed.

HINT:

Detecting Unit DTC activates the Unit Check Mode on the screen.
Detecting no LAN DTC activates the LAN Check Mode on the screen.
Use the displayed switch to change to the Unit Check Mode and the LAN Check Mode.
The LAN Check Mode chooses and displays the LAN DTC out of DTC of components identified as "CHEK" in the Service Check.

Fig 10: Display LAN Check Mode
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 11: Display Unit Check Mode
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
In the Unit Check Mode, DTC which is identified as "EHCK" in the Service Check, is displayed as classified into Current DTC and Past DTC.

DISPLAY CHECK MODE

HINT:

Display Check Mode is operated as follows.

Fig 12: Display Check Mode Flow Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Display Check Mode

CONTENTS

Display	Contents
Color Bar Check/*1	Color display is checked.
Remote Commander/*2	Operating condition of remote commander display is checked.
Vehicle Signal Check/*3	Status of the vehicle signal which has been loaded into the display is checked.
MENU/*4	Pressing this switch activates the Diagnosis Menu screen.

HINT:

In Display Check Mode, above checks can be performed.

Fig 13: Display Check Mode

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Display Color Bar Check
1. Start the Diagnosis System.
2. Select "MENU".
3. Select "Display Check".
4. Select "Color Bar Check".
5. Make sure that each color name is corresponding to each color on the bar.
  HINT:
  
  Select Black, Red, Green, Blue, White and Stripe to display selected colors and stripe on the entire screen.
6. Compare with the Color Bar Check in the Navigation Check and make sure that no difference is found.
  
  Fig 14: Display Color Bar Check Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Display Touch Switch Check
1. Start the Diagnosis system.
2. Select "MENU".
3. Select "Display Check".
4. Select "Touch Switch Check".
5. Touch the screen and make sure that every line reacts to the touch.
  HINT:
  
  After the Touch Switch Check for vertical lines, press "Next" to check horizontal lines.
  
  Fig 15: Display Touch Switch Check Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Display Panel Switch Check
1. Start the Diagnosis system.
2. Select "MENU".
3. Select "Display Check".
4. Select "Remote Commander".
5. Press each switch and make sure that it corresponds to the display on the screen.
  
  Fig 16: Display Remote Commander Check
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Display Vehicle Signal Check
1. Start the Diagnosis system.
2. Select "MENU".
3. Select "Display Check".
4. Select "Vehicle Signal Check".
5. Check the status of the vehicle signal (Battery, IG, PKB, SPEED, TAIL, ADIM/TCAN) loaded into the display.
  HINT:
  
  Vehicle signal data is updated every 1 second.
  
  Fig 17: Display Vehicle Signal Check Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NAVIGATION CHECK MODE

HINT:

Navigation Check Mode is operated as follows.

Fig 18: Navigation Check Mode Flow Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Navigation Check Mode

DESCRIPTION

Display	Description
GPS Information/*1	Information related to GPS is displayed (updated every 1 second.).
Vehicle Sensors/*2	Vehicle signal information to be loaded in the Navigation ECU is displayed (updated every 1 second.).
Color Bar Check/*3	Color display of the Navigation ECU is checked. (Compare with the Color Bar Check results in the Display Check.)
Memory Copy / Paste/*4	Using hand-held tester, read and write user data such as a placement of shop, restaurant etc. stored in memory.
Parts Information/*5	Navigation program version and disc version are displayed.

HINT:

In the Navigation Check mode, the checks mentioned above can be conducted.
The Navigation ECU operates each Navigation Check screen.

Fig 19: Display Navigation Check Mode
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

GPS Information

Start the Diagnosis system.
Select "MENU".
Select "Navigation Check".
Select "GPS Information".

Check the GPS-related information.

DESCRIPTION

Display Data	Description
Satellite Informational	"Angle of elevation", "Azimuth", "Level of Signal" and "Status of Wave Reception" of the Satellite captured by the antenna are displayed (for 8 satellites max.)
Position Data/*2	The latitude and longitude of the current position are displayed in degree, minute and second.
Time Data/*3	Date and time data obtained from the GPS receiver is displayed.

Measurement Status: /*4

CONDITIONS

Display	Conditions
2D	Measurement on 2 dimensions
3D	Measurement on 3 dimensions
NG	GPS information cannot be used.
Error	Reception error occurs.
-	Other than the above

Fig 20: Display GPS Information Mode

Vehicle Sensors

Start the Diagnosis system.
Select "MENU".
Select "Navigation Check".
Select "Vehicle sensors".

Check the vehicle signals (ACC, REV, SPD) and the output signal of the gyro sensor introduced into the navigation ECU.

DISPLAY METHOD

Items	Display Method
ACC signal status	Displayed as ON/OFF.
REV signal status	Displayed as ON/OFF.
SPD signal status	The cumulative value of input pulse count and the vehicle speed [km/h] [mph] are displayed. [The cumulative value of input pulse count is set to be 0 when this screen is displayed. When the vehicle starts to drive, it is counted and displayed continually.]
Output signal of the gyro sensor	Voltage [V] and relative azimuthal angle [degree] are displayed. [The position of the vehicle when this screen is displayed is set to be 0 degree in azimuth. Based on this, relative azimuthal angle is measured and displayed continually.]

Fig 21: Display Vehicle Sensors Mode

Navigation Color Bar Check
1. Start the Diagnosis system.
2. Select "MENU".
3. Select "Navigation Check".
4. Select "Color Bar Check".
5. Make sure that the set color matches the display color.
6. Compare with the Color Bar Check in the Display Check and make sure that no difference is found.
  
  Fig 22: Display Navigation Color Bar Check Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Parts Information
1. Start the Diagnosis system.
2. Select "MENU".
3. Select "Navigation Check".
4. Select "Parts Information".
5. Check the program and disc version.
  
  Fig 23: Display Parts Information Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Memory/ Copy/ Paste
HINT:

This function is not available.

Fig 24: Display Memory/ Copy/ Paste Mode
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CELLULAR MOBILE PHONE

Characteristics of Cellular Mobile Phone

CAUSE

Phenomena	Cause
Unable to send and receive radio waves.	5. The vehicle is in a place with difficulty of receiving radio waves such as behind the buildings, in mountainous areas, tunnels and parking areas. (The out-of-range lamp lights.) 6. The vehicle is outside the service area with no radio zone. (The out-of-range lamp lights.) 7. Failed to install the antenna. (The out-of-range lamp lights.)
Unable only to send radio waves.	If a cellular mobile phone is set for dial lock.
Noise is heard when calling.	The vehicle has moved to a place with difficulty of receiving radio waves such as behind the buildings or inside the tunnels. The vehicle has moved across the border of radio zones. When the vehicle moves to another radio zone, the dial circuit needs to be changed. When the vehicle speed is 0 km/h, it automatically changes the dial circuit to prevent tapping, and a call can be disconnected for about 1 second in this moment. It can also be disconnected when no vacant channel is found in the radio zone where the vehicle has moved.
Strange noise is heard from receivers or speakers.	Optional equipment such as the radar tracer is being installed. It can make unusual sound when the magnetic wave from the optional equipment overlaps the dial circuit.

HINT:

*"Preparation for sending out radio waves" has the following process.

Picking up the receiver (turning on the phone switch) sends out the dial signal to the Radio Circuit Control Center.

The center chooses the radio base of the highest-sensitivity in receiving the dial signal.

It also makes a telecommunication circuit by choosing a vacant channel out of many.

This process is called "Preparation for Sending out Radio Waves".

Before troubleshooting, check the following points:
1. Troubles should be checked where the cellular mobile phone can receive enough radio wave.
2. Troubles occur even with different cellular mobile phones (even with different telephone companies, if possible).
3. Battery life of the cellular mobile phone and its recharge state must be in good condition.
4. The antenna of the cellular mobile phone should be stuck out.
5. Troubles occur even when the cellular mobile phone is formatted.
  HINT:
  - When it is formatted, the data and the registration of telephone numbers in the cellular mobile phone will be deleted.
  - The member ID and the password need to be reentered.