Lexus Navigation System: Diagnosis Lexus LS III

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

The ECU of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.

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1. USER TROUBLES UNDER NORMAL CONDITION OF THE NAVIGATION SYSTEM Voice guidance is not performed even though the system is in normal condition when: The destination is not set up. 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.) "Guidance in Other Modes" is not set up. (In this case no voice guidance is given except on the map screen.) 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.
2. 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.
3. WIRING DIAGRAM Navigation System Wiring Diagram Audio System Wiring Diagram Cellular Mobile Telephone System Wiring Diagram
4. DIAGNOSIS SYSTEM MODE HINT: Diagnosis System Mode is operated as follows (Scheme 11) Also, see step 8.
5. SERVICE CHECK MODE HINT: Service Check Mode is operated as follows (Scheme 12) Also, see step 8.
6. DISPLAY CHECK MODE HINT: Display Check Mode is operated as follows (Scheme 13) Also, see step 10.
7. NAVIGATION CHECK MODE HINT: Navigation Check Mode is operated as follows (Scheme 14) Also, see step 11.
8. 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. DISPLAY MODE 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. Diagnosis Start-Up by touch switch. Vehicle speed should be 0 km/h (0 MPH). Apply the parking brake. Turn the ignition switch to ACC or ON. Activate the screen adjustment screen. Alternately touch the upper and lower bottom parts of the left end of the screen 3 times. Finishing the Diagnosis System Turn the ignition switch off to finish the mode.
9. SERVICE CHECK MODE Service Check Start the Diagnosis System. DIAGNOSIS SYSTEM 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 and the LAN Check information that will be displayed on the next screens. Read Check Result SERVICE CHECK RESULT MEANING 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. "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. DISPLAY LAN CHECK DISPLAY ITEM AND 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 DO - 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. 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.
10. DISPLAY CHECK MODE DISPLAY CHECK MODE CONTENTS Display Contents Color Bar Check/*1 Color display is checked. Touch Switch Check/*2 Operating condition of touch switch display is checked. Panel Switch Check/*3 Operating condition of switches on both sides of the display is checked. Vehicle Signal Check/*4 Status of the vehicle signal which has been loaded into the display is checked. HINT: In Display Check Mode, above checks can be performed. Display Color Bar Check Start the Diagnosis System. Select "MENU". Select "Display Check". Select "Color Bar Check". 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. Compare with the Color Bar Check in the Navigation Check and make sure that no difference is found. Display Touch Switch Check Start the Diagnosis system. Select "MENU". Select "Display Check". Select "Touch Switch Check". 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. Display Panel Switch Check Start the Diagnosis system. Select "MENU". Select "Display Check". Select "Panel Switch Check". Press each switch and make sure that it corresponds to the display on the screen. PANEL SWITCH CHECK - DATA & DESCRIPTION Display Data Description Names of push-button switches/*1 Names of push-button switches pressed are displayed. Pressing 2 or more push-button switches is displayed as "MULTIPLE". After that if the number of push-button switches being pressed becomes 1, the name of the push-button switch being pressed is displayed. Disp MENU Pressing this switch activates Display Check Menu. Display Vehicle Signal Check Start the Diagnosis system. Select "MENU". Select "Display Check". Select "Vehicle Signal Check". Check the status of the vehicle signal (Battery, IG, PKB, SPEED, TAIL) loaded into the display. HINT: Vehicle signal data is updated every second.
11. NAVIGATION CHECK MODE NAVIGATION CHECK MODE - DISPLAY & 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.) Microphone Check/*4 Microphone is checked. HINT: In the Navigation Check mode, the checks mentioned above can be conducted. The Navigation ECU operates each Navigation Check screen. GPS Information Start the Diagnosis system. Select "MENU". Select "Navigation Check". Select "GPS Information". Check the GPS-related information. GPS INFORMATION - DATA & DESCRIPTION Display Data Description Satellite Information/*1 "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. GPS INFORMATION - MEASUREMENT STATUS: /*4 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 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. VEHICLE SENSORS & 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.] Navigation Color Bar Check Start the Diagnosis system. Select "MENU". Select "Navigation Check". Select "Color Bar Check". Make sure that the set color matches the display color. Compare with the Color Bar Check in the Display Check and make sure that no difference is found. Microphone Check HINT: Although this check screen is displayed, it cannot be operated. Start the Diagnosis system. Select "MENU". Select "Navigation Check". Select "Microphone Check". Check the PIT switch and the voice recognition. MICROPHONE CHECK MODE Items Description PTT switch/* 1 After making sure that the PTT switch is ON, it displays "OK" on the screen. Voice Recognition/*2 After making sure that the PTT switch is ON, it conducts the voice recognition check. When the equipment is ready for voice recognition, it makes beep sound. It waits for yes/no natural voice. Recognition Result/*3 After recognizing the voice, it highlights the yes/no bottom and displays "OK" on the screen. HINT: When a human voice cannot be recognized by the equipment for more than 7 seconds after it gets ready for voice recognition, it displays ERROR on the Voice Recognition section, and goes back to the state before pressing the PTT switch.
12. CELLULAR MOBILE PHONE Characteristics of Cellular Mobile Phone CELLULAR MOBILE PHONE CHARACTERISTICS 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: Troubles should be checked where the cellular mobile phone can receive enough radio wave. Troubles occur even with different cellular mobile phones (even with different telephone companies, if possible). Battery life of the cellular mobile phone and its recharge state must be in good condition. The antenna of the cellular mobile phone should be stuck out. 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.

DIAGNOSTIC TROUBLE CODE CHART

LEXUS NAVIGATION SYSTEM DIAGNOSTIC TROUBLE CODE CHART

1. MULTI DISPLAY (Physical address: 110) Logical address: 01 (Communication control) MULTI DISPLAY LOGICAL ADDRESS: 01 (COMMUNICATION CONTROL) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts 21 ROM Error Abnormal condition of ROM is detected. Replace multi-display assembly. 22 RAM Error Abnormal condition of RAM is detected. Replace multi-display assembly. D5 (1) Registered component disconnected Component shown by sub-code is or was disconnected from system with ignition switch in ACC or ON. Communication with component shown by sub-code is not ensured when engine is started. Check harness for power supply of component shown by sub-code. Check harness for communication system of component shown by sub-code. D8 (2) No response to connection check Component shown by sub-code is or was disconnected from system after engine is started. Check harness for power supply of component shown by sub-code. Check harness for communication system of component shown by sub-code. D9 (1) Last Mode Error Component operated (sound and/or image was provided) before engine stop is or was disconnected with ignition switch in ACC or ON. Check harness for power supply of component shown by sub-code. Check harness for communication system of component shown by sub-code. DA No Response to ON/OFF Instruction No response is identified when changing mode (audio and visual mode change). Detected when sound and picture does not change by button operation Check harness for power supply system of component shown by sub-code. Check harness for communication system of component shown by sub-code. If error occurs again, replace component shown by auxiliary code DB (1) Mode Status Error Dual alarm is detected. Check harness for power supply system of component shown by sub-code. Check harness for communication system of component shown by sub-code. DC (4) Transmission Error Transmission to component shown by sub-code has been failed. (This code does not necessarily mean actual failure.) If same sub-code is recorded in other component(s), check harness for power supply and communication system of all components shown by code. DE (3) Slave Reset (Momentary Interruption) After engine start, slave component has been disconnected. DB Check harness for power supply system of component shown by sub-code. Check harness for communication system of component shown by sub-code. E2 ON/OFF Instruction Parameter Error Error is detected in ON/OFF control command from multi-display assembly. Replace multi-display assembly. E3 (1) Registration Request Transmission Registration Request command is output from slave component. By reception of connection check instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine. (2) This code is stored when 180 sec. has passed after the power supply connector is pulled out after engine start. (3) This code may be stored when the engine key is turned again after engine start. (4) This code may be stored when the engine key is turned again 1 min. after engine start. Logical address: 21 (Switch) LOGICAL ADDRESS: 21 (SWITCH) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts 10 Panel Switch Error Error in panel switch input part is detected. (Error in switch control part, or internal communication error with switch control part is detected.) Inspect all switches on panel switch test screen in display check mode. If any of them does not function, replace multi-display assembly. If all switches function without problem, observe them for a while. 11 Touch Switch Error Error in touch switch sensor is detected. (Light level of LED is detected to be less than a fixed value.) Inspect all touch switches on touch switch test screen in display check mode. If any of lines does not react, replace multi-display assembly. If all of vertical and horizontal lines react normally, observe them for a while. Logical address: 34 (Front passenger monitor) LOGICAL ADDRESS: 34 (FRONT PASSENGER MONITOR) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts 10 Error in Picture Circuit Error in power supply system for picture circuit (abnormal voltage) is detected. Replace multi-display assembly. 11 Back-light Error (No current) Decline in power output from inverter circuit for back-light. Replace multi-display assembly. 12 Back-light Error (Excess current) Excess power output from inverter circuit for back-light. Replace multi-display assembly.
2. GATEWAY ECU (Physical address: 1C6) Logical address: 01 (Communication control) GATEWAY ECU LOGICAL ADDRESS: 01 (COMMUNICATION CONTROL) PROBLEM SYMPTOM DIAGNOSTIC CHART DTC Diagnosis item Condition Countermeasure and inspected parts D4 (1) Regular Communication Error Component in which this code is recorded has been disconnected after engine start. Or, when this code was recorded, multi-display was disconnected. Check harness for power supply system of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for power supply system of gateway ECU. Check harness for communication system of gateway ECU. (1) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
3. RADIO AND PLAYER (Physical address: 190) Logical address: 01 (Communication control) RADIO & PLAYER LOGICAL ADDRESS: 01 (COMMUNICATION CONTROL) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply system of multi-display Check harness for communication system of multi-display. Check harness for power supply system of radio and player. Check harness for communication system of radio and player. D8 (2) No Response to Connection Check Component shown by sub-code is or had been disconnected from system after engine is start. Check harness for power supply system of component shown by sub-code. Check harness for communication system of component shown by sub-code. D9 (1) Last Mode Error Component operated (sounds and/or images were provided) before engine stop is or has been disconnected with ignition switch in ACC or ON. Check harness for power supply system of component shown by sub-code. Check harness for communication system of component shown by sub-code. DA No Response to ON/OFF Instruction No response is identified when changing mode (audio and visual mode change). Detected when sound and picture does not change by button operation. Check harness for power supply system of component shown by sub-code. Check harness for communication system of component shown by sub-code. If error occurs again, replace component shown by sub-code. DB (1) Mode Status Error Dual alarm is detected. Check harness for power supply of component shown by sub-code. Check harness for communication system of component shown by sub-code. DC (3) Transmission Error Transmission to component shown by sub-code has been failed. (Detecting this DTC does not necessarily mean actual failure.) If same sub-code is recorded in order component, check harness for power supply and communication system of all components shown by code. DD (4) Master Reset (Momentary Interruption) After engine is started, multi-display assembly was disconnected from system. Check harness for power supply system of multi-display. Check harness for communication system of multi-display. Check harness for power supply system of radio and player. Check harness for communication system of radio and player. If this error occurs frequently, replace multi-display assembly. DE (4) Slave Reset (Momentary Interruption) After engine is started, slave component was disconnected from system. Check harness for power supply of component shown by sub-code. Check harness for communication system of component shown by sub-code. DF (5) Master Error Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for communication system between multi-display assembly and sub-master component. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E1 (1) Audio processor ON error While source equipment is operating, AMP output is stopped. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. E2 ON/OFF Instruction Parameter Error Error occurs in ON/OFF controlling command from multi-display assembly. Replace multi-display assembly. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Receiving Connection Check Instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E4 (1) Multiple Frame Abort Multiple frame transmission is aborted. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine. (2) This code is stored when 180 sec. has passed after the power supply connector is pulled out after engine start. (3) This code may be stored when the engine key is turned again 1 min. after engine start. (4) This code may be stored when the engine key is turned again after engine start. (5) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored. Logical address: 61 (Cassette tape player's switch) LOGICAL ADDRESS: 61 (CASSETTE TAPE PLAYER'S SWITCH) DIAGNOSTIC CHART DTC Diagnosis item Condition Countermeasure and inspected parts 40 Mechanical Error of Media Malfunction due to mechanical failure is identified. Or cassette tape is cut or entangled. Inspect cassette tape. Replace radio and player. Logical address: 63 (In-dash CD changer) LOGICAL ADDRESS: 63 (IN-DASH CD CHANGER) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts 42 No Disc Readout Disc cannot be read. Inspect CD. 44 CD Error Error is detected in CD player. Replace radio and player. 45 EJECT Error Disc cannot be ejected. Replace radio and player. 47 CD High Temp. High temperature is detected in CD changer. Replace radio and player. 48 CD Excess Current Excess current is applied to CD changer. Replace radio and player.
4. NAVIGATION ECU (Physical address: 178) HINT: Logical address: 01 (Communication control) NAVIGATION ECU LOGICAL ADDRESS: 01 (COMMUNICATION CONTROL) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply system of multi-display. Check harness for communication system of multi-display. Check harness for power supply system of navigation ECU. Check harness for communication system of navigation ECU. D7 (2) Connection Check Error Component in which this code is recorded has been disconnected from system after engine start. Or, when this code was recorded, multi-display assembly was disconnected. D6 Check harness for power supply system of multi-display. Check harness for communication system of multi-display. Check harness for power supply system of navigation ECU. Check harness for communication system of navigation ECU. DC (3) Transmission Error Transmission to component shown by sub-code has been failed. (This code does not necessarily mean actual failure.) If same sub-code is recorded in other component(s), check harness for power supply and communication system of all components shown by code. DD (4) Master Reset (Momentary Interruption) Component that is to be master has been disconnected after engine start. Check harness for power supply system of multi-display assembly. Check harness for communication system of multi-display assembly. If error occurs frequently, replace multi-display assembly. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering, it may be detected when no actual failure exists. E2 ON/OFF Instruction Parameter Error Error is detected in ON/OFF control command from multi-display assembly. Replace multi-display assembly. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Registration Request command is output from sub-master component. Since this DTC is provided for engineering, it may be detected when no actual failure exists. DF (4) Master Error Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for communication system between multi-display assembly and radio and player. E4 (1) Multiple Frame Abort Multiple frame transmission is aborted. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting the engine. (2) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored. (3) This code may be stored when the engine key is turned 1 min. again after engine start. (4) This code may be stored when the engine key is turned again after engine start. Logical address: 80 (Navigation ECU) LOGICAL ADDRESS: 80 (NAVIGATION ECU) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts 10 Gyro Error Error in gyro sensor is detected. (Abnormal value in voltage output from sensor is detected for more than specified time.) Replace navigation ECU. 42 Map Disc Error Data cannot be read for a certain time due to scratches or dirt on disc surface or insertion of wrong disc. Inspect disc and replace if necessary. (Visually check disc surface and wipe it with soft cloth.) 43 Vehicle Signal Error Input error of vehicle signal is detected. (When no vehicle signal has been input for a certain time.) Inspect wire harness. If wire harness is normal, replace navigation ECU. 44 Player Error Malfunction of player continues for a certain length of time. Check if disc can be inserted/taken out or not. If not, replace navigation ECU. If it can be inserted/taken out and this code is output, replace navigation ECU. Logical address: 80 (GPS receiver) LOGICAL ADDRESS: 80 (GPS RECEIVER) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts 11 GPS Receiver Error Operation error of GPS receiver is detected. At an outdoor site with a clear view, operate to display GPS data. If GPS mark is not properly displayed after 15 min. or more, replace navigation ECU. 40 GPS Antenna Error Open condition of GPS antenna is detected. (Open circuit, connection failure of connectors, etc.) Inspect antenna and replace if necessary. 41 Power Supply Error of GPS Antenna Abnormal voltage of GPS antenna cable or short circuit is detected. Inspect GPS antenna and replace if necessary. (When no continuity is identified between connector's core and sealed part, GPS antenna is normal.) If GPS antenna is normal, replace navigation ECU. 45 Player Temp. Too High Readout cannot be done because temperature around player's pickup (reading part) is too high. With ignition switch OFF, leave in cool shaded place for a while and recheck. If same code detected, replace navigation ECU.
5. STEREO COMPONENT AMPLIFIER (Physical address: 440) HINT: Logical address: 01 (Communication control) STEREO COMPONENT AMPLIFIER LOGICAL ADDRESS: 01 (COMMUNICATION CONTROL) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply of multi display. Check harness for communication system of multi display. Check harness for power supply of stereo component amplifier. Check harness for communication system of stereo component amplifier. D7 Communication Check Error Component in which this code is recorded is or was disconnected from system after engine start. Or, when recording this code, multi-display assembly was disconnected. Check harness for power supply of multi display. Check harness for communication system of multi display. Check harness for power supply of stereo component amplifier. Check harness for communication system of stereo component amplifier. DC (2) Transmission Error Transmission to component shown by sub-code has been failed. (Detecting this DTC does not necessarily mean actual failure.) If same sub-code is recorded in other component, check harness for power supply and communication system of all components shown by code. DD (3) Master Reset (Momentary Interruption) After engine start, multi-display assembly was disconnected from system. Check harness for power supply of multi display. Check harness for communication system of multi display. Check harness for power supply of stereo component amplifier. Check harness for communication system of stereo component amplifier. If this error occurs frequently, replace multi-display assembly. DF (4) Master Error Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for communication system between multi-display assembly and sub-master component. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E1 (1) Audio processor ON error While source equipment is operating, AMP output is stopped. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. E2 ON/OFF Instruction Parameter Error Error occurs in ON/OFF controlling command from multi-display assembly. Replace multi-display assembly. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Registration Connection Check Instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine. (2) This code may be stored when the engine key is turned again 1 min. after engine start. (3) This code may be stored when the engine key is turned again after engine start. (4) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
6. STEREO COMPONENT TURNER (Physical address: 1F0) HINT: Logical address: 01 (Communication control) STEREO COMPONENT TURNER LOGICAL ADDRESS: 01 (COMMUNICATION CONTROL) DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply of stereo component tuner. Check harness for communication system of stereo component tuner. Check harness for power supply system of multi display. Check harness for communication system multi display. D7 Communication Check Error Component in which this code is recorded is or was disconnected from system after engine start. Or, when recording this code, multi-display assembly was disconnected. Check harness for power supply of stereo component tuner. Check harness for communication system of stereo component tuner. Check harness for power supply system of multi display. Check harness for communication system multi display. DC (2) Transmission Error Transmission to component shown by sub-code has been failed. (Detecting this DTC does not necessarily mean actual failure.) If same sub-code is recorded in order component, check harness for power supply and communication system of all components shown by code. DD (3) Master Reset (Momentary Interruption) After engine start, multi-display assembly was disconnected from system. Check harness for power supply system of stereo component tuner. Check harness for communication system of stereo component tuner. Check harness for power supply system of multi display. Check harness for communication system multi display. If this error occurs frequently, replace multi-display assembly. DF (4) Master Error Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for communication system between multi-display assembly and radio and player. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E2 ON/OFF Instruction Parameter Error Error occurs in ON/OFF controlling command from radio and player. Replace multi display. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Receiving Connection Check Instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine. (2) This code may be stored when the engine key is turned again 1 min. after engine start. (3) This code may be stored when the engine key is turned again after engine start. (4) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
7. AUDIO AND REAR A/C CONTROL SWITCH (Physical address: 1C0) HINT: Logical address: 01 (Communication control) AUDIO & REAR A/C CONTROL SWITCH LOGICAL ADDRESS: 01 (COMMUNICATION CONTROL) PROBLEM SYMPTOM DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected Parts D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply system of multi-display. Check harness for communication system multi-display. Check harness for power supply system of audio and rear A/C control switch. Check harness for communication system audio and rear A/C control switch. D7 (2) Communication Check Error Component in which this code is recorded is or was disconnected from system after engine start. Or, when recording this code, multi-display assembly was disconnected. Check harness for power supply system of multi-display. Check harness for communication system of multi-display. Check harness for power supply system of audio and rear A/C control switch. Check harness for communication system audio and rear A/C control switch. DC (2) Transmission Error Transmission to component shown by sub-code has been failed. (Detecting this DTC does not necessarily mean actual failure.) If same sub-code is recorded in order component, check harness for power supply and communication system of all components shown by code. DD (3) Master Reset (Momentary Interruption) After engine start, multi-display assembly was disconnected from system. Check harness for power supply system of multi-display. Check harness for communication system multi-display. Check harness for power supply system of audio and rear A/C control switch. Check harness for communication system audio and rear A/C control switch. If this error occurs frequently, replace multi-display assembly. DF (4) Master Error Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for communication system between multi-display assembly and radio and player. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering, it may be detected when no actual failure exists. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Receiving Connection Check Instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E4 (1) Multiple Frame Abort Multiple frame transmission is aborted. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine. (2) This code may be stored when the engine key is turned again 1 min. after engine start. (3) This code may be stored when the engine key is turned again after engine start. (4) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
8. TELEPHONE ECU (Physical address: 17C) HINT: Logical address: 01 (Communication control) TELEPHONE ECU LOGICAL ADDRESS: 01 (COMMUNICATION CONTROL) PROBLEM SYMPTOM DIAGNOSTIC CHART DTC Diagnosis Item Condition Countermeasure & Inspected parts 21 ROM Error Abnormal condition of ROM is detected. Replace multi-display assembly. 22 RAM Error Abnormal condition of RAM is detected. Replace multi-display assembly. D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply of radio and player. Check harness for communication system of radio and player. Check harness for power supply of stereo component amplifier. Check harness for communication system of stereo component amplifier. D7 Communication Check Error Component in which this code is recorded is or was disconnected from system after engine start. Or, when recording this code, multi-display assembly was disconnected. Check harness for power supply of radio and player. Check harness for communication system of radio and player. Check harness for power supply of telephone transceiver and speaker relay. Check harness for communication system of telephone transceiver and speaker relay. DC (2) Transmission Error Transmission to component shown by sub-code has been failed. (Detecting this DTC does not necessarily mean actual failure.) If same sub-code is recorded in order component, check harness for power supply and communication system of all components shown by code. DD (3) Master Reset (Momentary Interruption) After engine start, multi-display assembly was disconnected from system. Check harness for power supply of radio and player. Check harness for communication system of radio and player. Check harness for power supply of telephone receiver and speaker relay. Check harness for communication system of telephone receiver and speaker relay. If this error occurs frequently, replace multi-display assembly. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E2 ON/OFF Instruction Parameter Error Error occurs in ON/OFF controlling command from multi-display assembly. Replace multi-display assembly. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Registration Connection Check Instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E4 (1) Multiple Frame Abort Multiple frame transmission is aborted. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine. (2) This code may be stored when the engine key is turned again 1 min. after engine start. (3) This code may be stored when the engine key is turned again after engine start. (4) When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.

Scheme 30

Scheme 31

1. NAVIGATION SYSTEM
2. CELLULAR MOBILE TELEPHONE SYSTEM

Scheme 32

Scheme 33

Scheme 34

Scheme 35

Scheme 36

Scheme 37

Scheme 38

Scheme 39

Scheme 40

Scheme 41

1. MULTI DISPLAY TERMINALS CONDITION & VOLTAGE Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) M3-1 - M3-6 (+B1 - GND1) R-G - W-B Constant 10 - 14V M3-2 - M3-6 (IG - GND1) LG-R - W-B Ignition switch OFF or ACC Below 1 V Ignition switch ON 10 - 14V M3-4 - M3-6 (ACC - GND1) GR - W-B Ignition switch OFF Below 1 V Ignition switch ACC or ON 10 - 14V M3-6 - Body ground (GND1 - Body ground) W-B - Body ground Constant Below 1 V M4-3 (TX+) G See "Service Check Mode"..... M4-5 - M3-6 (SPD - GND1) V-W - W-B See "Vehicle Signal Check Mode"..... M4-7 - M3-6 (PBEW - GND1) L-W-B Passenger seat belt buckle switch OFF (Belt unfastened) Below 1 V Passenger seat belt buckle switch ON (Belt fastened) 10 - 14V M4-10 (TX-) R See "Service Check Mode"..... M4-13 - M3-6 (PKB - GND1) LG - W-B See "Vehicle Signal Check Mode"..... M4-14 - M3-6 (TC - GND1) R-B - W-B Ignition switch OFF and connect terminals TC and CG of DLC3. Below 1 V M5-1 - M5-6 (VR - VG) Y- Shielded Ignition switch OFF Below 1 V M5-2 - M5-6 (R - VG) R - Shielded Navigation map is switched Pulse generation (2) M5-3 - M5-6 (B-VG) B- Shielded Navigation map is switched Pulse generation (2) M5-6 - M3-6 (VG - GND1) Shielded - W-B Ignition switch OFF Below 1 V M5-7 - M5-6 (G - VG) W - Shielded Navigation map is switched Pulse generation (2) M5-8 - M5-6 (SYNC - VGT) G - Shielded Navigation display is displayed Pulse generation (1) (1) (Scheme 33) (2) (Scheme 34)TERMINALS PROBLEM SYMPTOMS Terminal No. (Symbols) Problem symptom when open circuit is detected. Problem symptom when short circuit is detected. M3-1 - M3-6 (+B1 - GND1) Navigation system does not operate. Navigation system does not operate. M3-2 - M3-6 (IG - GND1) Navigation system does not operate. Navigation system does not operate. M3-4 - M3-6 (ACC - GND1) Navigation system does not operate. Navigation system does not operate. M3-6 - Body ground (GND1 - Body ground) Navigation system does not operate. Navigation system is normal. M4-3 (TX+) Screen is in disorder. Screen is in disorder. M4-5 - M3-6 (SPD - GND1) All switch operation is available during driving. All switch operation is available during driving. M4-7 - M3-6 (PBEW - GND1) Passenger seat belt warning does not light up. Passenger seat belt warning remains lit. M4-10 (TX-) Screen is in disorder. Screen is in disorder. M4-13 - M3-6 (PKB - GND1) The system can not enter diagnosis system mode. Navigation system is normal. M4-14 - M3-6 (TC - GND1) Navigation system is normal. The system can not exit service check mode. M5-1 - M5-6 (VR - VG) Screen noise or other types of noise occur. Screen noise or other types of noise occur. M5-2 - M5-6 (R - VG) Screen color turns to blue. Screen color turns to blue. M5-3 - M5-6 (B - VG) Screen color turns to yellow. Screen color turns to yellow. M5-6 - M3-6 (VG - GND1) Screen noise or other types of noise occur. Navigation system is normal. M5-7 - M5-6 (G - VG) Screen color turns to red-purple. Screen color turns to red-purple. M5-8 - M5-6 (SYNC - VG) Synchronous pulse fluctuates rapidly in map screen. Synchronous pulse fluctuates slowly in map screen.
2. NAVIGATION ECU TERMINALS CONDITION AND VOLTAGE Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) N4-1 - N4-17 (AUI+ - GND) P - W-B Audio system is sounding A waveform synchronized with sounds is output N4-2 (AUO+) P Sound quality test..... N4-3 - N4-17 (MIC+ - GND) Y - W-B Ignition switch OFF Below 1 V N4-5 - N4-17 (SPD - GND) Y-R - W-B See "Vehicle Signal Check Mode"..... N4-8 - N4-17 (MACC - GND) LG - W-B Ignition switch ACC 5V N4-9 - N4-17 (+B - GND) L-Y - W-B Constant 10 - 14V N4-10 - N4-17 (AUI - GND) V Audio system is sounding A waveform synchronized with sounds is output N4-11 (AUO-) V Sound quality test..... N4-12 - N4-17 (MIC - GND) BR - W-B Ignition switch OFF Below 1 V N4-14 (REV) L See "Vehicle Signal Check Mode"..... N4-15 - N4-17 (MUT2 - GND) G-R - W-B Navigation voice sounding Below 1 V N4-17 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V N4-18 - N4-17 (ACC-GND) GR - W-B Ignition switch OFF Below 1 V Ignition switch ACC or ON 10 - 14V N5-1 - N5-6 (VR - VG) Y- Shielded Ignition switch OFF Below 1 V N5-2 - N5-6 (R - VG) R - Shielded Navigation map is switched Pulse generation (2) N5-3 - N5-6 (B-VG) B - Shielded Navigation map is switched Pulse generation (2) N5-5 (TX+) L See "Service Check Mode"..... N5-6 - N4-17 (VG - GND) Shielded - W-B Ignition switch OFF Below 1 V N5-7 - N5-6 (G - VG) W - Shielded Navigation map is switched Pulse generation (2) N5-8 - N5-6 (SYNC - VG) G - Shielded Navigation display is displayed Pulse generation (1) N5-10 (TX-) LG See "Service Check Mode"..... (1) (Scheme 33)(2) (Scheme 34)TERMINALS PROBLEM SYMPTOMS Terminal No. (Symbols) Problem Symptom When Open Circuit Is Detected Problem Symptom When Short Circuit Is Detected N4-1 - N4-17 (AUI+ - GND) Driver side speaker does not sound. Driver side speaker does not sound. N4-2 (AUO+) Navigation voice does not sound. Navigation voice does not sound. N4-3 - N4-17 (MIC+ - GND) Voice from cellular phone cannot be heard. Voice cannot be recognized. Voice from cellular phone cannot be heard. Voice cannot be recognized. N4-5 - N4-17 (SPD - GND) Navigation operation is available during, or a cursor on present site does not move. Navigation operation is available during, or a cursor on present site does not move. N4-8 - N4-17 (MACC - GND) Voice from cellular phone cannot be heard. Voice cannot be recognized. Voice from cellular phone cannot be heard. Voice cannot be recognized. N4-9 - N4-17 (+B-GND) Map screen does not appear. Map screen does not appear. N4-10 - N4-17 (AUI - GND) Driver side speaker does not sound. Driver side speaker does not sound. N4-11 (AUO-) Navigation voice does not sound. Navigation voice does not sound. N4-12 - B4-17 (MIC - GND) Voice from cellular phone cannot be heard. Voice cannot be recognized. Voice from cellular phone cannot be heard. Voice cannot be recognized. N4-14 (REV) Moving direction of the vehicle is different from that of the cursor. Moving direction of the vehicle is different from that of the cursor. N4-15 - N4-17 (MUT2 - GND) Noise occurs when navigation phrase is changed. Speaker does not sound. N4-17 - Body ground (GND - Body ground) Audio system is normal. Audio system is normal. N4-18 - N4-17 (ACC - GND) Navigation system does not operate. Fuse is blown. N5-1 - N5-6 (VR - VG) Screen noise or other types of noise occur. Screen noise or other types of noise occur. N5-2 - N5-6 (R - VG) Screen color turns to blue. Screen color turns to blue. N5-3 - N5-6 (B - VG) Screen color turns to yellow. Screen color turns to yellow. N5-5 (TX+) Screen is in disorder. Screen is in disorder. N5-6 - N4-17 (VG - GND) Screen noise or other types of noise occur. Navigation system does not operate. N5-7 - N5-6 (G - VG) Screen color turns to red-purple Screen color turns to red-purple. N5-8 - N5-6 (SYNC - VG) Synchronous pulse fluctuates rapidly in map screen. Synchronous pulse fluctuates slowly in map screen. N5-10 (TX-)..........
3. RADIO AND PLAYER TERMINALS CONDITION & VOLTAGE Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) R3-2 (ATX+) G See "Service Check Mode"..... R3-3 (TXS+) G See "Service Check Mode"..... R3-5 (ATX-) R See "Service Check Mode"..... R3-6 (TXS-) R See "Service Check Mode"..... R2-1 - R2-20 (+B - GND) L-Y - BR Constant 10 - 14V R2-2 - R2-20 (ILL+ - GND) G - BR Light control switch TAIL or HEAD 10 - 14V R2-5 (TX+) G See "Service Check Mode" - R2-7 - R2-20 (MUTE - GND) Y-BR Radio switch ON Below 1 V R2-8 - R2-20 (R+ - GND) B-BR Audio system is sounding A waveform synchronized with sound is output R2-9 - R2-20 (L+ - GND) R-BR Audio system is sounding A waveform synchronized with sound is output R2-10 - Body ground (SGND - Body ground) Shielded - Body ground Constant Below 1 V R2-11 - R2-20 (ACC - GND) GR-BR Ignition switch OFF Below 1 V Ignition switch ACC or ON 10 - 14V R2-12 - R2-20 (ILL- - GND) W-G - BR Light control switch HI or FLASH. 0-5V R2-15 (TX-) R See "Service Check Mode" - R2-18 - R2-20 (R- - GND) W-BR Audio system is sounding A waveform synchronized with sound is output R2-19 - R2-20 (L - GND) G-BR Audio system is sounding A waveform synchronized with sound is output R2-20 - Body ground (GND - Body ground) BR - Body ground Constant Below 1 V TERMINALS PROBLEMS SYMPTOMS Terminal No. (Symbols) Problem Symptom When Open Circuit Is Detected Problem Symptom When Short Circuit Is Detected R3-2 (ATX+) Navigation system does not operate. Navigation system does not operate. R3-3 (TXS+) Navigation system does not operate. Navigation system does not operate. R3-5 (ATX-) Navigation system does not operate. Navigation system does not operate. R3-6 (TXS-) Navigation system does not operate. Navigation system does not operate. R2-1 - R2-20 (+B - GND) Radio and player does not operate. Fuse is blown. R2-2 - R2-20 (ILL+ - GND) Radio and player illumination does not light up. Fuse is blown. R2-5 (TX+) Navigation system does not operate. Navigation system does not operate. R2-7 - R2-20 (MUTE - GND) Pop sound etc. Speaker does not sound. R2-8 - R2-20 (R+ - GND) Sound from right side speaker is small. Sound from right side speaker is small. R2-9 - R2-20 (L+ - GND) Sound from left side speaker is small. Sound from left side speaker is small. R2-10 - Body ground (SGND - Body ground) Audio system is normal. Audio system is normal. R2-11 - R2-20 (ACC - GND) Navigation system does not operate. Fuse is blown. R2-12 - R2-20 (ILL- - GND) Light control rheostat does not operate. Light control rheostat does not operate. R2-15 (TX-) Navigation system does not operate. Navigation system does not operate. R2-18 - R2-20 (R - GND) Sound from right side speaker is small. Sound from right side speaker is small. R2-19 - R2-20 (L- - GND) Sound from left side speaker is small. Sound from left side speaker is small. R2-20 - Body ground (GND - Body ground) Navigation system does not operate. Navigation system does not operate.
4. STEREO COMPONENT AMPLIFIER TERMINALS CONDITION & VOLTAGE Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) S28-1 - S30-13 (MR+ - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output S28-2 - S30-13 (ML+ - GND) R - W-B Audio system is sounding A waveform synchronized with sound is output S28-4 - S30-13 (MMUT - GND) Y - W-B Radio switch ON Below 1 V S28-6 - S30-13 (MR- - GND) W - W-B Audio system is sounding A waveform synchronized with sound is output S28-7 - S30-13 (ML - GND) G - W-B Audio system is sounding A waveform synchronized with sound is output S28-9 (RTX-) LG See "Service Check Mode"..... S28-10 (RTX+) L See "Service Check Mode"..... S30-1 - S30-13 (FR+-GND) LG*1 - W-B G*2 Audio system is sounding A waveform synchronized with sound is output S30-2 - S30-13 (FL+ - GND) P - W-B Audio system is sounding A waveform synchronized with sound is output S30-3 - S30-13 (RR+ - GND) W - W-B Audio system is sounding A waveform synchronized with sound is output S30-4 - S30-13 (RL+ - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output S30-5 - S30-13 (WFR+ - GND) Y - W-B Audio system is sounding A waveform synchronized with sound is output S30-6 - S30-13 (WFL+ - GND) LG - W-B Audio system is sounding A waveform synchronized with sound is output S30-7 - S30-13 (+B-GND) L-R - W-B Constant 10 - 14V S30-8 - S30-13 (FR - GND) L*1 - W-B G-B*2 Audio system is sounding A waveform synchronized with sound is output S30-9 - S30-13 (FL- - GND) V - W-B Audio system is sounding A waveform synchronized with sound is output S30-10 - S30-13 (RR - GND) R - W-B Audio system is sounding A waveform synchronized with sound is output S30-11 - S30-13 (RL - GND) Y - W-B Audio system is sounding A waveform synchronized with sound is output S30-12 - Body ground (E - Body ground) W-B - Body ground Constant Below 1 V S30-13 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V S30-14 - S30-13 (WFR- - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output S30-15 - S30-13 (WFL- - GND) L - W-B Audio system is sounding A waveform synchronized with sound is output S30-16 - S30-13 (+B2 - GND) L-R - W-B Constant 10 - 14V S29-1 - S30-13 (FR+ - GND) G-W - W-B Audio system is sounding A waveform synchronized with sound is output S29-2 - S30-13 (FL+ - GND) V - W-B Audio system is sounding A waveform synchronized with sound is output S29-3 - S30-13 (TMUT - GND) LG-R - W-B Cellular mobile telephone is being used Below 1 V S29-4 (TX+) L See "Service Check Mode"..... S29-5 (MTX+) G See "Service Check Mode"..... S29-9 - S30-13 (N-MU - GND) G-R - W-B Navigation voice sounding Below 1 V S29-11 - S30-13 (R+ - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output S29-12 - S30-13 (L+ - GND) R - W-B Audio system is sounding A waveform synchronized with sound is output S29-13 - S30-13 (SPD - GND) V-W - W-B See "Vehicle Signal Check Mode"..... S29-14 - S30-13 (FR - GND) BR - W-B Audio system is sounding A waveform synchronized with sound is output S29-15 - S30-13 (FL- - GND) P-W-B Audio system is sounding A waveform synchronized with sound is output S29-17 (TX-) LG See "Service Check Mode"..... S29-18 (MTX-) R See "Service Check Mode"..... S29-20 - S30-13 (ACC - GND) GR - W-B Ignition switch OFF Below 1 V Ignition switch ACC or ON 10 - 14V S29-21 - S30-13 (MUTE - GND) Y - W-B Radio switch ON Below 1 V S29-23 - S30-13 (R - GND) W - W-B Audio system is sounding A waveform synchronized with sound is output S29-24 - S30-13 (L- - GND) G - W-B Audio system is sounding A waveform synchronized with sound is output S29-25 - S30-13 (SPDO - GND) Y-R - W-B See "Vehicle Signal Check Mode"..... TERMINALS PROBLEM SYMPTOMS Terminal No. (Symbols) Problem system when open circuit is detected. Problem symptom when short circuit is detected. S28-1 - S30-13 (MR+ - GND) Sound from right side speaker is small. Sound from right side speaker is small. S28-2 - S30-13 (ML+ - GND) Sound from left side speaker is small. Sound from left side speaker is small. S28-4 - S30-13 (MMUT - GND) Pop sound etc. Pop sound etc. S28-6 - S30-13 (MR- - GND) Sound from right side speaker is small. Sound from right side speaker is small. S28-7 - S30-13 (ML - GND) Sound from left side speaker is small. Sound from left side speaker is small. S28-9 (RTX-) Navigation system does not operate. Navigation system does not operate. S28-10 (RTX+) Navigation system does not operate. Navigation system does not operate. S30-1 - S30-13 (FR+ - GND) Front right side speaker does not sound. Front right side speaker does not sound. S30-2 - S30-13 (FL+ - GND) Front left side speaker does not sound. Front left side speaker does not sound. S30-3 - S30-13 (RR+ - GND) Rear right side speaker does not sound. Rear right side speaker does not sound. S30-4 - S30-13 (RL+ - GND) Rear left side speaker does not sound. Rear left side speaker does not sound. S30-5 - S30-13 (WFR+ - GND) Woofer does not sound. Woofer does not sound. S30-6 - S30-13 (WFL+ - GND) Woofer does not sound. Woofer does not sound. S30-7 - S30-13 (+B - GND) If terminal 1 6 is disconnected, system does not function. Fuse is blown. S30-8 - S30-13 (FR - GND) Front right side speaker does not sound. Front right side speaker does not sound. S30-9 - S30-13 (FL- - GND) Front left side speaker does not sound. Front left side speaker does not sound. S30-10 - S30-13 (RR- - GND) Rear right side speaker does not sound. Rear right side speaker does not sound. S30-11 - S30-13 (RL - GND) Rear left side speaker does not sound. Rear left side speaker does not sound. S30-12 - Body ground (E - Body ground) If terminal 13 is disconnected, system does not function. If terminal 13 is disconnected, system does not function. S30-13 - Body ground (GND - Body ground) If terminal 12 is disconnected, system does not function. If terminal 12 is disconnected, system does not function. S30-14 - S30-13 (WFR- - GND) Woofer does not sound. Woofer does not sound. S30-15 - S30-13 (WFL- - GND) Woofer does not sound. Woofer does not sound. S30-16 - S30-13 (+B2 - GND) If terminal 7 is disconnected, system does not function. Fuse is blown. S29-1 - S30-13 (FR+ - GND) Right side tweeter speaker does not sound. Right side tweeter speaker is small. S29-2 - S30-13 (FL+ - GND) Left side tweeter speaker does not sound. Left side tweeter speaker is small. S29-3 - S30-13 (TMUT - GND) Mute cannot be activated during telephone call. Speaker does not sound. S29-4 (TX+) Navigation system does not operate. Navigation system does not operate. S29-5 (MTX+) Navigation system does not operate. Navigation system does not operate. S29-9 - S30-13 (N-MU - GND) Pop sound etc. Speaker does not sound. S29-11 - S30-13 (R+ - GND) Sound from right side speaker is small. Sound from right side speaker is small. S29-12 - S30-13 (L+ - GND) Sound from left side speaker is small. Sound from left side speaker is small. S29-13 - S30-13 (SPD - GND) All switch operation is available during driving. All switch operation is available during driving. S29-14 - S30-13 (FR - GND) Right side tweeter speaker does not sound. Right side tweeter speaker is small. S29-15 - S30-13 (FL- - GND) Left side tweeter speaker does not sound. Left side tweeter speaker is small. S29-17 (TX-) Navigation system does not operate. Navigation system does not operate. S29-18 (MTX-) Navigation system does not operate. Navigation system does not operate. S29-20 - S30-13 (ACC - GND) Navigation system does not operate. Fuse is blown. S29-21 - S30-13 (MUTE - GND) Pop sound etc. Audio system does not sound. S29-23 - S30-13 (R- - GND) Sound from right side speaker is small. Sound from right side speaker is small. S29-24 - S30-13 (L- - GND) Sound from left side speaker is small. Sound from left side speaker is small. S29-25 - S30-13 (SPDO - GND) All switch operation is available during driving. Navigation operation is available during, or a cursor on present site does not move.
5. STEREO COMPONENT TUNER TERMINALS CONDITION AND VOLTAGE Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) S31-1 - S31-25 (B - GND) L-Y - W-B Constant 10 - 14V S31-2 - S31-25 (SG - GND) Shielded - W-B Constant Below 1 V S31-3 - S31-25 (R+ - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output S31-4 - S31-25 (L+ - GND) R - W-B Audio system is sounding A waveform synchronized with sound is output S31-8 (ATX+) L See "Service check Mode" - S31-9 (TXS+) G See "Service check Mode" - S31-11 - S31-25 (MUTE - GND) Y - W-B Radio switch ON Below 1 V S31-14 - S31-25 (ACC - GND) GR - W-B Ignition switch OFF Below 1 V Ignition switch ACC or OFF 10 - 14V S31-16 - S31-25 (R - GND) W - W-B Audio system is sounding A waveform synchronized with sound is output S31-17 - S31-25 (L- - GND) G - W-B Audio system is sounding A waveform synchronized with sound is output S31-20 (ATX-) LG See "Service check Mode" - S31-21 (TXS-) R See "Service check Mode" - S31-25 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V TERMINALS PROBLEM SYMPTOMS Terminal No. (symbols) Problem symptom when open circuit is detected. Problem symptom when short circuit is detected. S31-1 - S31-25 (B - GND) Navigation system does not operate. Fuse is blown. S31-2 - S31-25 (SG - GND) Audio system is normal. Audio system is normal. S31-3 - S31-25 (R+ - GND) Sound from right side speaker is small. Sound from right side speaker is small. S31-4 - S31-25 (L+ - GND) Sound from left side speaker is small. Sound from left side speaker is small. S31-8 (ATX+) Navigation system does not operate. Navigation system does not operate. S31-9 (TXS+) Navigation system does not operate. Navigation system does not operate. S31-11 - S31-25 (MUTE - GND) Pop sound, etc. Speaker does not sound. S31-14 - S31-25 (ACC - GND) Navigation system does not operate. Fuse is blown. S31-16 - S31-25 (R - GND) Sound from right side speaker is small. Sound from right side speaker is small. S31-17 - S31-25 (L- - GND) Sound from left side speaker is small. Sound from left side speaker is small. S31-20 (ATX-) Navigation system does not operate. Navigation system does not operate. S31-21 (TXS-) Navigation system does not operate. Navigation system does not operate. S31-25 - Body ground (GND - Body ground) Navigation system does not operate.
6. AUDIO AND REAR A/C CONTROL SWITCH TERMINALS CONDITION AND VOLTAGE Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) (1) 35-5 - A35-10 (2) A35-12 - A35-8 (+B - GND) L-W - W-B Constant 10 - 14V (1) A35-1, (2) A35-17 (TX+) G See "Service Check Mode" - (1) A35-10 - Body ground (2) A35-8 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V (1) A35-9 - A35-10 (2) A35-3 - A35-8 (ACC - GND) GR - W-B Ignition switch OFF Below 1 V Ignition switch ACC or ON 10 - 14V (2) A35-13 - A35-8 (LP+ - GND) G - W-B Light control switch OFF Below 1 V Light control switch TAIL or HEAD 10 - 14V (2) A35-7 - A35-8 (ILL- - GND) W-B - W-B Rear center arm-rest is opening (rear center arm-rest courtesy switch ON) Below 1 V (1) A35-6, (2) 35-18 (TX-) R See "Service Check Mode" - (1) w/ Rear Power Seat (2) w/o Rear Power Seat TERMINALS PROBLEM SYMPTOMS Terminal No. (Symbols) Problem symptom when open circuit is detected. Problem symptom when short circuit is detected. (1) A35-5 - A35-10 (2) 35-12 - A35-8 (+B - GND) Navigation system does not operate. Fuse is blown. (1) 35-1, (2) A35-17 (TX+) Navigation system does not operate. Navigation system does not operate. (1) 35-10 - Body ground (2) A35-8 - Body ground (GND - Body ground) Navigation system does not operate...... (1) 35-9 - A35-10 (2) 35-3 - A35-8 (ACC - GND) Navigation system does not operate. Fuse is blown. (2) 35-13 - A35-8 (LP+ - GND) Audio and rear A/C control switch illumination does not light up. Audio and rear A/C control switch illumination does not light up. (2) 35-7 - A35-8 (ILL- - GND) Audio and rear A/C control does not displayed. Audio and rear A/C control display is normal. (1) 35-6, (2) 35-18 (TX-) Navigation system does not operate. Navigation system does not operate. (1) w/ Rear Power Seat (2) w/o Rear Power Seat
7. TELEPHONE TRANSCEIVER AND SPEAKER RELAY TERMINALS CONDITION AND VOLTAGE Terminals No Symbols Condition STD Voltage (V) AA1 - AA24 SPI+ - GND Audio system is sounding A waveform synchronized with sounds is output AA2 - AA24 SPO+ - GND Audio system is sounding A waveform synchronized with sounds is output AA3 - AA24 TLSW - GND Steering pad switch is not operating 5V "3" switch is pushed 3.8V "2" switch is pushed 2.5V "1" switch is pushed 1.2V "TEL" switch is pushed 0V AA4 - AA24 TELI - GND Ignition switch ACC Below 1 V AA5 - AA24 MACC - GND Ignition switch ACC 5V AA6 - AA24 MICN - GND Ignition switch ACC 5V AA7 TX+ See "Service Check Mode"..... AA8 - AA21 SYNC - VG Cellular phone display is displayed Pulse generation *1 AA9 - AA21 R-VG Cellular phone display is displayed Pulse generation *2 AA10 - AA21 VR-VG Ignition switch OFF or ACC Below 1 V AA1 2 - AA24 IG - GND1 Ignition switch OFF or ACC Below 1 V Ignition switch ON 10 - 14V AA13 - AA24 +B - GND Constant 10 - 14V AA14 - AA24 SPI- - GND Audio system is sounding A waveform synchronized with sounds is output AA15 - AA24 SPO - GND During voice guidance of cellular phone A waveform synchronized with sounds is output AA16 - AA24 SW- - GND Ignition switch OFF Below 1 V AA17 - AA24 CNRL - GND LEXUS link system is operating Below 1 V AA18 - AA24 MUTE - GND While communicating over cellular phone Below 1 V AA19 - Body ground MIGND- Body ground Constant Below 1 V AA20 TX- See "Service Check Mode"..... AA21 - AA24 VG - GND Ignition switch OFF Below 1 V AA22 - AA21 G - VG Cellular phone display is displayed Pulse generation *2 AA23 - AA21 B - VG Cellular phone display is displayed Pulse generation *2 AA24 - Body ground GND1 - Body ground Constant Below 1 V AA25 - AA24 ACC- - GND Ignition switch OFF Below 1 V BB1 TX1 + See "Service Check Mode"..... BB5 - BB16 R1 - VG1 Navigation map display is displayed Pulse generation *2 BB6 - BB16 G1 - VG1 Navigation map display is displayed Pulse generation *2 BB7 - BB16 B1 - VG1 Navigation map display is displayed Pulse generation *2 BB8 - BB16 VR1 - VG1 Ignition switch OFF Below 1 V BB9 TX1- See "Service Check Mode"..... B15 - BB16 SYNC1 - VG1 Navigation map display is displayed Pulse generation *1 BB16 - AA24 VG1 - GND Ignition switch OFF Below 1 V CC1 - AA24 PCMCLK - GND While communicating over cellular phone Pulse generation (3 V) CC2 - AA24 PCMRA - GND While communicating over cellular phone Pulse generation (3 V) CCS - AA24 ASYNCTXD - GND Cellular phone display is displayed Pulse generation (3 V) CC4 - AA24 ASYNCRXD - GND Cellular phone display is displayed Pulse generation (3 V) CCS - AA24 CALL- - GND While communicating over cellular phone Below 1 V CC6 - AA24 PCMSYNC - GND While communicating over cellular phone Pulse generation (3 V) CC10 - AA24 VBATX - GND Cellular phone display is displayed 2 V or more CC11 - AA24 VCHG - GND Ignition switch OFF Below 1 V CC12 - Body ground GND - Body ground Constant Below 1 V CC1 3 - Body ground GND - Body ground Constant Below 1 V CC1 4 - Body ground GND - Body ground Constant Below 1 V CC18 - AA24 PCMTA - GND While communicating over cellular phone Pulse generation (3 V) CC19 - AA24 S - GND Cellular phone display is displayed Pulse generation *2 CC20 - AA24 IDVAL - GND Ignition switch OFF 18.2 kohm CC21 - AA24 S+ - GND Cellular phone display is displayed 5V TERMINALS PROBLEM SYMPTOMS Terminal No. (Symbols) Problem symptom when open circuit is detected. Problem symptom when short circuit is detected. AA1 - AA24 (SPI+ - GND) Sound from rear left side speaker is small. Sound from rear left side speaker is small. AA2 - AA24 (SPO+ - GND) Sound from rear left side speaker is small. Sound from rear left side speaker is small. AA3 - AA24 (TLSW - GND) Steering pad switch can not operate. Steering pad switch can not operate. AA4 - AA24 (TELI - GND) Even when voice is recognized or registered, air conditioner blower is on. Air conditioning blower is constantly operating. AA5 - AA24 (MACC - GND) No voice can be heard from cellular phone and voice recognition cannot be done. No voice can be heard from cellular phone and voice recognition cannot be done. AA6 - AA24 (MICIN - GND) No voice can be heard from cellular phone and voice recognition cannot be done. No voice can be heard from cellular phone and voice recognition cannot be done. AA7 (TX+) Cellular phone screen is disorder and navigation system does not operate. Cellular phone screen is disorder and navigation system does not operate. AA8 - AA21 (SYNC - VG) Synchronous pulse fluctuates rapidly in map screen. Synchronous pulse fluctuates rapidly in map screen. AA9 - AA21 (R-VG) Screen color turns to blue. Screen color turns to blue. AA10 - AA21 (VR-VG) Navigation system is normal. Navigation system is normal. AA12 - AA24 (IG - GND1) Navigation operation is available during, or a cursor on present site does not move. Navigation operation is available during, or a cursor on present site does not move. AA13 - AA24 (+B - GND) Cellular phone does not operate. Fuse is blown. AA14 - AA24 (SPI - GND) Sound from rear left side speaker is small. Sound from rear left side speaker is small. AA15 - AA24 (SPO- - GND) Sound from rear left side speaker is small. Sound from rear left side speaker is small. AA16 - AA24 (SW - GND) Steering pad switch illumination does not light up and switch can not be operation. Steering pad switch illumination does not light up and switch can not be operation. AA17 - AA24 (CNRL - GND) Activation of LEXUS link system cannot be detected. Activation of LEXUS link system cannot be detected. AA18 - AA24 (MUTE - GND) Audio system sounds during communication over cellular phone. Audio system does not sound. AA1 9 - Body ground (MIGND- Body ground) No voice can be heard from cellular phone and voice recognition cannot be done. No voice can be heard from cellular phone and voice recognition cannot be done. AA20 (TX-) Cellular phone screen is disorder and navigation system does not operate. Cellular phone screen is disorder and navigation system does not operate. AA21 - AA24 (VG - GND) Navigation system is normal. Navigation system is normal. AA22 - AA21 (G-VG) Screen color turns to red-purple. Screen color turns to red-purple. AA23 - AA21 (B-VG) Screen color turns to yellow. Screen color turns to yellow. AA24 - Body ground (GND1 - Body ground) Cellular phone does not operate or operates abnormally. (Noise occurs during communication over cellular phone, noise appears on cellular phone screen, eye.) Cellular phone does not operate or operates abnormally. (Noise occurs during communication over cellular phone, noise appears on cellular phone screen, eye.) AA25 - AA24 (ACC - GND) Cellular phone does not operate. Cellular phone does not operate. BB1 (TX1+) Cellular phone screen is disorder and navigation system does not operate. Cellular phone screen is disorder and navigation system does not operate. BB5-BB16 (R1-VG1) Screen color turns to red-purple. Screen color turns to red-purple. BB6-BB16 (G1 -VG1) Screen color turns to red-purple. Screen color turns to red-purple. BB7-BB16 (B1 -VG1) Screen color turns to yellow. Screen color turns to yellow. BB8-BB16 (VR1-VG1) Navigation system is normal. Navigation system is normal. BB9 (TX1-) Cellular phone screen is disorder and navigation system does not operate. Cellular phone screen is disorder and navigation system does not operate. B15 - BB16 (SYNC1 -VG1) Synchronous pulse fluctuates rapidly in map screen. Synchronous pulse fluctuates slowly in map screen. BB16 - AA24 (VG1 - GND) Navigation system is normal. Navigation system is normal. CC1 - AA24 (PCMCLK - GND) No voice can be heard from cellular phone. No voice can be heard from cellular phone. CC2 - AA24 (PCMRA - GND) No voice can be heard from cellular phone. No voice can be heard from cellular phone. CC3 - AA24 (ASYNCTXD - GND) Communication between cellular phone and telephone transceiver & speaker relay is impossible. Communication between cellular phone and telephone transceiver & speaker relay is impossible. CC4 - AA24 (ASYNCRXD - GND) Communication between cellular phone and telephone transceiver & speaker relay is impossible. Communication between cellular phone and telephone transceiver & speaker relay is impossible. CCS - AA24 (CALL-GN) Cellular phone does not operate. Cellular phone does not operate. CC6 - AA24 (PCMSYNC - GND) Cellular phone does not operate. Cellular phone does not operate. CC10 - AA24 (VBATX - GND) Connection of cellular phone cannot be detected. Connection of cellular phone cannot be detected. CC11 - AA24 (VCHG - GND) Recharge and power supply to cellular phone cannot be done. Recharge and power supply to cellular phone cannot be done. CC1 2 - Body ground (GND - Body ground) Noise occurs during communication over cellular phone. Noise occurs during communication over cellular phone. CC1 3 - Body ground (GND - Body ground) Noise occurs during communication over cellular phone. Noise occurs during communication over cellular phone. CC1 4 - Body ground (GND - Body ground) Noise occurs during communication over cellular phone. Noise occurs during communication over cellular phone. CC18 - AA24 (PCMTA - GND) No voice can be heard from cellular phone. No voice can be heard from cellular phone. CC19 - AA24 (S - GND) Recharge and power supply to cellular phone cannot be done. Recharge and power supply to cellular phone cannot be done. CC20 - AA24 (IDVAL - GND) Connection of cellular phone cannot be detected. Connection of cellular phone cannot be detected. CC21 - AA24 (S+ - GND) Recharge and power supply to cellular phone cannot be done. Recharge and power supply to cellular phone cannot be done.
8. CELLULAR MOBILE TELEPHONE SYSTEM WIRING DIAGRAM

PROBLEM SYMPTOMS TABLE

LEXUS NAVIGATION SYSTEM PROBLEM SYMPTOMS

INSPECTION PROCEDURE

1. Check RADIO NO. 1, P-ACC and P-IG fuse. NG: Replace fuse. OK: Go to next step.
2. Check multi display. PREPARATION: Disconnect the multi display connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Replace multi display.

1. Check stereo component amplifier. PREPARATION: Disconnect the stereo component amplifier connector. CHECK: Check the voltage of terminals +B. OK: +B: 10 - 14V CHECK: Check voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
2. Service check mode. (Stereo component amplifier, see «PRE-CHECK»(ref-198069-S22018083862005101400000) . CHECK: Go to step 4 . OK: Go to next step.
3. Check stereo component amplifier. CHECK: Check the voltage of terminals MUTE, N-MUTE and TMUT. OK: MUTE, N-MUTE, TMUT: See "Stereo component amplifier" of "TERMINAL OF ECU" NG: Replace or repair wire harness or connector. OK: Replace stereo component amplifier.
4. Check "AVC-LAN communication circuit", see «AVC-LAN (COMMUNICATION BUS) CIRCUIT»(ref-198069-S33118440802005101400000) . CHECK: Check continuity of the wire harness between the stereo component amplifier and the radio and player. OK: Continuity NG: Replace or repair AVC-LAN circuit. OK: Replace stereo component amplifier.

1. Service check mode (Navigation ECU), see «PRE-CHECK»(ref-198069-S22018083862005101400000) . CHECK: Troubleshoot for each diagnosis. OK: Replace multi display. NCON
2. Check navigation ECU. PREPARATION: Disconnect the navigation ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness. OK: Go to next step.
3. Check navigation ECU. CHECK: Check terminal R, G and B. OK: R, G, B: See "Navigation ECU" of "TERMINAL OF ECU". NG: Replace navigation ECU. OK: Go to next step.
4. Check multi display. PREPARATION: Disconnect the multi display connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity CHECK: Check terminal R, G and B. OK: R, G, B: See "multi display" of "TERMINAL OF ECU" NG: Replace or repair wire harness or connector. OK: Go to next step.
5. Check "AVC-LAN communication circuit", see «AVC-LAN (COMMUNICATION BUS) CIRCUIT»(ref-198069-S33118440802005101400000) . CHECK: Check continuity of the wire harness between the multi display and the navigation ECU. OK: Continuity NG: Replace or repair AVC-LAN circuit. OK: Replace multi display.

Replace multi display.

1. Service check mode. Radio and player, stereo component tuner, see «PRE-CHECK»(ref-198069-S22018083862005101400000) . NG: Troubleshoot for each diagnosis. OK: Go to next step.
2. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness. OK: Go to next step.
3. Check "AVC-LAN communication circuit", see «AVC-LAN (COMMUNICATION BUS) CIRCUIT»(ref-198069-S33118440802005101400000) . CHECK: Check continuity of the wire harness between the stereo component amplifier and the radio and player. Check continuity of the wire harness between the multi display and the radio and player. OK: Continuity NG: Replace or repair AVC-LAN circuit. OK: Replace multi display.

1. Check multi display. CHECK: Turn the light control switch to TAIL and check the voltage of terminal TAIL. OK: 10 - 14V NG: Check light control switch. OK: Go to next step.
2. Check multi display. PREPARATION: Disconnect the multi display connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Replace multi display.

1. Check navigation ECU. PREPARATION: Disconnect the navigation ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
2. Check wire harness between navigation ECU and multi display. PREPARATION: Disconnect the navigation ECU and multi display connectors. CHECK: Check continuity of the wire harness between terminal SYNC of the navigation ECU and terminal SYNC of the multi display. Check continuity of the wire harness between terminal VR of the navigation ECU and terminal VR of the multi display. Check continuity of the wire harness between terminal VG of the navigation ECU and terminal VG of the multi display. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
3. Check navigation ECU. CHECK: Check the voltage of terminal SYNC, VR and VG. OK: SYNC, VR, VG: See "Navigation ECU" of "TERMINAL OF ECU" NG: Replace navigation ECU. OK: Replace multi display.

1. Display check mode (Display color bar check), see «PRE-CHECK»(ref-198069-S22018083862005101400000) . NG: Replace multi display. OK: Go to next step.
2. Navigation check mode (Navigation color bar check), see «PRE-CHECK»(ref-198069-S22018083862005101400000) . NG: Replace multi display. OK: Go to next step
3. Setting check. (Is it set to Day Mode in screen adjustment?) See «PRE-CHECK»(ref-198069-S22018083862005101400000) Yes: Normal. NO: Go to next step.
4. Check navigation ECU. PREPARATION: Disconnect the navigation ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
5. Check the wire harness between navigation ECU and multi display. PREPARATION: Disconnect the navigation ECU and multi display connectors. CHECK: Check continuity of the wire harness between terminal R of the navigation ECU and terminal R of the multi display. Check continuity of the wire harness between terminal G of the navigation ECU and terminal G of the multi display. Check continuity of the wire harness between terminal B of the navigation ECU and terminal B of the multi display. Check continuity of the wire harness between terminal VR of the navigation ECU and terminal VR of the multi display. Check continuity of the wire harness between terminal VG of the navigation ECU and terminal VG of the multi display. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step
6. Check navigation ECU. CHECK: Check the voltage of terminal R, G, B, VR and VG. OK: SYNC, VR, VG: See "Navigation ECU" of "TERMINAL OF ECU" NG: Replace navigation ECU. OK: Replace multi display.

1. Check navigation ECU. PREPARATION: Disconnect the navigation ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step
2. Check wire harness between navigation ECU and multi display. PREPARATION: Disconnect the navigation ECU and multi display connectors. CHECK: Check continuity of the wire harness between terminal R of the navigation ECU and terminal R of the multi display. Check continuity of the wire harness between terminal G of the navigation ECU and terminal G of the multi display. Check continuity of the wire harness between terminal B of the navigation ECU and terminal B of the multi display. Check continuity of the wire harness between terminal VR of the navigation ECU and terminal VR of the multi display. Check continuity of the wire harness between terminal VG of the navigation ECU and terminal VG of the multi display. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
3. Check navigation ECU. CHECK: Check the voltage of terminal R, G, B, VR and VG. OK: SYNC, VR, VG: See "Navigation ECU" of "TERMINAL OF ECU" NG: Replace navigation ECU. OK: Replace multi display.

1. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
2. Check stereo component tuner. PREPARATION: Disconnect the stereo component tuner connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
3. Check wire harness between radio and player and stereo component amplifier. PREPARATION: Disconnect the radio and player and stereo component amplifier connectors. CHECK: Check continuity of the wire harness between terminal R+ of the radio and player and terminal R+ of the stereo component amplifier. Check continuity of the wire harness between terminal R- of the radio and player and terminal R- of the stereo component amplifier. Check continuity of the wire harness between terminal L+ of the radio and player and terminal L+ of the stereo component amplifier. Check continuity of the wire harness between terminal L- of the radio and player and terminal L- of the stereo component amplifier. OK: Continuity NG: Replace radio and player. OK: Go to next step.
4. Check the wire harness between stereo component tuner and stereo component amplifier. PREPARATION: Disconnect the stereo component tuner and stereo component amplifier connectors. CHECK: Check continuity of the wire harness between terminal R+ of the stereo component tuner and terminal MR+ of the stereo component amplifier. Check continuity of the wire harness between terminal R- of the stereo component tuner and terminal MR- of the stereo component amplifier. Check continuity of the wire harness between terminal L+ of the stereo component tuner and terminal ML+ of the stereo component amplifier. Check continuity of the wire harness between terminal L- of the stereo component tuner and terminal ML- of the stereo component amplifier. OK: Continuity NG: Replace stereo component tuner. OK: Replace stereo component amplifier.

1. Service check mode, see «PRE-CHECK»(ref-198069-S22018083862005101400000) . NG: Troubleshoot for each diagnosis. OK: Go to next step.
2. Check wire harness between navigation ECU and stereo component amplifier. PREPARATION: Disconnect the navigation ECU and stereo component amplifier connectors. CHECK: Check continuity of the wire harness between terminal AUI+ of the navigation ECU and terminal FL+ of the stereo component amplifier. Check continuity of the wire harness between terminal AUI- of the navigation ECU and terminal FL-of the stereo component amplifier. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
3. Check navigation system voice. OK: Replace stereo component amplifier. NG: Go to next step.
4. Check stereo component amplifier. CHECK: Check the voltage of terminal N-MU. OK: N-MU: See "Stereo component amplifier" of "TERMINAL OF ECU" NG: Go to step 7 . OK: Go to next step.
5. Check wire harness between navigation ECU and driver side door speaker. PREPARATION: Disconnect the navigation ECU and driver side door speaker connectors. CHECK: Check continuity of the wire harness between terminal AUO+ of the navigation ECU and terminal 1 of the driver side door speaker. Check continuity of the wire harness between terminal AUO- of the navigation ECU and terminal 2 of the driver side door speaker. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step
6. Check driver side door speaker. PREPARATION: Disconnect the driver side door speaker connectors. CHECK: Check the resistance between terminals 1 and 2. OK: Resistance: 2 - 9 ohm NG: Replace driver side door speaker. OK: Replace navigation ECU.
7. Check the navigation ECU. CHECK: Check voltage terminal MUTE. OK: MUTE: See "Navigation ECU" of "TERMINAL OF ECU". NG: Replace or repair wire harness or connector. OK: Replace the navigation ECU.

1. Check MAP DISC visually. NG: Replace MAP DISC. OK: Go to next step.
2. Insert MAP DISC without tilt. OK: Normal. NG: Go to next step.
3. Check navigation ECU. PREPARATION: Disconnect the navigation ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Replace navigation ECU.

1. Take appropriate measures according to caution screen. OK: Normal. NG: Go to next step.
2. Check MAP DISC visually. NG: Replace MAP DISC. OK: Replace navigation ECU.

1. Set map scale to max. OK: Normal. HINT: Correct the current position and check it again. NG: Go to next step.
2. Wipe disc with soft cloth, insert again, and turn ignition switch ON from OFF. OK: Normal. HINT: If the trouble still occurs, replace the navigation ECU. NG: Replace MAP DISC.

1. Setting check. (Is it set to Day Mode in screen adjustment?) YES: Normal. NO: Go to next step.
2. Check if screen is dimmed at night. (With light control switch ON, do all screens except navigation screen appear in Night Mode?) NG: Go to step 5 . OK: Go to next step.
3. Does beep sound by operating switches on the navigation screen? OK: Replace navigation ECU. NG: Go to next step.
4. Check "AVC-LAN communication circuit", see «AVC-LAN (COMMUNICATION BUS) CIRCUIT»(ref-198069-S33118440802005101400000) . CHECK: Check continuity of the wire harness between the navigation ECU and the multi display. OK: Continuity NG: Replace or repair AVC-LAN circuit. OK: Replace navigation ECU.
5. Check multi display. CHECK: Turn the light control switch to TAIL and check the voltage of terminal TAIL. OK: 10 - 14V NG: Check light control switch. OK: Replace multi display.

1. Display check mode (Touch switch, Touch point screen). NG: Replace multi display. OK: Go to next step.
2. Check "AVC-LAN communication circuit", see «AVC-LAN (COMMUNICATION BUS) CIRCUIT»(ref-198069-S33118440802005101400000) . CHECK: Check continuity of the wire harness between the navigation ECU and the multi display. OK: Continuity NG: Replace or repair AVC-LAN circuit. OK: Replace navigation ECU.

1. Check mark display. (At place with fine view, is GPS mark displayed or not?) NO: Go to step 7 . YES: Go to next step.
2. Does trouble occur in specific area or not? YES: Normal. (If vehicle is positioned in place where it is difficult to be identified, current vehicle position may be incorrectly displayed.) NO: Go to next step.
3. Setting check (Color of the automatic calibration button on the calibration screen). OK: Normal. NG: Go to next step.
4. Service check mode. (Is "58-43" output in unit check mode of navigation ECU?) See «PRE-CHECK»(ref-198069-S22018083862005101400000) . YES: Troubleshoot for each diagnosis. NO: Go to next step.
5. Navigation check mode. (Vehicle signal check mode: SPD) See «PRE-CHECK»(ref-198069-S22018083862005101400000) . NG: Replace or repair speed sensor wire harness. OK: Go to next step.
6. Recurrence test (Confirm phenomenon) (Correct current position and drive vehicle for a while with GPS mark displayed.) OK: Normal. NG: Replace navigation ECU.
7. Check connection of navigation antenna. (Bite or sharp bend) NG: Connect navigation antenna properly. OK: Go to next step.
8. Check optional components. (Does GPS mark appear if options such as theft deterrent system is removed?) YES: Remove them or change position of components. HINT: Some options receive radio signals. This may affect GPS reception. NO: Go to next step.
9. Is there anything such as a film stuck to window or any metal object on instrument panel? YES: Reception may be affected by a screen such as a film. NO: Go to next step.
10. Service check mode. (Is "58-40, 41" is output in unit check mode of navigation ECU?) See «PRE-CHECK»(ref-198069-S22018083862005101400000) . YES: Troubleshoot for each diagnosis. NO: Replace navigation antenna. HINT: If the trouble still occurs, replace the navigation ECU.

1. Check mark display. (At place with fine view, is GPS mark displayed or not?) YES: Normal. NO: Go to next step.
2. Check connection of navigation antenna. (Bite or sharp bend) NG: Connect navigation antenna properly. OK: Go to next step.
3. Check optional components. (Does GPS mark appear normally if options such as theft deterrent system is removed?) YES: Remove them or change position of components. HINT: Some options receive radio signals. This may affect GPS reception. NO: Go to next step.
4. Is there anything such as a film stuck to window or any metal object on instrument panel? YES: Reception may be affected by a screen such as a film. NO: Go to next step.
5. Service check mode. (Is "58-40, 41" is output in unit check mode of navigation ECU?) See «PRE-CHECK»(ref-198069-S22018083862005101400000) . YES: Troubleshoot for each diagnosis. NO: Replace navigation antenna. HINT: If the trouble still occurs, replace the navigation ECU.

1. Set volume to MAX in menu screen. Check that confirming voice can be heard. OK: Normal. (Voice navigation is not available because no destination is set, or the vehicle is running off the route.) NG: Go to next step.
2. Check wire harness between navigation ECU and driver side door speaker. PREPARATION: Disconnect the navigation ECU connector and driver side door speaker connectors. CHECK: Check continuity of the wire harness between terminal AUO+ of the navigation ECU and terminal 1 of the driver side door speaker. Check continuity of the wire harness between terminal AUO- of the navigation ECU and terminal 2 of the driver side door speaker. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
3. Check sound. (Check if radio sound can be heard from driver side door speaker.) OK: Replace navigation ECU. NG: Replace speaker.

1. Recheck. (While not rotating the vehicle, turn ignition switch ON from OFF again.) OK: Normal. (While the vehicle was turning, the ignition switch was turned ON.) NG: Go to next step.
2. System check mode. (Is "58-10" is output in unit check mode of navigation ECU?) See «PRE-CHECK»(ref-198069-S22018083862005101400000) . YES: Replace navigation ECU. NO: Go to next step.
3. System check mode. (Is "58-43" is output in unit check mode of navigation ECU?) See «PRE-CHECK»(ref-198069-S22018083862005101400000) . YES: Replace and repair SPD terminal wire harness. NO: Go to next step.
4. Navigation check mode. Vehicle signal check mode: SPD and gyro, see «PRE-CHECK»(ref-198069-S22018083862005101400000) . OK: Replace navigation ECU. NG: Replace or repair wire harness.

1. Navigation check mode. (Vehicle signal check mode: REV) See «PRE-CHECK»(ref-198069-S22018083862005101400000) . OK: Replace navigation ECU. NG: Go to next step.
2. Check navigation ECU. CHECK: Check terminal REV. OK: REV: See "Navigation ECU" of "TERMINAL OF ECU". OK: Replace navigation ECU. NG: Replace and repair wire harness.

1. Is this condition worse in comparison with other vehicle? YES: Receiving environment is bad. NO: Go to next step.
2. Are there any parts installed additionally? (Sun shade film, telephone antenna, etc.) YES: Does the condition get better if removing them? Influence of those parts. NO: Go to next step.
3. Check if there is any scratch and breaking of a wire for glass antenna and defogger pattern. (Visual check) YES: Repair (See "Defogger system") (See page BE-80) NO: Go to next step.
4. Is contact of radio plug jack OK? NO: Take measures for contact. YES: Go to next step.
5. Is antenna terminal on glass surface in contact with the defogger terminal? NO: Take measures for contact. YES: Go to next step.
6. Is there continuity in antenna cord? NO: Replace antenna cord. YES: Go to next step.
7. Check grounding of antenna, antenna cord and noise filter. NG: Grounding failure. OK: Go to next step.
8. Does condition get better by replacing antenna cord? YES: Replace antenna cord. NO: Replace rear window glass.

1. Is there a foreign object inside tape player? YES: Remove foreign object. NO: Go to next step.
2. Is auto search function of radio operating normally? NG: Radio and player is faulty. OK: Go to next step.
3. Check cassette tape for deformation or peeling-off of label. NG: Replace cassette tape. OK: Go to next step.
4. Is cassette tape slack? NG: Remove slack before using. OK: Replace radio and player.

1. Check RADIO NO. 1, P-ACC and P-IG fuse. NG: Replace fuse. OK: Go to next step.
2. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. HINT: When sending it for repair, leave as it is without attempting to take it out by force. OK: Replace radio and player.

1. Check that proper CD is inserted. (Is it CD and free from scratches or dirt?) NG: Use a proper CD. OK: Go to next step.
2. Check that CD is not set upside down. NG: Use a proper CD. OK: Replace radio and player. HINT: When sending it for repair, leave as it is without attempting to take it out by force.

1. Check RADIO NO. 1. P-ACC and P-IG fuse. NG: Replace fuse. OK: Go to next step.
2. Check radio and player. PREPARATION: Disconnect the radio and player. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness. OK: Replace radio and player. HINT: When sending it for repair, leave as it is without attempting to take it out by force.

1. Check sound. (Check if sound of radio, cassette tape, CD can be heard.) OK: System check mode. (Check radio and player.) See «PRE-CHECK»(ref-198069-S22018083862005101400000) . NG: Go to next step.
2. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. HINT: When sending it for repair, leave as it is without attempting to take it out by force. OK: Go to next step.
3. Check "AVC-LAN communication circuit", see «AVC-LAN (COMMUNICATION BUS) CIRCUIT»(ref-198069-S33118440802005101400000) . CHECK: Check continuity of the wire harness between the multi display and the radio and player. OK: Continuity NG: Replace or repair AVC-LAN circuit. OK: Replace radio and player.

1. Check sound. (Check if radio sound can be heard from driver side door speaker.) OK: Go to step 3 . NG: Go to next step.
2. Service check mode. (Stereo component amplifier) See «PRE-CHECK»(ref-198069-S22018083862005101400000) . CHECK : Troubleshoot for each diagnosis. OK: Replace multi display. NCON : Replace stereo component amplifier.
3. Check stereo component amplifier. PREPARATION: Disconnect the stereo component amplifier connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Replace stereo component amplifier.

1. Check mark display. (To examine whether air conditioner screen is displayed with air conditioner SW.) NG: Go to step 4 . OK: Go to next step.
2. Display check mode. (Vehicle signal check mode: IG) NG: Replace or repair speed sensor and wire harness. OK: Go to next step.
3. Display check mode. (Panel switch check, A/C-related switch check.) NG: Replace multi display. OK: Check gateway system. (A/C ECU communication circuit) (See page DI-1363)
4. Check "AVC-LAN communication circuit" See «AVC-LAN (COMMUNICATION BUS) CIRCUIT»(ref-198069-S33118440802005101400000) . CHECK: Check continuity of the wire harness between the gateway ECU and the radio and player. OK: Continuity NG: Replace or repair AVC-LAN circuit. OK: Check gateway system. (A/C ECU communication circuit)

1. Display check mode. (Vehicle signal check mode: IG) NG: Replace or repair speed sensor and wire harness. OK: Go to next step.
2. Display check mode. (Touch switch check) NG: Replace multi display. OK: Check gateway system. (A/C ECU communication circuit) (See page DI-1363)

1. Display check mode. (TAIL signal) NG: Replace multi display. OK: Replace and repair wire harness.

1. Check radio and player. CHECK: Check terminal ILL+. OK: ILL+: See "Radio and Player" of "TERMINAL OF ECU". OK: Replace radio and player. NG: Replace and repair wire harness.

1. Pad switch operation check. (To examine whether audio system can be operated with radio and player.) OK: Go to step 3 . NG: Go to next step.
2. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Replace radio and player.
3. Service check mode. (Gateway ECU) CHEK : Troubleshoot for each diagnosis. OK: Check gateway system. (Steering pad switch) NCON
4. Check gateway ECU. PREPARATION: Disconnect the gateway ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
5. Check wire harness between gateway ECU and radio and player. PREPARATION: Disconnect the gateway ECU and radio and player connectors. CHECK: Check continuity of the wire harness between terminal GTX+ (9) of the gateway ECU and terminal TXS+ (3) of the radio and player. Check continuity of the wire harness between terminal GTX- (20) of the gateway ECU and terminal TXS- (6) of the radio and player. OK: Continuity NG: Replace or repair wire harness or connector. OK: Replace gateway ECU.

1. Service check mode. (Audio and rear A/C control switch), see «PRE-CHECK»(ref-198069-S22018083862005101400000) . CHEK : Troubleshoot for each diagnosis. OK: Replace audio and rear A/C control switch. NCON
2. Check "AVC-LAN communication circuit", see «AVC-LAN (COMMUNICATION BUS) CIRCUIT»(ref-198069-S33118440802005101400000) . CHECK: Check continuity of the wire harness between the rear A/C amplifier and the audio and rear A/C control switch. OK: Continuity NG: Replace or repair AVC-LAN circuit. OK: Replace audio and rear A/C control switch.

1. Check microphone. NG: Replace microphone. OK: Go to next step.
2. Check overhead J/B. NG: Replace overhead J/B. OK: Go to next step.
3. Check wire harness between overhead J/B and telephone transceiver and speaker relay. PREPARATION: Disconnect the overhead J/B and telephone transceiver and speaker relay connectors. CHECK: Check continuity of the wire harness between terminals of the overhead J/B and those of the telephone receiver and speaker relay. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
4. Check wire harness between navigation ECU and telephone transceiver and speaker relay. PREPARATION: Disconnect the navigation ECU and telephone transceiver and speaker relay connectors. CHECK: Check continuity of the wire harness between terminals of the navigation ECU and those of the telephone receiver and speaker relay. OK: Continuity NG: Replace telephone transceiver and speaker relay. OK: Replace or repair wire harness or connector.

1. Service check mode. (TEL ECU) See «PRE-CHECK»(ref-198069-S22018083862005101400000) NG: Troubleshoot for each diagnosis. OK: Go to next step.
2. Check wire harness between navigation ECU and TEL ECU. PREPARATION: Disconnect the navigation ECU and TEL ECU connectors. CHECK: Check continuity of the wire harness between terminals of the cellular mobile telephone and those of the TEL ECU. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
3. Check TEL ECU. PREPARATION: Disconnect the TEL ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace TEL ECU. OK: Replace or repair wire harness.

1. Service check mode (TEL ECU). See «PRE-CHECK»(ref-198069-S22018083862005101400000) . NG: Troubleshoot for each diagnosis. OK: Go to next step
2. Check cellular mobile telephone antenna. Make sure telephone antenna is firmly attached to rear window glass. Check connection condition of connector, and whether or not harness is bitten or sharply bent. NG: Attach cellular mobile telephone antenna firmly. OK: Go to next step.
3. Check TEL ECU. PREPARATION: Disconnect the TEL ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness. OK: Go to next step.
4. Check wire harness between cellular mobile phone and TEL ECU. PREPARATION: Disconnect the cellular mobile phone and TEL ECU connectors. CHECK: Check continuity of the wire harness between terminals of the cellular mobile telephone and those of the TEL ECU. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
5. Check wire harness between navigation ECU and TEL ECU. PREPARATION: Disconnect the navigation ECU and TEL ECU connectors. CHECK: Check continuity of the wire harness between terminals of the navigation ECU and those of the TEL ECU. OK: Continuity NG: Replace or repair wire harness or connector. OK: Replace TEL ECU.

1. Check operation of pad switch. (Check whether or not audio system can be operated with radio and player.) NG: Go to step 4 . OK: Go to next step.
2. Check wire harness between steering pad switch and TEL ECU. PREPARATION: Disconnect the steering pad switch and TEL ECU connectors. CHECK: Check continuity of the wire harness between terminal TLSW (1) of the steering pad switch and terminal TSW+ of the TEL ECU. OK: Continuity NG: Replace or repair wire harness or connector. OK: Go to next step.
3. Check TEL ECU. PREPARATION: Disconnect the TEL ECU connector. CHECK: Check continuity at terminal TSW-. OK: Continuity NG: Replace or repair wire harness. OK: Replace TEL ECU.
4. Service check mode (Gateway ECU). See «PRE-CHECK»(ref-198069-S22018083862005101400000) . OK: Check gateway system (Steering pad switch). NCON
5. Check gateway ECU. PREPARATION: Disconnect the gateway ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 - 14V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 - 14V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG: Replace or repair wire harness or connector. OK: Replace steering pad switch.

1. Check whether or not these switches operate normally in other cellular mobile phones. NG: Replace cellular mobile telephone. OK: Go to next step.
2. Check wire harness between cellular mobile telephone and telephone transceiver and speaker relay. PREPARATION: Disconnect the cellular mobile telephone and telephone transceiver and speaker relay connectors. CHECK: Check continuity of the wire harness between terminals of the cellular mobile telephone and those of the telephone transceiver and speaker relay. OK: Continuity NG: Replace or repair wire harness or connector. OK: Replace telephone transceiver and speaker relay.

CIRCUIT DESCRIPTION

Each unit of the LEXUS navigation system connected with AVC-LAN (communication bus) transmits a signal of each switch.

When +B short or GND short occurs in this AVC-LAN, the LEXUS navigation system will not function normally as the communication is discontinued.

In this AVC-LAN, the radio and player becomes the master of the communication, having a resistance necessary for transmitting the signals.

AVC-LAN

Scheme 42

Scheme 43

Scheme 44

1. Disconnect "N6" connector of navigation ECU and check if AVC-LAN will be recovered normally. CHECK: Check that the display will change by pressing either of the Panel switch on the display. HINT: If the display is changed, recovery of AVC-LAN can be confirmed. OK: Replace navigation ECU. NG: Go to next step.
2. Disconnect connector "A38" of audio and rear A/C control switch and check if AVC-LAN will be recovered normally. CHECK: Check that the display will change by pressing either of the Panel switch on the display. HINT: If the display is changed, recovery of AVC-LAN can be confirmed. OK: Replace audio and rear A/C control switch. NG: Go to next step.
3. Disconnect connector "S33" of stereo component amplifier, check if AVC-LAN will be recovered normally. CHECK: Check that the display will change by pressing either of the Panel switch on the display. HINT: If the display is changed, recovery of AVC-LAN can be confirmed. OK: Replace navigation ECU and stereo amplifier, amplifier and rear control switch (See page BO-178). NG: Go to next step.
4. Disconnect the "S32" connector of stereo component amplifier and check if AVC-LAN will be recovered normally. CHECK: Check that the display will change by pressing either of the Panel switch on the display. HINT: It can be judged that AVC-LAN is recovered if the display is changed. OK: Replace the stereo component amplifier. NG: Go to next step.
5. Disconnect the "S35" connector of the stereo component tuner and check if AVC-LAN will be recovered normally. CHECK: Check that the display will change by pressing either of the Panel switch on the display. HINT: It can be judged that AVC-LAN is recovered if the display is changed. OK: Replace the stereo component tuner. NG: Go to next step.
6. Disconnect the "R4" connector of the radio and player and check if AVC-LAN will be recovered normally. CHECK: Check that the display will change by pressing either of the Panel switch on the display. HINT: It can be judged that AVC-LAN is recovered if the display is changed. NG: Repair or replace wire harness or connector between radio and player and stereo component tuner. OK: Go to next step.
7. Check wire harness and connector between radio and player and multi display. NG: Repair or replace wire harness or connector between radio and player and multi display. OK: Go to next step.
8. Skip radio and player and check AVC-LAN. PREPARATION: Disconnect radio and player "R5" connector. Using SST (Navigation Check Wire P/N 09843-18050), connect terminal TX+ to terminal TX- of "R5" connector of the radio and player. CHECK: Operate the panel switch of the display and check that the navigation system functions. (Check that AVC-LAN is recovered.) OK: Replace radio and player. NG: Replace multi display.