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Home / DTC / B294D — Down latch RH open:close cycle

B294D — Down latch RH open:close cycle

Detailed page for trouble code B294D.

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22,491specific
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Code

B294D

MITSUBISHI B — Body

Down latch RH open:close cycle

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

Causes

  • Broken, chafed, or corroded wiring or connector to the RH latch sensor/actuator
  • Poor ground or loose power supply to the latch motor/sensor
  • Faulty latch position sensor (switch) or actuator motor
  • Mechanical binding, foreign object, or misalignment in the latch assembly
  • Water intrusion or corrosion in latch connector or mechanism
  • Faulty body control module (BCM) or erroneous input processing

Symptoms

  • RH door may not lock/unlock or may toggle between open and closed states
  • Interior/door ajar warning lamp or message for RH door
  • Automatic closing/opening cycle fails or repeats unexpectedly
  • Erratic behavior of power door/lock operation on RH side
  • DTC B294D stored in BCM and may reappear after clearing

What to check

  • Read and record all related DTCs and freeze-frame data with a diagnostic scanner
  • Visually inspect RH door latch and wiring harness for damage, corrosion, or water entry
  • Operate the RH latch while watching live data for latch position or switch status
  • Wiggle test wiring and connectors while monitoring latch signal for intermittent changes
  • Check battery voltage and engine/ignition supply to the BCM and latch circuit
  • Check grounds at door and body for continuity and cleanliness

Signal parameters

  • Latch position switch: typically a binary or pulsed signal (closed = ~0 V or ground, open = ~12 V or open circuit depending on vehicle)
  • Actuator motor supply: battery voltage (~11–14 V when engine running)
  • Signal behavior during normal operation: single stable transition open→closed when latch operated; no rapid oscillation
  • Expected resistance of position switch: manufacturer-specific (check service manual) — often near 0 Ω (closed) and OL (open)
  • Monitoring: watch for rapid toggling, bouncing, or intermittent loss of signal during operation

Diagnostic algorithm

  1. Connect a diagnostic scanner, read and record DTC B294D and any related codes; note freeze frame and attempt to reproduce the fault with the scanner connected.
  2. Visually inspect the RH door latch assembly, harness, and connector for damage, corrosion, loose pins, or water ingress. Repair any obvious damage.
  3. With connector disconnected, inspect pins for corrosion, bent terminals, or water. Clean and apply dielectric grease if required, then reconnect securely.
  4. Using a multimeter, check for proper battery voltage at the latch power supply terminal with the ignition on. Verify a good ground at the latch ground terminal.
  5. Monitor the latch position switch signal with an oscilloscope or scanner live data while operating the latch manually and with power: verify a single stable transition and no rapid open/close cycling.
  6. Wiggle the harness and connectors while observing the live signal to identify intermittent wiring faults. Repair or replace damaged sections and secure connectors.
  7. If wiring and connectors check good, bench-test or replace the latch actuator/position switch. Re-test operation and monitor for return of the code.
  8. If latch and wiring are good and symptoms continue, check BCM inputs and grounds. Perform resistance/continuity checks from the BCM connector to the latch connector.
  9. As a last step, consider BCM diagnostics or replacement only after exhaustively verifying wiring and latch hardware; consult manufacturer procedures for module programming/replacement.
  10. After repairs, clear codes and verify operation over several open/close cycles and a short road test or repeat activation until confident the fault does not recur.

Likely causes

  • Damaged wiring harness to RH latch (most common)
  • Corroded or loose connector at the RH door latch
  • Faulty latch position switch or encoder
  • Latch binding due to mechanical damage or debris
  • Intermittent ground at latch or BCM

Fault status

⚠️ Status
RH down latch open/close cycle abnormal — latch position signal is cycling or not stable during operation.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B294A B294B B294C B2950 B2920
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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