Pre-Check
1. PRECAUTIONa. The navigation (GPS) antenna for the LEXUS link system is installed under the center cluster. Therefore, attaching a metallic film to the front glass or setting any object close to the center cluster prevents the position data from being received properly.
b. If the ignition switch is turned ON while the airbag sensor assy center connector is disconnected, if a vehicle battery is removed while the ignition switch is ON, or if the +B circuit is open within 10 sec. after the ignition switch is turned OFF, the system will determine these conditions as failure and it will automatically call the LEXUS Link Center.
To prevent this, perform the following when performing work related to the airbag sensor assy center or the battery:
- Disconnect the connectors of the telephone ECU assy (mayday ECU) and the portable phone-L battery (back-up battery) before disconnecting the airbag sensor assy center connector.
- Be sure that the ignition switch is OFF when removing the vehicle battery.
HINT:
- When an emergency call is made automatically, access to the LEXUS Link Center and ask them to disregard the call.
- If no signal has been received from the airbag sensor assy center since the ignition switch was turned ON, a service call will be made.
- If signal reception from the airbag sensor assy is interrupted while the ignition switch is ON, an emergency call will be made.
c. When the life of the portable phone- L battery (back up battery) becomes short, the voltage drops and then telephone ECU assy (mayday ECU) detects "DTC 5", perform troubleshooting according to the procedures described at "DTC 5".
2. DIAGNOSIS SYSTEM
a. When a system error is detected, the LEXUS link system informs the driver of the error by providing the following voice warning: "A LEXUS link system error has been detected. Please contact your LEXUS dealer." Also, in the case below, it will make a service call to the LEXUS Link Center.
- While the ignition switch is ON, the telephone ECU assy (mayday ECU) cannot receive BEAN signal from the airbag sensor assy center.
- While the ignition switch is ON, no power is supplied from the vehicle battery.
3. DTC CHECK
a. Turning the ignition switch ON and OFF repeatedly 3 times within 15 sec. while pressing "PLAY" or "VOLUME+" allows the system to enter into the diagnosis mode. In this mode, diagnosis result is informed by a voice. Refer to DTC CHART for DTC details.
4. DTC CLEARANCE
a. DTC will be cleared when the trouble has returned to normal.
5. LEXUS LINK SYSTEM INFRASTRUCTURE TROUBLESHOOTING