Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
If the multiplex network door ECU has been removed and installed or replaced, or if any of the connectors have been disconnected, initialize the power back door system.
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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 LH | ||
| Power back door sensor assembly RH | ||
| Wire harness and connector | ||
| Multiplex network door ECU | ||
| Power back door does not operate using the cabin switch | Power back door switch (integration control and panel assembly) | |
| Wire harness and connector | ||
| Multiplex network door ECU | ||
| Main body ECU (multiplex network body ECU) | ||
| Power back door does not operate outside switch | Back door control switch | |
| Wire harness and connector | ||
| Multiplex network door ECU | ||
| Power back door cannot be opened using the back door opener switch assembly (open switch) (back door entry unlock function is normally) | Multiplex network door ECU | |
| Power back door cannot be operated using kick sensor* | Wire 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* | Smart access system (for Entry Function) | |
| Power back door close and lock function does not operate | Door control switch | |
| Wire harness and connector | ||
| Multiplex network door ECU | ||
| Back door closer does not operate | Back door visual check (foreign objects) | |
| Back door lock assembly | ||
| Wire harness and connector | ||
| Multiplex network door ECU | ||
| The back door closer does not reverse rotation operation properly when the back door opener switch assembly (open switch) is operated (during the back door closer operation). | Smart access system (for Entry Function) | |
| Multiplex network door ECU | | |
| Power back door warning system does not operate | Wireless door lock control system | |
| Wire 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 unit assembly set LH | ||
| Power back door unit assembly set RH | ||
| Power back door sensor assembly LH | ||
| Power back door sensor assembly RH | ||
| Wire harness and connector | ||
| Multiplex network door ECU |
- *: w/ Hands Free Power Back Door
Initialization
INITIALIZATION INITIALIZE MULTIPLEX NETWORK DOOR ECU NOTICE: Initialization of the multiplex network door ECU (back door initial position learning) is necessary if any of the following have been perfo ...
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Back Door / Trouble ...
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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