The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing troubleshooting, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*
*: w/ Door Control Battery
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 |
|---|---|---|
| Wireless control function and entry function do not operate | Lighting system (Int) (Front door courtesy switch circuit) | |
| Lighting system (Int) (Rear door courtesy switch circuit) | ||
| Power door lock control system | ||
| Check for DTCs | ||
| B code registration failed | ||
| Wave interference | ||
| Check connector connection condition | ||
| Electrical key transmitter sub-assembly | ||
| Transmitter battery | ||
| Door control receiver | ||
| Certification ECU (Smart key ECU assembly) | ||
| Wire harness or connector | ||
| Main body ECU (Multiplex network body ECU) | ||
| Wireless control function does not operate but entry function operates | Electrical key transmitter sub-assembly | - |
| Only answer-back function does not operate properly | Check customize setting | |
| Perform operation check | ||
| Lighting system (Int) (Door unlock detection switch circuit) | ||
| Lighting system (Ext) (Hazard warning switch circuit) | ||
| Wire harness or connector | ||
| Main body ECU (Multiplex network body ECU) | ||
| Instrument panel junction block assembly | ||
| Wireless door lock buzzer*1 | ||
| Only automatic lock function does not operate properly | Perform operation check | |
| Lighting system (Int) (Front door courtesy switch circuit) | ||
| Lighting system (Int) (Rear door courtesy switch circuit) | ||
| Main body ECU (Multiplex network body ECU) | - | |
| Only illuminated entry function does not operate | Perform operation check | |
| Lighting system (Int) | ||
| Main body ECU (Multiplex network body ECU) | - | |
| Only door ajar warning buzzer function does not operate | Wireless door lock buzzer | |
| Only panic alarm function does not operate*2 | Perform operation check | |
| Lighting system (Ext) (Hazard warning lights) | ||
| Theft deterrent system (Vehicle horns, Security horn) | ||
| Main body ECU (Multiplex network body ECU) | - | |
| When returning to the vehicle, although door unlock operation was not performed, doors were in an unlocked state. | Power door lock control system | |
| When returning to the vehicle, although door lock operation was not performed, doors were in a locked state. | Power door lock control system |
*1: w/ Wireless Door Lock Buzzer Answer-back Function
*2: w/ Panic Function