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Home / DTC / B1B76 — Side impact sensor(RH) 2

B1B76 — Side impact sensor(RH) 2

Detailed page for trouble code B1B76.

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Code

B1B76

MITSUBISHI B — Body

Side impact sensor(RH) 2

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

Causes

  • Failed or degraded side impact sensor (RH) #2
  • Open, short or high resistance in the sensor wiring harness
  • Poor or corroded connector/terminal at the sensor or control unit
  • Water ingress or physical damage to the sensor or connector
  • Poor electrical ground or reference voltage to the sensor
  • Faulty SRS / airbag control module (less common)

Symptoms

  • SRS / airbag warning lamp illuminated or flashing
  • SRS system may be disabled or certain airbags inhibited
  • Vehicle may not pass safety inspection while code is present
  • Possible stored related crash-data or multiple SRS fault codes

What to check

  • Read and record all stored SRS codes and freeze-frame data with a capable scan tool
  • Visually inspect RH side impact sensor, mounting, and harness for damage, moisture, or corrosion
  • Check connectors are fully seated and locking tabs intact
  • Perform wiggle test of wiring/connector while monitoring live sensor data (if available)
  • Measure continuity and resistance of sensor wiring to the airbag ECU
  • Check reference supply voltage and ground at the sensor with engine off and ignition ON (follow manufacturer procedure)

Signal parameters

  • Reference supply: typically a regulated reference from SRS ECU (manufacturer-specific; often 5V or mid-supply for accelerometer sensors) — verify with factory data
  • Sensor output: at rest the accelerometer/sensor output usually sits near mid-reference (not saturated at rail); should change under applied movement
  • Connector pin resistance: expect low resistance (< a few ohms) from sensor ground to chassis ground, and continuity to ECU pin
  • Open-circuit or short-to-power/ground will usually trigger the code
  • Self-test status: PASS/FAIL flag available on factory scan tool

Diagnostic algorithm

  1. Use a compatible diagnostic tool to read B1B76 and any related SRS codes; note freeze-frame and live data.
  2. Do not begin repairs near active airbags. Disconnect the battery negative and wait manufacturer-specified time (commonly 2–3 minutes) before touching SRS harness or sensors.
  3. Perform a careful visual inspection of RH side impact sensor, connector, and harness routing (seat base, B-pillar, door sill). Look for chafing, pinched wires, corrosion or water damage.
  4. Reconnect battery (if removed for safety steps) and with scan tool in live-data view, monitor the sensor’s status while backprobing the connector. Check reference voltage, signal voltage, and ground presence per factory specs.
  5. Wiggle the harness and connector while observing live-data or DTC status to identify intermittent faults.
  6. Measure continuity/resistance between sensor pins and corresponding ECU pins with ignition OFF. Repair any open or high-resistance conditions.
  7. If wiring and connectors are good but sensor output is out of expected range or fails self-test, replace the RH side impact sensor with a factory or OEM-equivalent part.
  8. After repair or replacement, clear codes with the scan tool, perform an SRS system self-test and test drive if required by manufacturer procedures. Re-check for reappearance of the code.
  9. If code persists after replacing sensor and repairing wiring, investigate SRS control module and perform manufacturer-level programming or ECU diagnostics.

Likely causes

  • Connector pinned or corroded at RH side impact sensor
  • Damaged wiring where it passes through door jamb or pillar
  • Sensor impacted by moisture (door/seat area) causing internal failure
  • Sensor mounting damaged or loose producing intermittent readings
  • Aftermarket accessories or prior repairs disturbed the circuit

Fault status

⚠️ Status
Stored fault: Side impact sensor (RH) #2 circuit or sensor failure detected. The SRS warning lamp is active; system diagnostics required. Repair electrical fault or replace sensor as needed and verify with factory diagnostic tool.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

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406

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