| Last Modified: 7-3-2017 | 6.8:8.0.40 | Doc ID: RM000001BU0005X |
| Model Year Start: 2007 | Model: LX470 | Prod Date Range: [08/2006 - ] |
| Title: CELLULAR COMMUNICATION: LEXUS LINK SYSTEM: DTC CHECK / CLEAR; 2007 MY LX470 [08/2006 - ] | ||
DTC CHECK / CLEAR
1. DTC CHECK
HINT:
Turn the ignition switch ON, wait 5 seconds, and then check the DTC.
(a) Current DTC check
With the ignition switch ON, press and hold the PTT button, and then press the VOL+ button 5 times within 15 seconds.
(b) Historic DTC check
With the ignition switch ON, press and hold the PTT button, and then press the VOL- button 5 times within 15 seconds.
(c) Clear historic DTC
With the ignition switch ON, 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 assembly will blink in the applicable pattern. The blinking pattern shown in the illustration is 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 ignition switch OFF.
4. INFRASTRUCTURE TROUBLESHOOTING
LEXUS LINK SYSTEM:
|
Item |
Symptom |
Cause |
Check Method |
Countermeasure |
|---|---|---|---|---|
|
Activation |
Cannot be activated |
Infrastructure Mayday ECU |
Check if phone is connected to LEXUS Link call center when SERVICES button is pressed If it is, 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 rod, telephone antenna base, antenna wire, etc.
*3: When running the vehicle, make sure it is in the LEXUS Link service area. If in a flat area, the vehicle may only need to be driven a few miles before a connection can be made. If in a mountainous area, the vehicle may have to be driven dozens of miles before the connection can be made.
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