ME9 / P0504 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Cruise control not working.
Brake Light/Brake Pedal Switch Plausibility Error
Fault symptom
Cruise control not working.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 10 - 18 V. |
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:
| (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:
| (See also description of readings/activations in diagnostic tool) |
