Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
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When a symptom indicates that a service is malfunctioning, use the Techstream to check whether the service subscription is active.
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| Symptom | Suspected Area | Link |
|---|---|---|
| "Communication Module failure detected, please contact your dealer" message is played. | Diagnostic Trouble Code Chart (Red Indicator has failed and cannot indicate a failure) | |
| "Communication Module Activation Failed" message is played. | Verify any network problems by calling the Lexus Customer Assistance Center and select prompt for "Lexus Enform with Safety Connect" | - |
| Wait for a while, then move to different location and retry (try to find location with better signal reception) | - | |
| Diagnostic Trouble Code Chart | | |
| "Unable to Connect to the Call Center" or "Unable to Connect to the Emergency Call Center" message is played. | Wait for a while, then move to different location and retry (try to find location with better signal reception) | - |
| Perform Vehicle Inquiry on Techstream and verify subscription status | - | |
| Refer to UNABLE TO CONNECT TO CALL CENTER | | |
| "Safety Connect is not active" message is played. | Perform Vehicle Inquiry on Techstream and verify subscription status | - |
| Explain to the customer that the system is in shipping mode, and confirm whether or not they would like to change to active mode | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Green indicator abnormal (Remains OFF). | Refer to GREEN INDICATOR REMAINS OFF | |
| Red indicator abnormal (Remains ON). | Refer to RED INDICATOR REMAINS ON | |
| Illumination on the manual (SOS) switch panel does not turn on. | Proceed to "Emergency Call Switch Illumination Circuit" | |
| Symptom | Suspected Area | Link |
|---|---|---|
| The operator's voice is wavering/choppy during the emergency call | Set the volume at the default or lower if the customize volume is set to a value larger than the default | |
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Terminals Of Ecu
TERMINALS OF ECU CHECK DCM (TELEMATICS TRANSCEIVER) Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition I183-1 (+B) - I183-20 (E) Y - W-B Power so
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) The DCM (telematics transceiver) control the vehicle safety connect system functions. Safety connect system data and Diagnostic Trouble Codes (DTCs) can be read throug
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Telematics / Trouble
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Initialization has not been Performed (B2450)
DESCRIPTION The vehicle height must be initialized for the headlight ECU sub-assembly LH to perform auto leveling control. DTC No. Detection Item DTC Detection Condition Trouble Area B2450 Initialization has not been Performed
Power switch on (IG)
ECU initialization incompl
Operation Check
OPERATION CHECK INITIAL CHECK (a) Power switch on (IG) (intuitive parking assist system off). (b) Intuitive parking assist system on and check an indication state of the vehicle mark. OK: The initial check is performed for approximately 5 seconds after the system turns on, and then the system switc
