B1341
Power Door Unlock Circuit Short To Ground
Body Chassis/Safety Door lock circuit 🟢 Low — Fix at next service
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What This Actually Means
In plain language — no jargon

The power door unlock system has an electrical short to ground, meaning the wire or component is touching the vehicle's metal frame. This is like a water pipe with a hole that's leaking all the water out before it reaches the faucet.

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Symptoms You May Notice
3 known symptoms for this code
Door locks do not unlock when button is pressed
Door unlock relay clicks repeatedly or constantly
Battery drains rapidly due to parasitic draw
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Embedded Systems Insight
What the ECU/ECM is actually computing

The body control module monitors the voltage on the door unlock circuit, expecting specific voltage levels when the unlock relay is activated. If the circuit shorts to ground, voltage drops to near zero, triggering a fault code. The ECU detects this abnormal condition and logs B1341.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Door Unlock Circuit Voltage 12V when relay engaged, 0V at rest Sustained voltage below 1V or continuous ground path detected
Circuit Resistance Greater than 100 ohms Less than 10 ohms (shorted condition)
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Door unlock wiring harness connectors
Inspect connectors at the door latch actuator and body control module for corrosion, moisture, or loose pins that may be causing the short.
2
Door unlock actuator motor
Test the actuator with a multimeter for continuity to ground; if shorted, replace the faulty actuator.
3
Door unlock relay
Swap the relay with a known good unit to confirm if the relay itself is damaged and causing the short circuit.