Cellular Communication (Dianostics - Introduction): Other Lexus LX J200

PRECAUTION

1. NOTICE FOR DISCONNECTING CABLE FROM NEGATIVE (-) BATTERY TERMINAL NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
2. INSPECTION PRECAUTION FOR LEXUS LINK SYSTEM When the mayday battery runs low, the telephone ECU assembly stores DTC 6-1. Perform troubleshooting according to the malfunction indicated by DTC 6-1.
3. WHEN REPLACING TELEPHONE ECU ASSEMBLY (MAYDAY ECU) If replacement of the ECU is necessary, replace the mayday battery (backup battery) together with the ECU. After the replacement, register the ECU. Refer to «REGISTRATION»(ref-385285-S20978396562011021400000) .

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1. DESCRIPTION Description LEXUS Link is a consumer-based wireless voice and data service for automotive applications, more broadly known as telematics. LEXUS Link is a combination of an on-board dedicated cellular phone, GPS (Global Positioning System), software, hardware, and a remote support call center. The LEXUS Link system is designed to work anywhere in the continental U.S. where GPS and cellular services are available. System function Function Outline Automatic Emergency Call In the event of an accident in which the SRS airbags are deployed, upon receiving a deployment signal from the center airbag sensor, the telephone ECU assembly automatically makes an emergency call and transmits the vehicle position and user information to the LEXUS Link call center. The user can then speak with the LEXUS Link call center advisor and receive assistance. Manual Emergency Call Pressing the emergency button causes the telephone ECU assembly to make an emergency call. The telephone ECU assembly transmits the vehicle position and user information to the LEXUS Link call center. The user can then speak with the LEXUS Link call center advisor and receive assistance. Roadside Assistance Pressing the SERVICES button causes the telephone ECU assembly to make a service call. The telephone ECU assembly transmits the vehicle position and user information to the LEXUS Link call center. The user can then speak with the LEXUS Link call center advisor and receive assistance. Advisor Record During a call with the LEXUS Link call center advisor, pressing the SERVICES button enables the conversation to be recorded. Advanced Services If the user has registered necessary service information at lexus.com within the owners only section, the owner can receive voice recordings from the internet for weather, traffic and other information. Remote Door Locking/Unlocking The doors can be locked or unlocked remotely by the LEXUS Link call center advisor by calling the LEXUS Link call center. Remote Horn and Lights If the user calls the LEXUS Link call center, the LEXUS Link call center advisor can flash the lights and sound the horn remotely. Handsfree Calling Pressing the phone or PTT button enables the driver to make calls handsfree through voice recognition. Stolen Vehicle Tracking In the event of a vehicle theft, if the user calls the LEXUS Link call center, the LEXUS Link call center advisor confirms and tracks the vehicle position using the GPS. The LEXUS Link call center advisor also calls the police when necessary. Self Diagnosis When the system error is detected, the LEXUS Link system informs the driver by the red LED illumination or voice warning. The telephone ECU assembly will store trouble codes. Voice Prompt The telephone ECU assembly informs the users using a voice prompt. Function of main components Component Outline Map light assembly (Mayday switch) PTT button PTT is abbreviation for Push To Talk Operating this button activates voice recognition (to enter numbers for automated systems, e.g., voice mail) function and makes telephone number registration and handsfree calls possible VOL button Volume control button It is possible to adjust volume during calls or even when audio system is off Phone button Usually has same functions as PTT button. However, in case of answering or hanging up phone, this button also works as hook switch. SERVICES button Call is made to LEXUS Link call center advisor and contracted service can be received by pressing this button Pressing SERVICES button while speaking to LEXUS Link call center advisor activates advisor record function. Playing recorded voice can be done using voice recognition function. Emergency button In case of emergency, call is made to LEXUS Link call center Call center will answer call ahead of other calls Indicator (Green LED) Turns on when system is under service contact and operating normally Blinks during call and turns off when system is not enrolled (contract expired). Also turns off when red LED is on. Blinks when in diagnosis mode to indicate DTC Indicator (Red LED) Turns on when telephone ECU assembly detects malfunction in system Blinks when call is made when system is still malfunctioning Turns off when system is operating normally Blinks if in diagnosis mode to indicate DTC Telephone ECU assembly (Mayday ECU) Main control ECU of LEXUS Link system Radio cellular phone module makes or receives call GPS receiver receives signals from telephone antenna (GPS antenna), and transmits vehicle position to CPU Telephone ECU assembly controls LEXUS Link system and provides service according to the request of the user. Also, if detecting malfunction in system, this ECU blinks red LED to inform driver of malfunction. Mayday battery In case of automatic or manual emergency call, mayday battery provides power to telephone ECU assembly when power supply from vehicle battery is cut off Telephone antenna assembly (GPS antenna function) Receives signals from GPS satellites and transmits vehicle position signal to telephone ECU assembly Telephone antenna assembly (Cellular phone antenna function) This antenna is for mobile phones. It is compatible with transmission and reception of frequency bands of analog and digital (CDMA) mobile phones. Transmits signals from telephone ECU assembly and receives signals from LEXUS Link call center or other phones Front No. 2 speaker RH Outputs voice of LEXUS Link call center advisor, audio sound and voice prompts Shared with audio system Microphone amplifier assembly Voice amplification equipment Shared with navigation system Located in map light assembly (overhead junction block) Center airbag sensor assembly Outputs airbag deployment signal to telephone ECU assembly Bus buffer ECU Converts communication between telephone ECU assembly and other ECUs to CAN or BEAN Infrastructure Refers to all communication related to LEXUS Link system System operation Operation mode Mode Description Off Mode The system is in a full sleep state On Mode The system is operating (engine switch is on (IG)) Backup Battery Strategy Flow Mode When certain conditions are fulfilled, the system changes to backup battery mode DRx Mode* After the engine switch is turned off, remote service is possible as the system is on standby for incoming calls HINT: *: (1) If the system is registered in a digital cellular network: During the first 8 hours after the engine switch is turned off, the system will remain in stand-by to receive incoming call center calls. After this 8 hour period and for the next 40 hours, the system will cycle between stand-by for 1 minute and off mode for 9 minutes. The system can still receive incoming call center calls during this cycling period. After a total of 48 hours after the engine switch is turned off, the system will switch into off mode until the next time the engine switch is turned on (IG). No call center calls can be received during this time. *: (2) If the system is registered in an analog cellular network: After the engine switch is turned off, the system will immediately begin the 1 minute stand-by and 9 minute off mode cycle and continue this cycle for 48 hours. After a total of 48 hours, the system will switch into off mode until the next time the engine switch is turned on (IG) (there is no 8 hour stand-by in an analog network). *: (3) The system requires a GPS fix to perform the functions described in (1), and (2). If there is no GPS fix, the system will enter off mode immediately after the engine switch is turned off. *: (4) GPS fix is lost when B+ is removed from the telephone ECU assembly (mayday ECU). To obtain a GPS fix after re-connecting B+ to the ECU, park the vehicle with the engine switch on (IG) for approximately 5 minutes outside in an open area. Subscription mode Mode Description Active Mode Active mode settings are set by the LEXUS Link call center through wireless communication protocol (data is downloaded) Active mode functions according to the type of LEXUS Link subscription De-active Mode De-active mode settings are set by the LEXUS Link call center through wireless communication protocol (data is rewritten) If a subscription is made and then temporarily canceled, the system is in de-active mode In de-active mode, pressing the SERVICES button will initiate a voice recording.* If the SERVICES button is pressed again during the voice recording, you will be connected to a subscription advisor at the LEXUS Link call center. Your subscription can then be renewed. HINT: *: Demo message is "Hello and welcome to LEXUS Link. For LEXUS Link services, contact a LEXUS Link advisor by pressing the SERVICES button again. For additional information, visit us online at Lexus.com in the owner section or talk to your LEXUS dealer." LED indicator functions System Status LED Status (No DTC, Service Enabled) LED Status (No DTC, Service Disabled) LED Status (Current DTC, Service Enabled) LED Status (Current DTC, Service Disabled) Power up LEDs flash in sequence LEDs flash in sequence LEDs flash in sequence LEDs flash in sequence No call state Illuminates green Off Illuminates red Illuminates red User call state Blinking green Blinking green Blinking red Blinking red

REGISTRATION

1. DESCRIPTION NOTE: If replacement of the ECU is necessary, replace the mayday battery (backup battery) together with the ECU. HINT: Turn the engine switch off and disconnect the vehicle battery before replacing the telephone ECU assembly (together with mayday battery) or when just replacing the mayday battery. Historic DTCs may be stored if the vehicle battery is not disconnected during ECU installation/replacement. The telephone ECU assembly estimates the remaining power of the mayday battery based on the mayday battery usage time. Replaced part Registration procedure Telephone ECU assembly and mayday battery Telephone ECU assembly initialization Telephone ECU assembly registration/enrollment Mayday battery only (When DTC 6-1 is stored and after installing the new mayday battery) Mayday battery registration Mayday battery confirmation LEXUS Link Operation Modes Factory Mode This is the default mode from the factory. In this mode, a Japanese prompt will play when the engine switch is turned on (IG). After any button is pressed, a voice prompt will play "System not initialized, a call cannot be placed." Demo Mode (Dealer Mode) A button sequence will initialize the telephone ECU assembly from Factory Mode into Demo Mode. In Demo Mode, pressing the SERVICES button will play the voice prompt "Hello and welcome to LEXUS Link. For LEXUS Link services, contact a LEXUS Link advisor by pressing the SERVICES button again. For additional information, visit us online at Lexus.com in the owner section or talk to your LEXUS dealer." Pressing the SERVICES button again during this voice prompt will place an enrollment call to the LEXUS Link call center. HINT: See "Telephone ECU assembly Initialization" for the button sequence to switch the ECU from Factory Mode into Demo Mode. If the ECU will not switch from Factory Mode to Demo Mode, and there are no prompts played when pushing any buttons, the ECU may have been inadvertently placed into an Engineering Mode. In this case, perform this button sequence to switch the ECU back into Factory Mode. While pressing and holding the VOL- button, press the SERVICES button 5 times within 15 seconds, then release both buttons. The ECU will perform a Factory Mode Start Sequence as described under "Telephone ECU assembly Initialization". Active Mode The LEXUS Link call center will configure this mode automatically after customer enrollment. De-active Mode The LEXUS Link call center will configure this mode automatically after enrollment expires. The SERVICES button will operate the same as in Demo Mode. Therefore, the customer can push it twice to contact the LEXUS Link call center for re-enrollment.
2. TELEPHONE ECU ASSEMBLY INITIALIZATION HINT: This procedure is for switching a new telephone ECU assembly from the Factory Mode into Demo Mode. Turn the engine switch from off to on (IG) (engine does not have to be running). The telephone ECU assembly will perform the Factory Mode Start Sequence for approximately 30 seconds. HINT: In Factory Mode, for each engine switch cycle off to on (IG), or after checking or clearing DTCs, the ECU will perform a start sequence that includes a Japanese prompt and flashing LEDs (approximately 30 seconds). Then the LEDs will turn off. Do not push any buttons during this start sequence. If there is a DTC stored during this Factory Mode Start Sequence, after the start sequence, the red LED will remain on and a Japanese prompt will repeat 5 times. Do not press any buttons during these prompts. BUTTON SEQUENCE: While pressing and holding the VOL+ button, press and release the Phone button 5 times within 15 seconds, then release the VOL+ button. When switched to Demo Mode, each LED will flash one time then turn off (approximately 5 seconds). CONFIRMATION: Confirm Demo Mode by pressing the SERVICES button and listening for the demo prompt "Hello and welcome to LEXUS Link..." (the engine switch must be on (IG) for the SERVICES button to function). Additionally, after each engine switch cycle off to on (IG), the LEDs will each flash one time each. This start sequence takes approximately 5 seconds. If Demo Mode is not confirmed, repeat the initialization procedure. HINT: Before troubleshooting a DTC, attempt to initialize the ECU into Demo Mode with the button sequence. Then access DTCs and troubleshoot the ECU in Demo Mode. If necessary, DTCs can still be accessed in Factory Mode. However, the 30 second Factory Mode Start Sequence (and the Japanese prompt, which will repeat 5 times if a DTC is stored) will occur after each engine switch cycle off to on (IG), and after each DTC check or clear. Do not press any buttons during this start sequence. A red LED continuously on in any mode indicates that there is a current DTC stored. Refer to the DTC chart. Do not push any buttons during any start sequences (LED flashing or voice prompts).
3. TELEPHONE ECU ASSEMBLY REGISTRATION/ENROLLMENT Turn the engine switch on (IG) and wait for the 5 second LED flash start sequence. Press the SERVICES button when the telephone ECU assembly is set normally and confirm that the following demo message is provided. "Hello and welcome to LEXUS Link...". If the message is not provided, perform the "TELEPHONE ECU ASSEMBLY INITIALIZATION BUTTON SEQUENCE" again. As the message states, press the SERVICES button again during the prompt to connect to the LEXUS Link call center. HINT: Usually this call will connect within 15 to 30 seconds. However, it may take several minutes depending on cellular service in the area. A progression tone (i.e., beep) will be heard every 5 seconds to indicate that the connection attempt is in progress. A LEXUS Link call center advisor will answer and instruct the technician on how to register/enroll the new telephone ECU assembly. The ESN, STID and VIN may be required at this time. HINT: If the LEXUS Link call center cannot be reached after several attempts using the SERVICES button, or a cell tower message is heard, such as "Welcome to Verizon Wireless, your phone is not active at this time...", call the LEXUS Link call center by pushing the EMERGENCY button. The LED flash start sequence (approximately 5 seconds) after the engine switch is cycled or after checking/clearing DTCs remains present after enrollment. A green LED continuously on after this sequence indicates that the LEXUS Link System is activity enrolled.
4. MAYDAY BATTERY REGISTRATION HINT: This procedure is required to register a new mayday battery and clear DTC 6-1. This procedure matches the new mayday battery with the new or used ECU. A new telephone ECU assembly always requires a new mayday battery (used mayday batteries should not be reused in a new ECU). If the new replacement ECU is packaged and already connected to a new mayday battery when it arrives from the factory, and current DTC 6-1 is not stored, do not perform the new mayday battery registration (the battery is already registered to the ECU that it is connected to). Turn the engine switch from off to on (IG) and wait for the start up sequence of LED flashing to complete. Do not press any buttons during this start up sequence. (Note that Demo Mode and active enrolled ECUs have an approximately 5 second LED flashing start sequence. Factory Mode has approximately 30 seconds of LED flashing with a Japanese voice prompt. Also, note if a current DTC is stored in Factory Mode after this 30 second start sequence, if the red LED remains on and if another Japanese prompt repeats 5 times.) BUTTON SEQUENCE: Press and hold the PTT button while completing the following sequence of button presses. VOL+, VOL+, VOL-, VOL-, VOL+, VOL+, VOL-, VOL-, VOL+, VOL+, VOL-, VOL- Release all buttons. This button press sequence should be performed within 15 seconds. The system will then perform the same start sequence as described above. After this start sequence completes, turn the engine switch off then on (IG). Wait for the start sequence to complete. The new mayday battery is now registered to the telephone ECU assembly and DTC 6-1 should be cleared. HINT: The mayday battery registration can be done in any mode (Factory Mode, Demo Mode or active enrolled).
5. MAYDAY BATTERY CONFIRMATION After mayday battery replacement and completion of the "MAYDAY BATTERY REGISTRATION BUTTON SEQUENCE", turn the engine switch off and on (IG), and wait for the start sequence described in the "MAYDAY BATTERY REGISTRATION". Then check that current DTC 6-1 is cleared. NOTE: If the "MAYDAY BATTERY REGISTRATION BUTTON SEQUENCE" has not been completed correctly, DTC 6-1 remains stored even if the mayday battery is replaced with a new one. In this case, check to be sure the old battery is removed and the new battery is installed. Then perform the "MAYDAY BATTERY REGISTRATION BUTTON SEQUENCE" again.