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.
| Symptom | Suspected Area | Link |
|---|---|---|
| Power back door cannot be operated using any switch | Meter / gauge system | |
| Power back door sensor assembly RH | ||
| Power back door sensor assembly LH | ||
| Harness and connector | ||
| Multiplex network door ECU | ||
| Power back door cannot be opened or closed using the combination switch assembly | Combination switch assembly | |
| Harness and connector | ||
| Multiplex network door ECU | ||
| Main body ECU (multiplex network body ECU) | ||
| Power back door cannot be opened or closed using the back door control switch | Back door control switch | |
| Harness and connector | ||
| Multiplex network door ECU | ||
| Power back door cannot be opened using the back door opener switch assembly | Back door opener switch assembly | |
| Harness and connector | ||
| Certification ECU (smart key ECU assembly) | ||
| Multiplex network door ECU | ||
| Power back door cannot be operated using kick sensor (w/ Hands Free Power Back Door) | Harness and connector | |
| Kick door control sensor | ||
| Multiplex network door ECU | ||
| Power back door cannot be operated using kick sensor and back door opener switch (w/ Hands Free Power Back Door) | Smart access system with push-button start (for Entry Function) | |
| Power back door close & lock function does not operate | Door control switch | |
| Harness and connector | ||
| Multiplex network door ECU | ||
| Power back door warning system does not operate | Wireless door lock control system | |
| Harness and connector | ||
| Power back door warning buzzer | ||
| Multiplex network door ECU | ||
| Jam protection function activates during power back door operation | Back door visual check (foreign objects) | |
| Power back door sensor assembly RH | ||
| Power back door sensor assembly LH | ||
| Harness and connector | ||
| Multiplex network door ECU |
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READ NEXT:
Dtc Check / Clear
DTC CHECK / CLEAR CHECK FOR 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: Bod
Terminals Of Ecu
TERMINALS OF ECU CHECK MULTIPLEX NETWORK DOOR ECU (a) Disconnect the Y26 and Y27 multiplex network door ECU connectors. (b) Measure the voltage and resistance according to the value(s) in the table b
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA (a) Whenever a DTC is detected, the multiplex network door ECU stores the current vehicle state as Freeze Frame Data. CHECK FREEZE FRAME DATA (a) Turn the power swi
SEE MORE:
Removal
REMOVAL CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. REMOVE REAR WIPER ARM HEAD CAP Click here 2. REMOVE REAR WIPER ARM AND BLADE ASSEMBLY Click here 3. REMOVE REAR WIPER MOTOR GROMMET Click here
Open in Front Passenger Side Electrical Antenna Circuit (B27A2)
DESCRIPTION The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the front door outside handle assembly (for front passenger door) (electrical key antenna) at intervals of 0.25 seconds. For the front door outside handle assembly (for front passenger d
