B1002
Diagnosis Sensor Unit
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)
Symptoms
- SRS indicator is on
- The passive safety system does not pass self-diagnosis
- False airbag deployments (rare)
Causes
- Open or shorted wiring harness
- Oxidation of module contacts
- Internal fault Diagnosis Sensor Unit
- Module power problems
- Software failure
How to Fix
- Check the condition of the wiring harness and contacts
- Check power supply to 843mass module
- Scan the system for other fault codes
- Replace Diagnosis Sensor Unit if necessary
- Software flashing of the module (if required)