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Home / DTC / B1072 — R.air outlet DMPR.potentio.low

B1072 — R.air outlet DMPR.potentio.low

Detailed page for trouble code B1072.

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Code

B1072

MITSUBISHI B — Body

R.air outlet DMPR.potentio.low

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

Causes

  • Open or shorted wiring between right damper potentiometer and HVAC control module
  • Corroded, loose or damaged connector at the damper actuator
  • Failed potentiometer inside the right air outlet damper actuator
  • Damper actuator or linkage mechanically stuck or damaged
  • Blown fuse or intermittent power/ground to actuator reference circuit
  • Faulty HVAC control module input (rare)

Symptoms

  • Right-side vent airflow not responding or stuck in one position
  • HVAC mode/airflow direction incorrect on passenger side
  • DTC B1072 stored in body/HVAC control module
  • Intermittent damper movement or inconsistent vent position
  • No other driveability symptoms (engine runs normally)

What to check

  • Read and record DTCs and live data from HVAC/body control module
  • Visually inspect damper actuator connector and wiring for damage, corrosion, or pin push-out
  • Check fuse(s) related to HVAC/actuator power and ground
  • Backprobe potentiometer connector to verify reference voltage, ground, and signal
  • Operate HVAC mode and watch live sensor value while moving damper or commanding actuator
  • Perform wiggle test on harness to reproduce fault

Signal parameters

  • Reference (supply) voltage to potentiometer: typically ~5 V (check factory spec)
  • Potentiometer output (signal) voltage: varies with damper position, commonly ~0.5 V (closed) to ~4.5 V (open)
  • Low-signal trip: output significantly below expected minimum (for example
  • Ground continuity: near 0 Ω between sensor ground and chassis ground

Diagnostic algorithm

  1. Connect a scan tool. Read and record DTC(s) and freeze frame / live data for the right damper potentiometer.
  2. Visually inspect the right damper actuator, connector, and wiring for physical damage, corrosion, rodent nibbling, or pin damage. Repair as needed.
  3. With ignition ON (engine off if specified), backprobe the actuator connector. Verify reference voltage (usually ~5 V) and ground presence at the connector pins.
  4. Command the HVAC mode/air outlet to change while watching the potentiometer signal on the scan tool. Observe whether the signal changes smoothly through its voltage range.
  5. If signal is stuck low or absent, measure signal voltage at connector while operating the actuator manually (if accessible) or moving the damper linkage. If signal stays low, suspect wiring short/open or failed potentiometer.
  6. Check continuity and resistance of the signal and ground wires between the actuator connector and the HVAC control module. Repair any short or open circuits.
  7. If wiring and connectors are good but the potentiometer output is abnormal, remove and bench-test or replace the right damper actuator (potentiometer).
  8. After repair or replacement, clear codes and verify proper operation and that the code does not return.
  9. If code persists with good wiring and a known-good actuator, suspect HVAC control module input fault and refer to manufacturer's service procedures.

Likely causes

  • Corroded/loose connector at damper actuator
  • Short to ground or open circuit in harness to potentiometer
  • Internal failure of the damper potentiometer/actuator
  • Mechanical binding preventing proper potentiometer movement

Fault status

⚠️ Status
Right air outlet damper potentiometer circuit — low voltage (B1072)
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1070 B1071 B1073 B1062
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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