13B-15V1 MR-376-X76-13B000$030.mif
DIESEL INJECTION
Fault finding – System operation13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Instrument panel display
The computer manages the data display on the instrument panel relating to engine operation.
There are six functions concerned:
–the On board diagnostics MIL (Malfunction Indicator Lamp),
– pre-postheating,
– the coolant temperature,
– engine problems; Level 1 (non-critical fault) and Level 2 (emergency stop).
– detection of water in the fuel (depending on instrument panel).
These six functions are represented using four indicator lights.
Pre-postheating and electronic fault warning light (Level 1)
This light is used to indicate that the heater plugs are preheating and as a system fault indicator light:
– Continuously illuminated during + after ignition feed: indicates preheating of the heater plugs.
– Flashing after preheating and an automatic 3-second stop indicates a Level 1 fault (the function is not working
optimally and safety levels are reduced). The user must carry out repairs as soon as possible).
Engine coolant temperature warning light (Level 2)
This indicator light is used both as an in-operation indicator light and as a system fault warning light. It illuminates for
3 seconds when the power is switched on (automatic test procedure).
Continuously illuminated during + after ignition feed: indicates engine overheating or a Level 2 fault.
OBD warning light
This warning light is used to alert the driver of any injection faults that could lead to excessive pollution, or if the OBD
system has been deactivated.
The injection computer requests illumination of the OBD warning light for a present fault only after three successive
driving cycles.
The 3 second visual inspection when the ignition is switched on (automatic test procedure managed by the
instrument panel) is carried out by the injection computer.
13B-16V1 MR-376-X76-13B000$030.mif
DIESEL INJECTION
Fault finding – System operation13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Faults that activate the OBD warning light
Water present in fuel warning light (depending on the instrument panel)
This warning light is used to warn the driver about the presence of water in the fuel filter, which leads to engine
damage. It lights up for 3 seconds when the power comes on (automatic test procedure). When the vehicle is not
fitted with this warning light or if it is not configured, this function is provided by the Level 1 warning light. Tool fault Diagnostic tool title Specification
DF016EGR control circuitCO - CO.0
CC.1 - 1.DEF
DF026Cylinder 1 injector circuit controlCO - CC
DF027Cylinder 2 injector circuit controlCO - CC
DF028Cylinder 3 injector circuit controlCO - CC
DF029Cylinder 4 injector circuit controlCO - CC
DF038Computer3.DEF
DF107Computer memory2.DEF
DF114EGR solenoid valve circuit4.DEF
DF209EGR valve position sensor circuitCC.1-CO.0
