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ACM Ch.-61034049 / B3855 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Airbag warning lamp is lit

  B3855 00


Driver Side C-pillar Sensor, Faulty Communication

Fault symptom

Airbag warning lamp is lit

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.

Fault criteria:

Sensor uses more than 90 mA for more than 20 ms.

System reaction to a fault:

The airbag system should be considered non-operational. There may, however, be some functionality.
The control module ignores the activation command from the sensor as long as a fault is active.

Checking the wiring harness


Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

IMPORTANT

Read "Before starting fault diagnosis" under Fault diagnosis, general before beginning fault diagnosis.

Diagnostic help

Diagnosis regards: