Lexus Link System (Diagnostics - Introduction): Other Lexus GS III рестайлинг

PRECAUTION

Note. When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See procedure Intuitive Parking Assist System Refer to INITIALIZATION Theft Deterrent System Variable Gear Ratio Steering System

1. INSPECTION PRECAUTION FOR LEXUS LINK SYSTEM When the mayday battery runs low, the mayday ECU sets DTC 6-1. Perform troubleshooting according to the malfunction indicated by 6-1.
2. WHEN REPLACING 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.

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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., Hawaii, and Canada where GPS and cellular services are available. System function Function Outline Automatic Emergency Call In event of accident in which SRS airbags are deployed, upon receiving deployment signal from center airbag sensor, mayday ECU automatically makes emergency call and transmits vehicle position and user information to LEXUS Link call center User can then speak with LEXUS Link call center advisor and receive assistance Manual Emergency Call Pressing "EMERGENCY" button causes mayday ECU to make emergency call. Mayday ECU transmits vehicle position and user information to LEXUS Link call center User can then speak with LEXUS Link call center advisor and receive assistance Roadside Assistance Pressing "SERVICES" button causes mayday ECU to make Service Call. Mayday ECU transmits vehicle position and user information to LEXUS Link call center. User can then speak with LEXUS Link call center advisor and receive assistance. Advisor Record During call with LEXUS Link call center advisor, pressing SERVICES button enables conversation to be recorded Advanced Services If user has registered necessary service information at Lexus.com within owner's only section, owner can receive voice recordings from internet for weather, traffic and other information Remote Door Locking / Unlocking If driver notices that key was in vehicle, doors can be locked or unlocked remotely by LEXUS Link call center advisor by calling LEXUS Link call center Remote Horn and Lights If user calls LEXUS Link call center, LEXUS Link call center advisor can flash lights and sound horn remotely Handsfree Calling Pressing PHONE or PTT button enables driver to make calls handsfree Stolen Vehicle Tracking In event of vehicle theft, if user calls LEXUS Link call center, LEXUS Link call center advisor confirms and tracks vehicle position using GPS LEXUS Link call center advisor also calls police when necessary Self Diagnosis When system error is detected, LEXUS Link system informs driver by red LED illumination or voice warning Mayday ECU will store malfunction codes Voice Prompt Mayday ECU informs users by voice prompt Function of main components Component Outline Mayday switch assembly PTT Button PTT is abbreviation for Push To Talk Operating this button activates voice recognition (to enter dial tones 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 SERVICE 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 diagnostic mode to indicate DTC Indicator (Red LED) Turns on when mayday ECU detects malfunction in system Blinks when call is made when system is still malfunctioning Turns off when system is operating normally Blinks if in diagnostic mode to indicate DTC 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 Mayday ECU controls LEXUS Link system and provides service according to user's request. Also, if detecting malfunction in system, this ECU blinks red LED to inform driver of malfunction. Mayday battery (Backup battery) In case of automatic or manual emergency call, mayday battery provides power to mayday ECU when power supply from vehicle battery is cut off Telephone antenna assembly (GPS antenna) Receives signals from GPS satellites and transmits vehicle position signal to mayday ECU Telephone antenna assembly (Cellular phone antenna) 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 mayday ECU and receives signals from LEXUS Link call center or other phones Front No. 2 speaker assembly (instrument panel 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 the map light assembly (overhead junction block) Center airbag sensor assembly Outputs airbag deployment signal to mayday ECU 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 (power 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 power switch is turned OFF, remote service is possible as the system is on standby for incoming calls HINT: *: This mode turns to Off mode after 48 hours have elapsed. 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 on-line 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 HINT: Turn the power switch OFF and disconnect the vehicle battery before replacing the mayday ECU (together with mayday battery) or when just replacing the mayday battery. Historic DTCs may be set if the vehicle battery is not disconnected during ECU installation/replacement. The mayday ECU estimates the remaining power of the mayday battery based on the mayday battery usage time. Replaced part Registration procedure Mayday ECU and mayday battery Mayday ECU initialization Mayday ECU registration / enrollment Mayday battery only (When DTC 6-1 is detected 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 power 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 mayday ECU 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 on-line 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 "MAYDAY ECU 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 "MAYDAY ECU 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 an 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. MAYDAY ECU INITIALIZATION HINT: This procedure is for switching a new mayday ECU from the Factory Mode into Demo Mode. Turn the power switch from OFF to ON (IG) (engine does not have to be running). The mayday ECU will perform the Factory Mode Start Sequence for approximately 30 seconds. HINT: In Factory Mode, for each power 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 detected 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 power switch must be ON (IG) for the SERVICES button to function). Additionally, after each power 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 will repeat 5 times if a DTC is set) will occur after each power 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 set. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-387182-S28664086142011022400000) . Do not push any buttons during any start sequences (LED flashing or voice prompts).
3. MAYDAY ECU REGISTRATION / ENROLLMENT Turn the power switch ON (IG) and wait for the 5 second LED flash start sequence. Press the SERVICES button when the mayday ECU 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 "MAYDAY ECU 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 mayday ECU. 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 power 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 mayday ECU 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 the new mayday battery when it arrives from the factory, and current DTC 6-1 is not set, do not perform the new mayday battery registration (the battery is already registered to the ECU that it is connected to). Turn the power 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 approximately a 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 set in Factory Mode after this start sequence. This can be confirmed if the red LED remains on and an additional 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, cycle the power switch to OFF then ON (IG). Wait for the start sequence to complete. The new mayday battery is now registered to the mayday ECU and DTC 6-1 should be cleared. HINT: The mayday battery registration can be done in any mode (Factory Mode, Demo Mode or activity enrolled).
5. MAYDAY BATTERY CONFIRMATION After replacement check: If the "MAYDAY BATTERY REGISTRATION BUTTON SEQUENCE" has been completed, turn the power 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, current DTC 6-1 will continue to be detected 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.

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1. ARRANGEMENT OF MAYDAY ECU TERMINAL Symbols (Terminal No.) Wiring Color Terminal Description +B (U45-1) GR Vehicle battery power supply SPO+ (U45-2) LG Audio speaker output + SPO- (U45-3) L Audio speaker output - MCVD (U45-7) BE Microphone power supply MCI+ (U45-8) G Microphone input signal + MCI- (U45-9) R Microphone input signal - SPI+ (U45-10) LG Sound signal SPI- (U45-11) L Sound signal E (U45-12) W-B Ground IG2 (U45-13) B IG power supply ACC (U45-14) V ACC power supply GSW (U45-16) Y Airbag signal MCO+ (U45-17) B Microphone output MCO- (U45-18) W Audio ground SG (U45-19) Shielded Shield ground HFOF (U45-21) P Phone mute MUTE (U45-22) W Radio mute MPX1 (U45-23) GR MPX line BBI+ (U46-2) L Mayday battery input SLED (U46-3) GR Mayday switch backup light IND1 (U46-4) G Red LED output SIGI (U46-5) LG Mayday switch input BBI- (U46-9) Y Mayday battery input IND2 (U46-11) W Green LED output SIG- (U46-12) B Mayday switch ground SIG2 (U46-13) SB Mayday switch input WFSE (U46-14) P DLC3 line SIL (U46-15) R DLC3 line
2. CHECK MAYDAY ECU Disconnect the U45 and U46 ECU connectors. Measure the resistance and voltage of the wire harness side connectors. Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition E (U45-12) - Body ground W-B - Body ground Ground Always Below 1 ohms +B (U45-1) - Body ground GR - Body ground Vehicle battery power supply Always 10 to 14 V ACC (U45-14) - Body ground V - Body ground ACC power supply Power switch ON (ACC) 10 to 14 V IG2 (U45-13) - Body ground B - Body ground IG power supply Power switch ON (IG) 10 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side.

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1. DESCRIPTION When a system error is detected, the LEXUS Link system informs the driver of the error by illuminating the red LED on the mayday switch. If the red LED is malfunctioning, the following voice warning is provided: "A system error has been detected. Please contact your LEXUS dealer."
2. CHECK BLINKING PATTERN (FAST1) Check current DTC. Refer to «DTC CHECK / CLEAR»(ref-387182-S26125044132011022400000) . If the blinking pattern is the same as in the illustration, there is no problem. HINT: This blinking pattern is output when both of the following conditions are met: 1) there is a LEXUS Link service subscription, and 2) in data mode, there are no current or historic DTCs.
3. CHECK BLINKING PATTERN (FAST2) Check current DTC. Refer to «DTC CHECK / CLEAR»(ref-387182-S26125044132011022400000) . If the blinking pattern is the same as in the illustration, a historic DTC exists. Perform repairs according to the diagnostic trouble code chart. HINT: This blinking pattern is output when both of the following conditions are met: 1) there is a LEXUS Link service subscription, and 2) in data mode, there is no current DTC but there is a historic DTC.

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1. DTC CHECK HINT: Turn the power switch ON (IG), wait 5 seconds, and then check the DTC. Current DTC check With the power switch ON (IG), press and hold the PTT button, and then press the VOL+ button 5 times within 15 seconds. Historic DTC check With the power switch ON (IG), press and hold the PTT button, and then press the VOL- button 5 times within 15 seconds. Clear historic DTC With the power switch ON (IG), press and hold the PTT button, and then press the door unlock switch of the power window regulator master switch 5 times within 15 seconds.
2. LED BLINKING PATTERN When the system is in the diagnosis mode, the red and green LEDs on the mayday switch will blink in the applicable pattern. The blinking pattern shown in the illustration is an example of DTC 3-2 and 4-3. DTCs will be output in numerical order. A set of DTC blinking patterns will be output twice.
3. EXIT DIAGNOSIS MODE Diagnostic mode can be exited by turning the power switch OFF.
4. INFRASTRUCTURE TROUBLESHOOTING LEXUS Link system Item Symptom Cause Check Method Countermeasure Activation Cannot be activated Infrastructure Mayday ECU Check if phone connects to LEXUS Link call center when SERVICES button is pressed If it does, problem may be in LEXUS Link call center / infrastructure If mayday ECU is within cover service area of system, replace it*1 If problem is in LEXUS Link call center / infrastructure, inform TMS and request repairs If problem is in mayday ECU, replace it*1 In some cases, moving vehicle to another location and trying to activate service connection again can solve problem Service Call Emergency Call Cannot connect to LEXUS Link call center Connection retry frequently occurs Infrastructure Telephone antenna (Cellular phone antenna)*2 Mayday ECU Run vehicle, check whether connection is related to place or area*3 If it is not related to place or area, problem may be in mayday ECU or telephone antenna (cellular phone antenna)*2 If it is related to place or area, problem may be in infrastructure If problem is not infrastructure, check wiring connection of telephone antenna (cellular phone antenna)*2 If there are no connection problems, check mayday ECU Cannot connect to LEXUS Link call center Connection retry frequently occurs Infrastructure Setup of infrastructure may be wrong Cellular carrier in area is not set up to accept Mobile Identification Number (MIN) for mayday ECU on vehicle Inform TMS and request setup Disconnection immediately after connection Infrastructure Telephone antenna (Cellular phone antenna)*2 Mayday ECU Run vehicle, check whether connection is related to place or area*3 If it is not related to place or area, problem may be in mayday ECU or telephone antenna (cellular phone antenna)*2 If it is related to place or area, problem may be in infrastructure If problem is not infrastructure, check wiring connection of telephone antenna (cellular phone antenna)*2 If there are no problems with above areas, check mayday ECU After connecting to LEXUS Link call center and driving long distance, connection worsens Infrastructure There is difference between registered information of location during activation and information in current location, leading to bad LEXUS Link call center connection Contact LEXUS Link call center with service call, ask to change registration information and download setup information again LEXUS Link system has no response after messages "Connecting to LEXUS Link" or "Connecting to LEXUS Link Emergency" Infrastructure Telephone antenna (Cellular phone Antenna)*2 Mayday ECU Run vehicle, check whether connection is related to place or area*3 If it is not related to place or area, problem may be in mayday ECU or telephone antenna (cellular phone antenna)*2 If it is related to place or area, problem may be in infrastructure Cellular electronic wave condition in area may cause this problem As vehicle data reaches LEXUS Link call center, call center will call back to vehicle Communication quality is abnormal Infrastructure LEXUS Link system Run vehicle, check whether connection is related to place or area*3 If it is not related to place or area, problem may be in mayday ECU or telephone antenna (cellular phone antenna)*2 If it is related to place or area, problem may be in infrastructure If problem is not in infrastructure, check vehicle equipment such as mayday switch, etc. HINT: *1: If replacement of the ECU is necessary, replace the mayday battery (backup battery) together with the ECU. After the replacement, register the ECU. *2: Telephone antenna includes peripheral parts such as the telephone antenna (GPS antenna), telephone antenna base, antenna cord, etc. *3: When running the vehicle, make sure it is in the LEXUS Link service area. If on a level surface, the vehicle may only need to be driven a short distance before a connection can be made. If in a mountainous area, the vehicle may have to be driven a long distance before the connection can be made.