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 system 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 area below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Only manual switch does not operate | Tilt and telescopic manual switch circuit | |
| Multiplex tilt and telescopic ECU | | |
| Only auto away/return function does not operate | Check customize status of auto away/return function using the Techstream | |
| IG power source circuit | | |
| Multiplex tilt and telescopic ECU | | |
| Only auto away function does not operate | Smart access system with push-button start (for start function) | |
| Multiplex tilt and telescopic ECU | | |
| Only auto return function does not operate | Smart access system with push-button start (for start function) | |
| Multiplex tilt and telescopic ECU | | |
| Only memory function does not operate | Front power seat control system | |
| Front power seat switch | | |
| Multiplex tilt and telescopic ECU | | |
| Memory call function does not operate | Front power seat control system | |
| Power mirror control system | | |
| Multiplex tilt and telescopic ECU | |
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Terminals Of Ecu
TERMINALS OF ECU MULTIPLEX TILT AND TELESCOPIC ECU *a Component without harness connected (Multiplex Tilt and Telescopic ECU) - - (a) Measure the voltage and resistance according to the v
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) When troubleshooting a vehicle with the diagnostic system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Turn the power switch off. (b) Connect the Techstream to the DLC3. (c) Turn the power switch on (IG). (d) Turn the Techstream on. (e) Enter the following menus: Body El
SEE MORE:
Lost Communication with Main Body ECU (U0140,U0142,U0155,U0293,U1117)
DESCRIPTION These DTCs are stored when there is a CAN communication error between the hybrid vehicle control ECU, certification ECU (smart key ECU assembly), ECM, main body ECU (multiplex network body ECU) or combination meter assembly, and data from the option connector (bus buffer ECU) cannot be r
Power Back Door cannot be Opened or Closed Using the Power Back Door Switch
DESCRIPTION When the power back door cannot be opened or closed using the combination switch assembly, one of the following may be malfunctioning: 1) combination switch assembly circuit, 2) multiplex network door ECU or 3) main body ECU (multiplex network body ECU). WIRING DIAGRAM CAUTION / NOTICE
