Code
B1005
LAND ROVER
B — Body
impact classification sensor left front
Views:
UK: 23
EN: 14
RU: 9
AI status
Completed
Completed
100%
Causes
- Damaged or failed left-front impact classification (accelerometer) sensor
- Open, short or high-resistance wiring in sensor harness (power, ground, signal)
- Corroded or loose connector pins at the sensor or body control/module
- Previous crash damage or improper repairs affecting sensor mounting or wiring
- Faulty SRS / Restraints Control Module (RCM) or software/configuration error
- Low vehicle battery voltage or poor ground condition during operation
Symptoms
- SRS / airbag warning lamp illuminated on instrument panel
- Possible SRS-related messages on dash (airbag disabled, service required)
- Left-front airbag deployment logic may be inhibited or incorrect
- Related crash data or other SRS fault codes stored in RCM
- No drivability symptoms (engine/drive unaffected) in most cases
What to check
- Read codes and freeze-frame data with a capable scan tool (manufacturer IDS or equivalent). Record all SRS-related codes.
- Confirm vehicle battery voltage is within specification and test again after charge if low.
- Visually inspect left-front impact sensor, mounting, and wiring for damage, corrosion, water ingress, or loose fasteners.
- Inspect the connector for bent pins, corrosion, pushed-out terminals, or evidence of previous repairs.
- Perform backprobe/measurements at the sensor connector: reference power, ground, and signal lines (follow safety and manufacturer procedure).
- Check continuity and resistance of harness to the SRS control module; look for shorts to ground or battery.
Signal parameters
- Reference supply: typically vehicle 5 V reference (verify exact value from factory data for the model/year).
- Idle/output: many accelerometer-based impact classification sensors sit near mid-rail (~2.5 V) on each axis at rest; sudden G events change axis voltages proportionally.
- Signal type: could be analog voltage per axis or a digital/serial output depending on model year — confirm with manufacturer wiring diagram.
- Expected continuity: power and ground should have low resistance to battery rails; signal lines should not be shorted to power or ground.
- Data/update: output rate typically tens to hundreds of Hz; look for abnormal noise, dropouts, or frozen values in live data.
Diagnostic algorithm
- Safety first: follow Land Rover SRS procedures — disable battery/airbag system per factory manual before disconnecting sensors or connectors and allow required discharge time.
- Connect an OEM-capable scan tool and record all SRS codes, freeze-frame, and live data for the left-front impact sensor.
- Visually inspect sensor, bracket, and harness routing for impact damage, deformation, chafing, or corrosion. Check mounting torque and position.
- With ignition on (and following safety procedures), backprobe the sensor connector and confirm reference voltage, ground integrity, and sensor signal behavior. Compare to factory values.
- Wiggle-test harness and connector while monitoring live data to identify intermittent opens/shorts.
- If signal is shorted or open, isolate the harness and repair wiring (splice, replace harness section, or repair connector) and retest.
- If wiring is good but sensor output is out-of-range or noisy, replace the left-front impact classification sensor with OEM part.
- After replacement, program/configure the sensor or RCM if required by manufacturer procedures. Some modules require coding/calibration after component replacement.
- Clear codes, perform SRS self-tests with scan tool, and verify no DTC returns. Restore battery connection and perform any recommended post-repair verification and road test.
- If fault persists after sensor replacement and wiring verified, test/replace the SRS/RCM per factory diagnostic flow or consult dealer-level support.
Likely causes
- Sensor connector corrosion or pin damage (common after road debris or previous repair)
- Broken/shorted harness between sensor and SRS module (wear, chafing, or impact)
- Failed sensor due to impact, age, or internal electronics fault
- Module configuration or software mismatch after replacement or repair
Fault status
Status
Left-front impact classification sensor fault detected. SRS warning lamp illuminated and left-front airbag classification/ deployment logic may be disabled until fault is repaired.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
B1005
MITSUBISHI
B — Body
Rear inside TEMP.SNS.performance
Views:
UK: 28
EN: 20
RU: 20
AI status
Completed
Completed
100%
Causes
- Damaged or failed left-front impact classification (accelerometer) sensor
- Open, short or high-resistance wiring in sensor harness (power, ground, signal)
- Corroded or loose connector pins at the sensor or body control/module
- Previous crash damage or improper repairs affecting sensor mounting or wiring
- Faulty SRS / Restraints Control Module (RCM) or software/configuration error
- Low vehicle battery voltage or poor ground condition during operation
Symptoms
- SRS / airbag warning lamp illuminated on instrument panel
- Possible SRS-related messages on dash (airbag disabled, service required)
- Left-front airbag deployment logic may be inhibited or incorrect
- Related crash data or other SRS fault codes stored in RCM
- No drivability symptoms (engine/drive unaffected) in most cases
What to check
- Read codes and freeze-frame data with a capable scan tool (manufacturer IDS or equivalent). Record all SRS-related codes.
- Confirm vehicle battery voltage is within specification and test again after charge if low.
- Visually inspect left-front impact sensor, mounting, and wiring for damage, corrosion, water ingress, or loose fasteners.
- Inspect the connector for bent pins, corrosion, pushed-out terminals, or evidence of previous repairs.
- Perform backprobe/measurements at the sensor connector: reference power, ground, and signal lines (follow safety and manufacturer procedure).
- Check continuity and resistance of harness to the SRS control module; look for shorts to ground or battery.
Signal parameters
- Reference supply: typically vehicle 5 V reference (verify exact value from factory data for the model/year).
- Idle/output: many accelerometer-based impact classification sensors sit near mid-rail (~2.5 V) on each axis at rest; sudden G events change axis voltages proportionally.
- Signal type: could be analog voltage per axis or a digital/serial output depending on model year — confirm with manufacturer wiring diagram.
- Expected continuity: power and ground should have low resistance to battery rails; signal lines should not be shorted to power or ground.
- Data/update: output rate typically tens to hundreds of Hz; look for abnormal noise, dropouts, or frozen values in live data.
Diagnostic algorithm
- Safety first: follow Land Rover SRS procedures — disable battery/airbag system per factory manual before disconnecting sensors or connectors and allow required discharge time.
- Connect an OEM-capable scan tool and record all SRS codes, freeze-frame, and live data for the left-front impact sensor.
- Visually inspect sensor, bracket, and harness routing for impact damage, deformation, chafing, or corrosion. Check mounting torque and position.
- With ignition on (and following safety procedures), backprobe the sensor connector and confirm reference voltage, ground integrity, and sensor signal behavior. Compare to factory values.
- Wiggle-test harness and connector while monitoring live data to identify intermittent opens/shorts.
- If signal is shorted or open, isolate the harness and repair wiring (splice, replace harness section, or repair connector) and retest.
- If wiring is good but sensor output is out-of-range or noisy, replace the left-front impact classification sensor with OEM part.
- After replacement, program/configure the sensor or RCM if required by manufacturer procedures. Some modules require coding/calibration after component replacement.
- Clear codes, perform SRS self-tests with scan tool, and verify no DTC returns. Restore battery connection and perform any recommended post-repair verification and road test.
- If fault persists after sensor replacement and wiring verified, test/replace the SRS/RCM per factory diagnostic flow or consult dealer-level support.
Likely causes
- Sensor connector corrosion or pin damage (common after road debris or previous repair)
- Broken/shorted harness between sensor and SRS module (wear, chafing, or impact)
- Failed sensor due to impact, age, or internal electronics fault
- Module configuration or software mismatch after replacement or repair
Fault status
Status
Left-front impact classification sensor fault detected. SRS warning lamp illuminated and left-front airbag classification/ deployment logic may be disabled until fault is repaired.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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