What Does B2274 Mean?
DTC B2274 indicates the Body Control Module (BCM) has detected an electrical fault in the power window motor control circuit. This code is set when the BCM identifies abnormal voltage, current draw, resistance, or communication issues within the window motor circuit, including the motor itself, wiring harness, control switches, or BCM output driver. The system may disable power window operation on the affected window to prevent component damage.
Common Causes
40%
Failed or binding power window motor with increased current draw or internal short/open circuit
30%
Damaged wiring harness, corroded connectors, or broken wires between BCM and window motor
20%
Faulty window switch with internal contact failure or short circuit
10%
Failed BCM output driver circuit or internal BCM fault
Diagnostic Steps
1
Step 1: Perform visual inspection of window motor connector, door harness, and all associated wiring for obvious damage, corrosion, water intrusion, or loose connections. Inspect window regulator for binding or mechanical obstruction.
2
Step 2: Using a multimeter, test window motor operation by applying direct 12V power and ground to motor terminals (bypassing control circuit). Motor should operate smoothly in both directions without excessive current draw (typically 3-8 amps under no load).
3
Step 3: With ignition on, use multimeter to check for proper voltage supply (typically 12V) at window motor connector during switch activation. Check ground circuit continuity to chassis ground (should be less than 0.5 ohms resistance).
4
Step 4: Test window switch operation by measuring continuity and resistance through switch contacts in all positions. Verify proper voltage output from switch terminals during activation.
5
Step 5: Check BCM connector terminals for corrosion or damage. Measure resistance of wiring harness between BCM and window motor (should be less than 5 ohms). Check for short to ground or short to power in harness.
6
Step 6: If all previous tests pass, suspect BCM internal driver fault. Monitor live data for window motor command signals from BCM during switch activation. Verify BCM software is up to date and consider BCM replacement if output driver is confirmed failed.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
DTC B2274 indicates the Body Control Module (BCM) has detected an electrical fault in the power window motor control circuit. This code is set when the BCM identifies abnormal voltage, current draw, resistance, or communication issues within the window motor circuit, including the motor itself, wiri...
The most common cause of B2274 (Window Motor Control Circuit) is: Failed or binding power window motor with increased current draw or internal short/open circuit
Typical repair costs for B2274 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive with this code as it only affects power window operation convenience. However, if a window is stuck in the down position, it poses security and weather protection concerns that should be addressed promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2274 to identify the root cause.
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Quick Info
Category
Body
System
Body Electrical System
Difficulty
Type
Generic (SAE)
Recommended Tools
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