P0507

4DEC - P0507

Information saved in
DDE

Fault code
4DEC - P0507

Fault text
DDE: Idle speed, plausibility: Actual idle speed too high

Fault description
Idle controller monitoring.
The diagnostic trouble code is logged when the engine's idle
rpm rises above a limit value. The limit value wird is
calculated from the lower specified engine rpm as defined
according to operating point and the offset value
HLSDem_nOfsMonMax_C. The maximum limit value is
1500 1/min.

Condition for fault identification
Test condition:
The test routine runs when the following conditions are
satisfied:
The idle controller is active.
The vehicle's speed must exceed 1 km/h.
The idle controller is the only station requesting torque
generation.
The idle controller is requesting torque lower than the limit
value 0.
The engine rpm exceeds the limit value 300 1/min.
The check runs continuously in a 100 ms grid.
Voltage condition:
The test routine runs when the following conditions are
satisfied:
The idle controller is active.
The vehicle's speed must exceed 1 km/h.
The idle controller is the only station requesting torque
generation.
The idle controller is requesting torque lower than the limit
value 0.
The engine rpm exceeds the limit value 300 1/min.
The check runs continuously in a 100 ms grid.

Condition for fault memory entry
Debounce (3000 ms)

Action in service
-

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none