C1606

Code

MITSUBISHI C — Chassis

Yaw Rate Sensor Circuit Malfunction

Brand: MITSUBISHI

Type: C — Chassis

Views: UK: 14 EN: 24 RU: 15

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Page language: EN

Causes

Open, shorted or corroded wiring/connectors between ECU and yaw rate sensor
Faulty yaw rate (yaw-rate/gyroscope) sensor
Poor or intermittent sensor ground or reference voltage
CAN/LIN/communication faults or ECU software/firmware issues
Water intrusion or physical damage to sensor
Aftermarket electronics or recent repairs that disturbed wiring

Symptoms

ABS, ESC, VSC, or traction control warning light illuminated
Stability control/traction intervention disabled messages
Loss of vehicle stability/traction control functions
Diagnostic trouble codes stored (C1606 and possibly related codes)
Occasional poor handling or unexpected traction control behavior
Possible sensor error logged only under certain road/temperature conditions

What to check

Read all stored and pending codes and freeze frame data with a capable scan tool
Inspect sensor and harness for damage, corrosion, water entry and secure mounting
Check connector pins for bent pins, corrosion, or intrusion of moisture
Measure reference supply voltage and ground at the sensor connector (with key on) per factory values
Back-probe sensor output while monitoring live data on a scan tool to observe yaw rate signal at rest and during yaw
Perform wiggle test on wiring while monitoring output for intermittent faults

Signal parameters

Typical supply/reference: ~5 V reference (verify factory spec for model)
Typical sensor ground: near 0 V (good chassis ground required)
At rest output: approx. mid-supply (e.g., ~2.5 V) for bipolar sensors — varies by model; verify exact value
Output response: changes proportional to yaw rate (mV/deg/s or V per deg/sec) — should be stable at rest and change smoothly with rotation
CAN message: yaw rate data may be broadcast on vehicle bus at ~10–100 Hz depending on vehicle
Resistance/continuity: wiring resistance should be low and consistent; no short to battery or ground

Diagnostic algorithm

Connect OEM-level scan tool. Record C1606 plus any related codes and live data (yaw rate, steering angle, wheel speeds).
Inspect sensor mounting location and wiring harness for visible damage, corrosion, moisture or loose connectors.
With key ON (engine off), back-probe the sensor connector: verify reference voltage, ground continuity, and sensor output voltage at rest; compare to factory spec.
Monitor live yaw-rate signal while slowly rotating vehicle on jack stands or performing gentle yaw maneuvers (safe, controlled) — signal should change smoothly and correlate with steering/wheel speed data.
Perform wiggle test on wiring and connectors while observing live data for intermittent drops or noise.
If supply or ground is missing or out of spec, trace and repair wiring/grounding. Repair pins/connectors as needed, then retest.
If wiring and power are good but signal is out of range/erratic, replace the yaw rate sensor and retest.
If replacement sensor does not clear the fault, inspect/repair CAN bus wiring, check ABS/ESP ECU grounds and voltages, and consider ECU fault or software update.
After repair, clear codes and perform test drive with scan tool connected to verify code does not return and stability systems operate normally.
If intermittent or unresolved, consult manufacturer service information and wiring diagrams for component-level checks and consider professional calibration procedures if required.

Likely causes

Loose, corroded or disconnected harness connector at the sensor
Damaged wiring (chafing, pinched, rodent damage) causing intermittent open/short
Failed yaw rate sensor (internal MEMS/accelerometer failure)
Sensor ground or 5 V reference supply fault
Faulty ABS/ESP control unit or CAN bus fault (less common)

Fault status

⚠️ Status

Yaw Rate Sensor Circuit Malfunction — sensor signal invalid, out of expected range, intermittent, open or short. May disable stability/traction control systems until corrected.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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C1606 — Yaw Rate Sensor Circuit Malfunction