If there are no external door lock switches you will most likely have a vacuum type system or an aftermarket door lock system with relays or have an added actuator that needs relays.
Power door lock circuit.
The b1310 code is a generic obd ii trouble code that detects a circuit malfunction with the power door unlock system.
Power door lock harness is open or shorted.
Locate the harness plugged directly into the back of the door lock switch.
What the officer is doing with the metal strip is fishing around until he or she hooks onto the point that the knob and actuator connect to.
Check the fuses and circuit breakers especially if none of the power door locks work.
How to troubleshoot electric door locks step 1.
Vehicles have one door unlock system that controls all of the door locks as well as the trunk lock so the b1310 code applies to all of the vehicle s locks.
A quick pull on this point and the door is unlocked.
Activate the power lock switch to its lock and unlock positions while listening for a distinctive click sound.
Power door lock circuit poor electrical connection.