B2933

Code

Generic B — Body

Right rear door lock actuator circuit fault

Brand: Generic

Type: B — Body

Views: UK: 12 EN: 22 RU: 20

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or short in the right rear door lock actuator wiring harness (power or ground)
Corroded, loose or damaged connector at the door lock actuator
Failed right rear door lock actuator (motor or internal switch)
Faulty door latch assembly or mechanical jam preventing movement
Blown fuse or faulty relay supplying door lock circuit
Faulty body control module / door control module or software fault

Symptoms

Right rear door does not lock or unlock with key fob, interior/exterior switch, or auto-lock
Intermittent operation: sometimes works, sometimes not
Audible clicking or no sound from the actuator when commanded
Other doors operate normally
Possible blown fuse for door lock circuit
Related warning message or door ajar indicator (vehicle dependent)

What to check

Retrieve and record freeze frame and history with a scan tool; clear code and attempt to re-create fault
Visually inspect right rear door wiring, connector, and door boot for damage, corrosion, or pin deformation
Check for blown fuses and condition of any door lock relays
Attempt to actuate the right rear lock with a scan tool while observing connector and actuator
Backprobe the actuator connector while commanding lock/unlock to observe voltage and ground
Wiggle test wiring through full door opening range to check for intermittent faults

Signal parameters

Expected battery voltage at actuator when commanded: ~10–14 V (vehicle battery voltage under load)
Ground should be solid (near 0 V) when commanded to actuate
Actuator coil resistance typically low (varies by manufacturer; commonly ~10–100 Ω) — consult vehicle-specific data
Current draw when operating: typically up to a few amps; a stalled motor will draw higher current
Command duration: brief pulse or hold time from BCM during lock/unlock (vehicle dependent)

Diagnostic algorithm

Connect a scan tool and read all body/control module codes; note freeze frame data and related door codes
Clear the code and perform a functional test: command right rear lock/unlock from scan tool while observing behavior
Visually inspect right rear door interior trim, actuator connector and wiring boot for physical damage, corrosion, or foreign material
Backprobe the actuator connector at the door with the harness connected, then command lock/unlock and observe voltages on power and ground circuits
Perform a wiggle test on the wiring through the full door opening range to find intermittent breaks; monitor voltage while wiggling
If voltage/ground are present and correct when commanded but actuator does not move, remove and bench-test the actuator (apply 12 V/ground) or swap with a same-type working actuator to confirm failure
If no voltage present at the actuator connector when commanded, trace wiring back to the BCM: check connector pins, continuity to the module, and for shorts to ground or battery using an ohmmeter and powerprobe as required
Inspect and test fuses/relays that supply the door lock circuit; replace if faulty
If wiring and actuator check good but code returns and BCM outputs are suspect, consult vehicle-specific module diagnostics; consider reprogramming or replacing the BCM/door module only after electrical verification
After repair, clear codes and verify proper operation through multiple cycles and full door travel; monitor for reappearance of the fault

Likely causes

Damaged/loose connector at the right rear door actuator
Failed/right rear actuator motor or internal switch
Wiring chafed at the door hinge/boot causing intermittent open/short
Corrosion or water in the connector

Fault status

⚠️ Status

Right rear door lock actuator circuit fault detected — electrical open/short/intermittent; inspect wiring, connector, actuator, fuses and door module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours