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ACM Ch.61034050- / B3856 02

Read the instructions below then start the fault diagnostic procedure.

Symptom: Airbag warning lamp is lit

  B3856 02


Passenger Side C-pillar Sensor Circuit, Short to Ground

Fault symptom

Airbag warning lamp is lit

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.

Fault criteria:

Voltage on the control module input is outside of the permissible limit value.

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: