Emergency Contact Module: Service Precautions

CELLULAR COMMUNICATION: LEXUS LINK SYSTEM: PRECAUTION

PRECAUTION

1. NOTICE FOR DISCONNECTING CABLE FROM NEGATIVE (-) BATTERY TERMINAL
NOTICE:
After the power 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 power switch OFF, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.

2. INSPECTION PRECAUTION FOR LEXUS LINK SYSTEM
(a) When the mayday battery runs low, the mayday ECU sets DTC 6-1. Perform troubleshooting according to the malfunction indicated by 6-1.
3. WHEN REPLACING MAYDAY ECU
(a) If replacement of the ECU is necessary, replace the mayday battery (backup battery) together with the ECU. After the replacement, register the ECU Programming and Relearning.