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Home / DTC / B1617 — Roll rate sensor failure

B1617 — Roll rate sensor failure

Detailed page for trouble code B1617.

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Code

B1617

MITSUBISHI B — Body

Roll rate sensor failure

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

Causes

  • Roll-rate sensor internal failure
  • Open, short, or high-resistance wiring between sensor and ECU
  • Poor power supply or ground to the sensor
  • Corroded or loose connector pins
  • Water ingress or physical damage to sensor
  • ECU communication fault or internal ECU failure

Symptoms

  • ABS / VDC / traction/stability control warning lamp(s) illuminated
  • Vehicle stability/traction control functions disabled or limited
  • Possible disabling of other safety features tied to roll detection (e.g., rollover mitigation)
  • No drivability symptoms in many cases, but system may go into reduced functionality
  • Diagnostic trouble code B1617 stored in ECU

What to check

  • Connect a scan tool and read stored DTCs and freeze frame data; note any related codes
  • View live data for the roll-rate sensor value and compare to expected behavior during slow turns or road test
  • Visually inspect the sensor and harness for corrosion, water entry, damage, or pin deformation
  • Backprobe sensor connector: verify reference supply voltage and ground with ignition ON
  • Check continuity/resistance of wiring between sensor connector and ECU pins; inspect for shorts to chassis or battery
  • Check for recent battery disconnects, module replacement or failed calibration events in service history

Signal parameters

  • Sensor usually produces a zero-rate bias (mid-supply voltage) at rest and deviates proportionally with roll rate (degrees/sec)
  • Expected idle voltage: approx. mid-supply (varies by vehicle) — verify against factory data
  • Output range: typically ±several hundred °/s; values should change smoothly with vehicle roll/tilt or during turns
  • Update rate: frequent (tens to hundreds of Hz) — live-data should update continuously
  • A stuck, noisy, out-of-range, or no-communication signal indicates a sensor/circuit fault

Diagnostic algorithm

  1. Connect professional scan tool, record DTCs and freeze frame; note any other body/control module codes.
  2. Inspect sensor location, mounting, and connector for physical damage, moisture, corrosion, or loose fasteners.
  3. With ignition ON (engine off), backprobe sensor connector: verify reference voltage and good ground per factory spec. If no power/ground, trace/repair supply and ground circuits.
  4. With scan tool live-data, observe roll-rate output at rest and while performing slow turns or a short road test. A healthy sensor shows near-zero at rest and smooth proportional changes during turns.
  5. If signal absent/noisy: check continuity and resistance of signal, power and ground wires to ECU. Repair any opens/shorts. Re-check live data.
  6. If wiring and supply are good but signal is out-of-range or inconsistent, replace the roll-rate sensor per service manual.
  7. After replacement/repair, clear codes and perform required initialization/calibration procedures for stability/roll sensors (follow manufacturer procedure).
  8. Road test to confirm stable sensor readings and that warning lamps do not return. Re-scan for codes.

Likely causes

  • Corroded connector at the sensor or harness chafe causing intermittent circuit
  • Sensor damaged by impact or exposure to water/road debris
  • Battery disconnected or control module replaced without performing sensor initialization
  • Shorted signal wire to ground or battery feed due to harness rubbing on chassis
  • Faulty sensor module (age or manufacturing defect)

Fault status

⚠️ Status
Roll rate sensor signal fault — out of range / open / communication error
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B1601 B1616 B1618 B1620 B1690
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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