Have Toyota Questions? Ask a Mechanic for Answers ASAP
Thank you for trusting us with your Toyota questions. What year and model is your vehicle? Do you have access to a digital volt meter?
Ok, more often than not, when we see an issue like this, the lock actuators have failed in the doors not working. You will need a digital volt meter to be certain. One can be found very inexpensively at harbor freight tools if there is one in your area. If the lock actuators are not the cause, we will likely still need this meter to help you check the system. Give me a bit to look up the wiring diagram for your vehicle and see if there is something easy we can check before we have a meter available.
There is nothing separating the operation of these door locks. I have verified that all are controlled through the body computer and share common grounds. So, we will be needing a digital voltmeter to proceed with troubleshooting this issue. You will also need some basic hand tools such as screwdrivers.