B1395

Code

Other B — Body

Power Door Memory Lock Relay Circuit Short To Ground

Brand: Other

Type: B — Body

Views: UK: 23 EN: 41 RU: 32

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Damaged or pinched wiring harness (often at door hinge/boot)
Corroded or pushed-out connector terminals
Failed or internally shorted relay
Short to ground in door lock actuator or associated wiring
Water intrusion in connector or door switch area
Aftermarket alarm/remote or improper accessory tap

Symptoms

Memory lock/unlock function does not work
Door locks/unlocks intermittently or only in one state
Clicking or no click from lock relay when commanding memory lock
Blown fuse(s) for door lock/memory circuit
Battery drain when circuit is energized
Diagnostic trouble light or body control warnings

What to check

Scan and record freeze frame and status bits for B1395
Inspect fuses and relay related to door lock/memory circuit
Visual inspection of wiring through door hinge boots and connectors
Back-probe relay control pin with ignition ON and command active
Measure coil supply voltage and resistance of relay
Check continuity to ground on control wire with circuit disconnected

Signal parameters

Battery supply to relay: ~12 V (key ON)
Relay control/BCM output inactive: ~12 V (pulled high) or open depending on design
Relay control/BCM output active: driven to ground or pulled low (~0–1 V) if short is present measured incorrectly
Relay coil resistance typical: manufacturer's spec (often 50–200 ohms); near 0 ohms indicates short
Open-circuit to ground expected when circuit inactive; measured near 0 Ω indicates short to ground

Diagnostic algorithm

Verify the code and any related DTCs. Note when the fault occurred and any user reports.
Inspect fuses and remove/inspect the power door memory lock relay. Replace relay with known-good if suspect.
Perform a visual inspection of harnesses, focusing on door hinge boots, door modules, and common splice points. Look for chafing, pinching, or exposed conductors.
With ignition OFF, disconnect the relay harness connector and check resistance from the relay control pin to chassis ground. A low resistance (near 0 Ω) indicates a short in the wiring or downstream device.
If the circuit is shorted with relay disconnected, isolate by disconnecting connectors along the circuit (door module, actuator) to locate which segment shows continuity to ground.
If harness measures open to ground with relay disconnected, bench-test the relay for internal short. Replace if faulty.
With connectors connected, back-probe the control wire. Command the BCM to operate the memory lock while monitoring voltage. Observe whether the BCM output attempts to drive and whether the voltage collapses to ground.
Wiggle-test the harness while commanding the circuit to reproduce the fault; check for intermittent shorts at the hinge area.
If no wiring short is found, check for faults in BCM outputs using wiring diagram to isolate the module. Repair or replace BCM only after ruling out wiring and load faults.
After repair, clear codes, cycle power, and verify repair by actuating memory lock several times and confirming no reoccurrence of B1395.

Likely causes

Wires chafed at door hinge/boot making contact with body ground
Connector at relay or in door harness contaminated/corroded
Relay coil internally shorted to ground
Door module/actuator wiring shorted by water or damage
Aftermarket device tied into lock circuit creating a short

Fault status

⚠️ Status

BCM detected Power Door Memory Lock relay control circuit shorted to ground. Circuit has abnormally low resistance to chassis ground preventing normal relay operation.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours