Note
The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before proceeding with troubleshooting, perform an on-vehicle inspection and confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*
*: w/o Canister Pump Module with Door Ajar Warning Buzzer Function
Tech Tips
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 | Proceed to "All Door Entry Lock / Unlock Functions and Wireless Functions do not Operate" | |
| Wireless control function does not operate but entry function operates | Electrical key transmitter sub-assembly | - |
| Only answer-back function does not operate properly | Proceed to "No Answer-Back" | |
| Only automatic lock function does not operate properly | Perform operation check | |
| Lighting system (Int) (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*1 | 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) | ||
| Main body ECU (Multiplex network body ECU) | - |
*1: w/ Door Ajar Warning Buzzer Function
*2: w/ Panic Function