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Home / DTC / B1448 — RR side impact SNS.faulty COM.

B1448 — RR side impact SNS.faulty COM.

Detailed page for trouble code B1448.

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Code

B1448

MITSUBISHI B — Body

RR side impact SNS.faulty COM.

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

Causes

  • Open, short or damage in wiring between RR side impact sensor and SRS control module
  • Corroded, loose or contaminated connector at the RR impact sensor or airbag control module
  • Defective RR side impact sensor (internal electronics failure)
  • Faulty SRS/airbag control module or software anomaly
  • CAN/SRS data bus fault or high bus error rate
  • Water intrusion or physical damage to sensor or connector

Symptoms

  • SRS / airbag warning lamp illuminated on dash
  • Related airbag functions may be disabled or inhibited for the rear/right side
  • One or more stored SRS-related DTCs (communication and sensor codes)
  • Possible cascading SRS codes for other sensors or CAN bus errors

What to check

  • Read and record all SRS/CAN codes with a capable scan tool; note freeze frame and related codes
  • Visually inspect RR side impact sensor, mounting and connector for damage, corrosion, water or impact marks
  • Inspect harness from sensor to airbag control module for chafing, pinched areas, repairs, or aftermarket splices
  • Check connector pins for bent, pushed-out, or corroded terminals; confirm secure mating
  • Verify SRS fuses and main battery connections; confirm battery voltage is stable during testing
  • Scan for CAN bus errors and check related modules for communication faults

Signal parameters

  • Sensor should appear on the SRS/CAN bus and provide periodic data packets to the airbag ECU (no timeouts)
  • No repeated CRC or framing errors on the SRS/CAN network
  • Connector pins should show proper supply and ground according to service data (refer to OEM specs)
  • Continuity between sensor connector and airbag ECU connector with no short to ground or battery

Diagnostic algorithm

  1. Safety first: follow the manufacturer’s SRS disable/enable procedure before touching any airbag components (disconnect battery as directed by service manual).
  2. Use a diagnostic scan tool to read/record all SRS and network codes; clear codes and attempt to reproduce. Note whether B1448 returns and whether other codes appear.
  3. With power removed per service procedure, visually inspect the RR side impact sensor, mounting, and connector for damage, corrosion, water ingress or loose mounting.
  4. Inspect and gently wiggle the harness along its route while watching live data or checking for intermittent communication to reproduce failure.
  5. Check connector terminals for corrosion, pushed-out pins, or poor contact. Repair or replace connector if terminals are suspect.
  6. Perform continuity and short-to-power/ground tests between the sensor connector and the SRS control module connector per wiring diagram. Repair any wiring faults.
  7. If wiring and connectors are good, swap the RR sensor with a known-good sensor (if available and serviceable) or substitute with OEM replacement to confirm sensor fault.
  8. If sensor swap does not clear the issue, inspect SRS control module grounds, power supplies and related CAN/SRS bus components; consider module reprogramming or replacement per OEM guidance.
  9. After repairs, clear codes, re-enable SRS system per procedure, and verify no recurrence; perform final system checks and SRS lamp verification.

Likely causes

  • Connector at RR side impact sensor contaminated/loose
  • Broken/chafed harness conductor to sensor (pin damage)
  • RR impact sensor internal failure
  • Poor ground or supply to sensor
  • SRS control module communication fault

Fault status

⚠️ Status
Rear Right side impact sensor — communication fault detected. SRS warning lamp on; rear/right airbag sensing may be disabled.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

B1449 B1447 B1428 U0073 U0100 U0121
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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Code

B1448

Other B — Body

Wiper Park Sense Circuit Short To Battery

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

Causes

  • Open, short or damage in wiring between RR side impact sensor and SRS control module
  • Corroded, loose or contaminated connector at the RR impact sensor or airbag control module
  • Defective RR side impact sensor (internal electronics failure)
  • Faulty SRS/airbag control module or software anomaly
  • CAN/SRS data bus fault or high bus error rate
  • Water intrusion or physical damage to sensor or connector

Symptoms

  • SRS / airbag warning lamp illuminated on dash
  • Related airbag functions may be disabled or inhibited for the rear/right side
  • One or more stored SRS-related DTCs (communication and sensor codes)
  • Possible cascading SRS codes for other sensors or CAN bus errors

What to check

  • Read and record all SRS/CAN codes with a capable scan tool; note freeze frame and related codes
  • Visually inspect RR side impact sensor, mounting and connector for damage, corrosion, water or impact marks
  • Inspect harness from sensor to airbag control module for chafing, pinched areas, repairs, or aftermarket splices
  • Check connector pins for bent, pushed-out, or corroded terminals; confirm secure mating
  • Verify SRS fuses and main battery connections; confirm battery voltage is stable during testing
  • Scan for CAN bus errors and check related modules for communication faults

Signal parameters

  • Sensor should appear on the SRS/CAN bus and provide periodic data packets to the airbag ECU (no timeouts)
  • No repeated CRC or framing errors on the SRS/CAN network
  • Connector pins should show proper supply and ground according to service data (refer to OEM specs)
  • Continuity between sensor connector and airbag ECU connector with no short to ground or battery

Diagnostic algorithm

  1. Safety first: follow the manufacturer’s SRS disable/enable procedure before touching any airbag components (disconnect battery as directed by service manual).
  2. Use a diagnostic scan tool to read/record all SRS and network codes; clear codes and attempt to reproduce. Note whether B1448 returns and whether other codes appear.
  3. With power removed per service procedure, visually inspect the RR side impact sensor, mounting, and connector for damage, corrosion, water ingress or loose mounting.
  4. Inspect and gently wiggle the harness along its route while watching live data or checking for intermittent communication to reproduce failure.
  5. Check connector terminals for corrosion, pushed-out pins, or poor contact. Repair or replace connector if terminals are suspect.
  6. Perform continuity and short-to-power/ground tests between the sensor connector and the SRS control module connector per wiring diagram. Repair any wiring faults.
  7. If wiring and connectors are good, swap the RR sensor with a known-good sensor (if available and serviceable) or substitute with OEM replacement to confirm sensor fault.
  8. If sensor swap does not clear the issue, inspect SRS control module grounds, power supplies and related CAN/SRS bus components; consider module reprogramming or replacement per OEM guidance.
  9. After repairs, clear codes, re-enable SRS system per procedure, and verify no recurrence; perform final system checks and SRS lamp verification.

Likely causes

  • Connector at RR side impact sensor contaminated/loose
  • Broken/chafed harness conductor to sensor (pin damage)
  • RR impact sensor internal failure
  • Poor ground or supply to sensor
  • SRS control module communication fault

Fault status

⚠️ Status
Rear Right side impact sensor — communication fault detected. SRS warning lamp on; rear/right airbag sensing may be disabled.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

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B1449 B1447 B1428 U0073 U0100 U0121
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