Code
C1923
MITSUBISHI
C — Chassis
Acceleration sensor,Tire2
Views:
UK: 19
EN: 44
RU: 21
AI status
Completed
Completed
100%
Causes
- Open or short in sensor power, ground or signal wiring to Tire 2 sensor
- Corroded, loose or contaminated connector at the sensor
- Faulty acceleration sensor (internal electronics failure)
- Poor sensor mounting or physical damage to the sensor
- Intermittent supply voltage or poor ground at sensor
- Fault in ABS/ECU/ESP control module or software
Symptoms
- ABS, Traction Control or Stability Control warning lamp illuminated
- Reduced or disabled ESC/traction control function
- Diagnostic trouble code C1923 stored in ABS/ESP module
- Possible inconsistent or erratic wheel/accel readings in live data
- Vehicle handling may feel different under braking or cornering
What to check
- Read trouble codes and freeze-frame data with a capable scan tool
- Check live sensor data for Tire 2 and compare with other wheel/accel sensors
- Visually inspect sensor and connector for damage, contamination or corrosion
- Inspect wiring harness along routing for chafing, pinches or breaks
- Measure supply voltage and ground at sensor connector with key on
- Perform continuity/resistance checks between sensor connector and ABS/ESP module
Signal parameters
- Sensor supply: typically 5 V or 3.3 V reference (confirm with service manual)
- Signal type: analog voltage or digital frequency/serial output depending on design
- Idle/rest output: approx mid-rail voltage for analog accelerometers (e.g. ~2.5 V) — varies by sensor
- Dynamic response: voltage or data value changes with vehicle acceleration/impact
- Expected continuity: low resistance to ground for ground circuit; open/short indicates fault
Diagnostic algorithm
- Connect a diagnostic scanner, record all stored codes and freeze-frame data; note any related codes.
- Attempt to clear the code and perform a short road test while monitoring live data to see if the code returns and whether the sensor output responds to acceleration.
- Visually inspect the Tire 2 sensor, mounting, and connector. Look for corrosion, water ingress, loose mounting bolts, or physical damage.
- With ignition on (engine off), back-probe the sensor connector and measure supply voltage and ground reference. Verify signals change when the vehicle is moved or wheel is rotated (per service manual procedures).
- Check continuity/resistance of wiring between sensor connector and ABS/ESP control module; repair any opens or shorts.
- Wiggle wiring harness and connectors while monitoring live data to identify intermittent faults.
- If wiring and connectors are good, compare the sensor’s readings to the same-type sensor on another corner. If available and compatible, swap sensors between positions to see if the fault follows the sensor.
- Update ABS/ESP module software if a TSB or update applies.
- Replace the acceleration sensor if testing indicates out-of-spec or if fault follows the sensor. After repair, clear codes and verify proper operation on road test and with live-data checks.
- If issue persists after sensor replacement and wiring checks, consult manufacturer service information for advanced diagnostics of the ABS/ESP module.
Likely causes
- Damaged wiring harness or pin pushed out at sensor connector
- Sensor connector contaminated with corrosion or moisture
- Failed acceleration sensor
- Loose or corroded ground connection near sensor
- Faulty ABS/ESP control unit (less common)
Fault status
Status
Acceleration sensor (Tire 2) fault — sensor circuit or sensor malfunction detected by ABS/ESP system.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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Repair manuals
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