UEC / B3866 04

Read the instructions below then start the fault diagnostic procedure.

Symptom: Right-hand main beam, faulty function. Message appears in display.

B3866 04

Fault symptom

Right-hand main beam, faulty function.

Message appears in display.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Main beam lit.

Fault criteria:

Current consumption is below 0.8 A.

System reaction to a fault:

None

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

Diagnosis regards:

Electrical fault in connecting leads or component.

Functions in the diagnostic tool related to the fault:

Activation:

High Beam Right