Lexus NX: Precaution
PRECAUTION
WHEN DISCONNECTING AUXILIARY BATTERY CABLE
NOTICE:
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After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal.
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When disconnecting and reconnecting the auxiliary battery.
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HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
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WHEN AUTOMATIC COLLISION NOTIFICATION HAS ACTIVATED
(a) Perform "ACN CALL END" with the Techstream to terminate ACN (Automatic Collision Notification) with the call center.
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WHEN DISCONNECTING CONNECTORS FROM DCM (TELEMATICS TRANSCEIVER)
(a) The power switch must be off.
WHEN REPLACING DCM (TELEMATICS TRANSCEIVER)
(a) After installing a new Telematics Data Communication Module (DCM [telematics transceiver]), perform "DCM ACTIVATION" with the Techstream. This allows the Telematics service provider to register the new DCM (telematics transceiver) and to delete the old DCM (telematics transceiver) information from their database.
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NOTICE:
Do not replace the DCM (telematics transceiver) with one from another vehicle.
WHEN UNABLE TO CONTACT WITH CALL CENTER BUT NO DTC
(a) This may occur when the cellular signal strength was very weak. Check "DCM OPERATION HISTORY" with the Techstream.
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WHEN DIAGNOSING DCM (TELEMATICS TRANSCEIVER)
(a) While attempting to diagnose the DCM (telematics transceiver), do not use a DCM (telematics transceiver) from another vehicle. Each DCM (telematics transceiver) is registered to a specific VIN and should not be tested in another vehicle.
PRECAUTION FOR DCM (TELEMATICS TRANSCEIVER)
(a) The DCM (telematics transceiver) uses electrical waves (LTE [Long Term Evolution]). Radio waves and telephone network line may occasionally be unstable depending on time or location factors. Therefore, as for the connection malfunction, as there is the possibility of a temporary phenomenon due to the condition of electrical waves, it is necessary to determine by comparing with occurrence frequency or cellular phone.
(b) With the exception of replacing the mobilephone battery, the DCM (telematics transceiver) cannot not be disassembled (the DCM [telematics transceiver] case must not be opened). Replace parts.
PRECAUTION FOR MOBILEPHONE BATTERY
(a) The mobilephone battery is a Lithium-ion type battery and can be charged from the DCM (telematics transceiver).
(b) When ACN (Automatic Collision Notification) is performed, the mobilephone battery provides power to the DCM (telematics transceiver).
NOTICE:
The mobilephone battery must not be replaced while an ACN call is in progress.
HINT:
When a Manual Emergency Call is made, the mobilephone battery is not used as the power source.
(c) When it is time to replace the mobilephone battery, the manual (SOS) switch red indicator will come on. The DCM (telematics transceiver) will also store a DTC or specific vehicle control history (RoB) code.
PRECAUTION FOR REGISTRATION
(a) If replacing the DCM (telematics transceiver), refer to Work Procedure of When Replacing or Removing/Installing Parts.
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(1) DCM (telematics transceiver)
(2) Mobilephone battery
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Parts Location
PARTS LOCATION ILLUSTRATION *A w/o Navigation System *B w/ Navigation System *1 FRONT NO. 1 SPEAKER ASSEMBLY RH *2 FRONT NO. 2 SPEAKER ASSEMBLY RH *3 TELEPHONE MICROPHONE ASS
System Diagram
SYSTEM DIAGRAM
System Description
SYSTEM DESCRIPTION DESCRIPTION (a) Safety Connect performs ACN (Automatic Collision Notification), manual emergency calling, stolen vehicle tracking and roadside assistance service, by audio and data
SEE MORE:
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: When replacing the radio receiver assembly, always replace it with a new one. If a radio receiver assembly which was installed to another vehicle is used, the following may occur:
A communication malfunction DTC may be stored.
The radio receiver assembly may not o
Back Door Entry Unlock Function does not Operate
DESCRIPTION If the entry unlock function does not operate for the back door only, but the entry lock function operates, the request code is being transmitted properly from the back door. In this case, there may be a problem related to the open switch (connection between the back door opener switch a
