B2243

Code

Other B — Body

Driver Rear Door Ajar Circuit Open

Brand: Other

Type: B — Body

Views: UK: 30 EN: 32 RU: 35

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Page language: EN

Read freeze frame and current data with a scan tool; verify DTC and monitor door ajar input state while operating the door
Visually inspect door latch, switch and wiring harness through door jamb for damage, pinch points or corrosion
Wiggle the door wiring harness while watching scan tool input for intermittent changes
Backprobe the door switch connector and BCM connector for voltage and continuity
Perform continuity test between switch pin and BCM input with connectors disconnected and harness isolated
Check for water intrusion or rust in the switch/latch area

Typical switch behavior: closed = continuity (near 0 ohms) to ground or to signal reference; open = very high resistance / open circuit
Expected voltages (vehicle dependent): unlocked/open state often shows battery voltage (~12V) or a pulled-to-ground signal (0V) when closed; consult vehicle wiring diagram
Scan tool parameter: door ajar status should change from OPEN to CLOSED when door is cycled
Noisy or fluctuating signal on the BCM input may indicate intermittent connection or short

Confirm the DTC and note any related codes; record freeze frame data and current door input status with a scan tool.
Reproduce symptom: operate the driver rear door while monitoring the door ajar input. Note whether the input ever registers or is constantly open.
Visually inspect the door latch/switch and harness at the door hinge for chafing, pinched wires, or connector damage. Repair visible damage.
With ignition ON, backprobe the switch connector to verify expected voltage or continuity while opening/closing the door. If no signal, proceed to harness tests.
Disconnect the switch and check continuity between the switch terminal and the BCM terminal. If open, repair wiring (splice, repin, or replace harness as needed).
Check switch operation directly: measure switch resistance with known mechanical actuation or bench-test the latch/switch. Replace switch/latch if it does not change state.
If wiring and switch are good, inspect BCM connector pin and ground for corrosion or poor contact. Verify reference voltage/ground for the input at the BCM.
After repairs, clear codes, cycle the door multiple times, and road test or park for a period to confirm the code does not return.
If all wiring and switch tests pass but circuit still reads open at the BCM, consider BCM fault and consult manufacturer procedures for module testing/replacement.