13B - 15
DIESEL INJECTION
Fault finding - System operation13B
V10 MR-372-J84-13B150$094.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
d) OBD management
The OBD (On Board Diagnostic) system enables detection of any faults relating to the vehicle emission control
system (OBD EURO IV emission control standards exceeded).
This system should be active for the entire life of the vehicle.
1. Conditions causing an OBD fault
An OBD fault will be detected after 3 operating cycles, and the following parameters will be saved in the calculator:
– engine load,
– vehicle speed,
– air temperature,
– coolant temperature,
– turbocharging pressure,
– rail pressure,
–air flow,
– vehicle mileage.
It allows the driver to know whether their vehicle has a fault directly linked to the emission control system.
2. System faults indicated by the OBD
Only a few faults are indicated by the OBD system:
–DF012 Sensor supply voltage no. 2.
–DF038 Computer.
–DF040 Cylinder 1 injector circuit.
–DF041 Cylinder 2 injector circuit.
–DF042 Cylinder 3 injector circuit.
–DF043 Cylinder 4 injector circuit.
–DF209 EGR valve position sensor circuit.
–DF272 EGR valve control circuit.
–DF621 EGR valve jammed open.
Some repair operations require programming to ensure that certain engine components function correctly.
Follow the programming procedures (described in the component replacement section), if replacing an
exhaust gas recirculation valve or an injector.
