ME9 / P0504 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Cruise control not working.

P0504 00

Fault symptom

Cruise control not working.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Battery voltage must be between 10 - 18 V.

Engine running.

Fault criteria:

Switches have the same status for 1 seconds when the vehicle brakes/accelerates (2.6 m/s2).

System reaction to a fault:

Cruise control switched off.

Fault handling:

Type III

(See section Fault handling III, "Other emission-related components and functions" for more information.)

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.

Improperly fitted switch.

Functions in the diagnostic tool related to the fault:

Test value:

•	Brake Light Switch

•	Brake Switch 2

(See also description of readings/activations in diagnostic tool)