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 |
|---|---|---|
| Vehicle status cannot be checked using the application. | Proceed to "Remote Service Malfunction" | |
| Vehicle status alerts are not received by the application even if remote notification operation conditions are met. | Proceed to "Remote Service Malfunction" | |
| Vehicle cannot be operated remotely using the application. | Perform remote door lock and unlock registration and check if the problem symptom recurs | |
| Proceed to "Remote Service Malfunction" | |
| Symptom | Suspected Area | Link |
|---|---|---|
| Hybrid control system does not start by remote engine start function. | Proceed to "Remote Engine Starter does not Operate" | |
| Hybrid control system does not stop by remote engine stop function. | Proceed to "Remote Engine Starter does not Operate" | |
| Symptom | Suspected Area | Link |
|---|---|---|
| The multi-display assembly screen does not show a warning message even though a warning light turns on or the multi-information display indicates a warning. | Proceed to "Warning Notification Function Malfunction" | |
| The multi-display assembly screen shows a warning message even though no warning lights are on and the multi-information display does not indicate a warning. | Proceed to "Warning Notification Function Malfunction" | |
| The multi-display assembly screen shows a warning message different from the warning light or the multi-information display. | Proceed to "Warning Notification Function Malfunction" | |
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Terminals Of Ecu
TERMINALS OF ECU DCM (TELEMATICS TRANSCEIVER) Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition I183-1 (+B) - I183-20 (E) Y - W-B Power source (
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
Data List / Active Test
DATA LIST / ACTIVE TEST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faul
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Terminals Of Ecu
TERMINALS OF ECU CLEARANCE WARNING ECU ASSEMBLY (a) Disconnect the I20 clearance warning ECU assembly connector. (b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description C
Additional Key cannot be Registered
DESCRIPTION If additional registration is not possible, a malfunction in the electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly), power switch, No. 2 indoor electrical key antenna assembly (front floor), steering lock ECU (steering lock actuator assembly) or door cont
