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Home / DTC / B1314 — Timeout error (TN panel close)

B1314 — Timeout error (TN panel close)

Detailed page for trouble code B1314.

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Code

B1314

MITSUBISHI B — Body

Timeout error (TN panel close)

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

Causes

  • Mechanical obstruction or binding in the sunroof/pan panel tracks
  • Failed or weak sunroof motor or regulator
  • Faulty close-limit switch or position sensor
  • Damaged wiring, poor connector contact, or open/short in motor circuit
  • Insufficient battery voltage or poor ground during operation
  • Faulty sunroof control module or BCM (communication/timeout logic)

Symptoms

  • Sunroof/TN panel fails to fully close or stops before fully closed
  • Sunroof takes unusually long to close or operation times out
  • DTC B1314 stored in body/sunroof module and possibly a warning light/message
  • Intermittent operation or only partial movement from the panel
  • Possible unusual noise during attempted close (grinding, stalling)

What to check

  • Retrieve all stored DTCs and freeze frame data with a scan tool; note conditions when fault set
  • Attempt to operate the panel while watching/feeling for binding, noises or obstructions
  • Visually inspect tracks, drain channels, seals and sliding mechanisms for debris or damage
  • Inspect fuses, relays, and ground connections related to the sunroof circuit
  • Check connectors at the sunroof motor, switch assembly and control module for corrosion, looseness or bent pins
  • Measure battery voltage at rest and during an attempt to close the panel

Signal parameters

  • Motor supply voltage during close command: typically battery voltage (11–14 V); significant drop indicates high current draw
  • Motor current draw: normal run current (manufacturer-specific), high/stall current indicates binding or failed gears
  • Switch input voltage: toggle switch should change signal state (0/5 V or ground depending on design)
  • Limit switch/position sensor feedback: closed/open or position counts expected when fully closed
  • Timeout duration: module close timeout threshold (manufacturer-specific) — fault set if exceeded
  • CAN/Serial messages: sunroof module reports commands and status to BCM (check for communication faults)

Diagnostic algorithm

  1. Read and record all DTCs and freeze-frame data. Clear codes and attempt to reproduce the fault under the same conditions.
  2. Visually inspect the sunroof/panel path for obstructions, debris, damaged seals or foreign objects. Manually move the panel (if safe) to confirm free travel.
  3. Check related fuses and grounds. Wiggle connectors at motor, switch and module while actuating to check for intermittent faults.
  4. With scan tool, command the panel closed and observe module inputs/outputs. Note if the module issues the close command and whether any feedback is received.
  5. Measure voltage at the motor connector during a close command. If voltage is present but motor does not run or stalls, measure motor current to detect overload or stall.
  6. If motor current is excessive or motor does not run, remove motor/regulator assembly for bench testing. Confirm motor runs freely on bench and that gear train is intact.
  7. Test limit switches/position sensors for correct operation/continuity during travel. Replace if they fail to signal the closed position.
  8. Repair any damaged wiring, connectors, or grounds found. Replace motor/regulator or switch if testing indicates failure.
  9. After repairs, perform module initialization/calibration procedure if required by manufacturer. Re-scan for codes and verify full, repeatable operation.
  10. If all mechanical and electrical checks pass but fault persists, consider suspect control module and verify CAN/communication; replace module only after ruling out wiring and mechanical causes.

Likely causes

  • Obstruction or heavy binding in the panel tracks
  • Sunroof motor drawing excessive current or slipping (motor/gear wear)
  • Intermittent connector or damaged harness to the motor/switch
  • Faulty close limit switch or position sensor not reporting travel complete

Fault status

⚠️ Status
Timeout while closing TN panel — close operation exceeded allowed time; check motor, tracks, switches, and wiring.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1310 B1315 B1300 B1250 B1320
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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