13B-123V1 MR-376-X76-13B000$080.mif
DIESEL INJECTION
Fault finding – Conformity check13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
PARAMETER CHECK (CONTINUED 1)
NOTESOnly perform this conformity check after a thorough check with the diagnostic tool.
The values shown in this conformity check are given as a guide.
Application conditions: Engine stopped, ignition on.
FunctionParameter or status
checked or actionDisplay and notes Fault finding
Air
temperaturePR058:Air
temperatureGives the inlet air temperature
in °C. This information is
supplied by the air
temperature sensor
incorporated in the air
flowmeter.
Default value: 20°C.In the event of a fault, consult the
interpretation of parameter
PR058 then consult the
interpretation of fault DF056 Air
flow sensor circuit.
Fuel
temperaturePR063:Fuel
temperatureCold = PR064
Warm: 50°C
Gives the fuel temperature in
°C. This value is measured by
the fuel temperature sensor.
Default value: 30°C.If there is a fault, use the
interpretation of fault DF098 Fuel
temperature sensor circuit.
Manifold air
temperaturePR311:Manifold air
temperatureIf the value supplied by this
parameter is equal to 50°C,
this does not correspond to a
fault and no interpretation
should be made for this
engine.
Atmospheric
pressurePR035:Atmospheric
pressureIndicates the atmospheric
pressure in mbar. The sensor
is built into the computer. In the event of inconsistency,
with the engine stopped and
ignition on, check that parameter
PR035PR312local
atmospheric pressure. Inlet manifold
vacuumPR312:Inlet manifold
vacuumIndicates the pressure in the
inlet circuit in mbar.
13B-195V1 MR-376-X76-13B000$160.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
TEST 8
CONTINUED 1
When all the preparations are complete, start the engine and leave it running:
For 30 seconds at idle speed for Euro 4 type engines: K9K 714 - 718 - 740 - 792 - 796.
Let it idle for 2 minutesfor the euro 3 type engines: K9K 790 - 794.
Note:
These time periods must be respected for the test results to be interpreted correctly.
–Run command AC029 High pressure circuit sealing check
.The engine will automatically carry out a cycle of four accelerations to increase the rail pressure and measure
the internal injector leaks under these conditions.
–When the cycle has finished, run command AC029 High pressure circuit sealing test a second time to
obtain the correct return volume reading for each injector.
Switch off the engine at the end of the cycle.
