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Home / DTC / B2956 — Side latch LH open:open timeout

B2956 — Side latch LH open:open timeout

Detailed page for trouble code B2956.

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Code

B2956

MITSUBISHI B — Body

Side latch LH open:open timeout

Brand: MITSUBISHI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty LH side latch actuator or latch position switch
  • Open or short in wiring or poor connector contact to the latch
  • Mechanical obstruction, corrosion, or binding in the latch mechanism
  • Weak or missing power/ground to latch circuit (blown fuse, relay, BCM output issue)
  • Faulty Body Control Module (BCM) or door control unit
  • Intermittent connection due to corrosion or water ingress

Symptoms

  • Left side door does not open when commanded from inside, key fob, or outside handle
  • Warning message or door-ajar indicator on dash for LH door
  • Repeated DTCs after attempting to open the LH door
  • Intermittent door locking/unlocking on the LH side
  • Audible clicking from latch area or no sound when operating latch

What to check

  • Scan for current and stored codes; note freeze-frame and operating conditions
  • Operate LH side door while monitoring latch status with a scan tool (live data) if available
  • Visually inspect LH door latch, linkages, and surrounding area for damage, debris, or rust
  • Check fuses/relays related to door locks and body control circuits
  • Inspect wiring and connector at the LH door latch for corrosion, bent pins, or broken wires (pay attention to flex area)
  • Listen for actuator operation when attempting to open/lock/unlock

Signal parameters

  • Latch position switch: should change state (open/closed) when latch moves; monitor as binary ON/OFF on scan tool
  • Actuator supply: approx. battery voltage present at actuator connector when commanded (should switch between ground and +12V depending on design)
  • Resistance: motor/solenoid coil continuity (typical low ohms) — expect a finite low resistance, not open or infinite
  • Ground integrity: chassis ground at door and BCM ground should be low resistance
  • No excessive voltage drop on command circuit during operation

Diagnostic algorithm

  1. Retrieve DTC and relevant freeze-frame/last-activation data with a scan tool. Clear the code and repeat the operation to verify repeatability.
  2. Attempt to open/operate the LH door while watching live data for latch position and actuator command. Note whether the module issues a command and whether the latch changes state.
  3. Perform a visual inspection of the LH latch, linkage, and striker for obstructions, damage, or corrosion. Lubricate moving parts if dry and remove any debris.
  4. Inspect the latch connector and wiring harness for corrosion, bent pins, or broken wires; flex the door harness while watching live data or continuity to detect intermittent faults.
  5. With vehicle battery connected and safety precautions observed, measure voltage at the latch connector while commanding open/lock. Verify proper supply and switching behaviour.
  6. Check continuity between the latch switch terminals and the BCM/door module. Repair any damaged wiring or connectors found.
  7. If electrical supply and signals are correct but the latch does not operate, remove the latch assembly and bench-test or replace the latch/actuator assembly.
  8. After repair or replacement, clear codes and perform multiple open/close cycles and a road or operation test to confirm the fault is resolved.
  9. If wiring and latch are good but commands are not issued, investigate the BCM/door control unit for software faults or internal failure; consult manufacturer procedures for module testing/reprogramming.

Likely causes

  • Corroded/loose connector at the LH door latch
  • Stuck or seized latch mechanism (dirt, rust, foreign object)
  • Failed latch motor/actuator or broken internal switch
  • Damaged wiring harness at the door hinge area where it flexes

Fault status

⚠️ Status
LH side latch failed to register as open within the timeout period after an open command. Indicates possible latch actuator failure, wiring/connector issue, mechanical obstruction, or controller output fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2955 B2957 B2958 B2959 B2900
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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