P0651

4680 - P0651

Information saved in
DDE

Fault code
4680 - P0651

Fault text
DDE: Supply voltage 2: Short circuit to positive or ground

Fault description
The sensor power-supply voltage is monitored by the DDE
hardware. If the power-supply voltage for sensor group 2 is
outside the limits the diagnostic trouble code is logged.
The limits are defined by the hardware.
Sensor group 2 includes the following sensors:
- accelerator pedal module sensor 2
- particulate filter's exhaust-gas differrential pressure sensor
- brake vacuum sensor
- EGR valve position sensor
- Exhaust-gas pressure sensor before turbocharger

Condition for fault identification
Test condition:
The error check proceeds continuously according to the
programmed process grid.
Voltage condition:
The error check proceeds continuously according to the
programmed process grid.

Condition for fault memory entry
Debounce (80 ms)

Action in service
Check all of the components connected to sensor power-
supply voltage 2 for corresponding diagnostic trouble codes
(short circuit).
If this kind of diagnostic trouble code is entered in the ECU:
Conduct fault diagnosis for the affected component.
If no diagnostic trouble code of this type has been logged:
Replace DDE control module.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none