13B-288
MR-372-J84-13B050$897.mif
V17
DIESEL INJECTION
Fault finding – Fault Finding Chart
Siemens Injection
SID301 and 304
Vdiag No.: 44-45-48-49-4D-4C
Program No.: B1 and B2
13B
ALP 15 Excessive consumption
NOTESOnly address this customer complaint after a complete check with the diagnostic
tool.
Check the injection computer: that the connections and wiring are in good condition, that earths and feeds are
present.
If the wiring is faulty and there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
Check the air inlet circuit (refer to the interpretation of fault DF301 Air inlet circuit).
Check that the damper valve operates correctly (refer to the interpretation of fault DF641 Damper valve circuit).
Check the air flowmeter (refer to the interpretation of faults DF039 Inlet air temperature sensor circuit, DF129
Air flow requested and DF056 Air flow sensor circuit).
Check the coolant temperature sensor (refer to the interpretation of faults DF001 Coolant temperature sensor
circuit).
Check the turbocharging pressure (consult the interpretation of fault DF004 Turbocharging pressure sensor
circuit).
Check the low pressure fuel supply system by performing test 1 Low pressure supply check and test 2
Internal fuel transfer pump (ITP) check.
Check the high pressure fuel supply system by performing test 3 High pressure fuel pressure solenoid valve
check, test 4 High pressure pump (HPP) and fuel flow solenoid valve check and test 5 Rail high pressure
regulation circuit check.
Check the injectors by performing test 6 Major injector leak/injectors open and test 7 Incorrect injection
amount.
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
SID301_V44_ALP15 / SID304_V45_ALP15 / SID301_V48_ALP15 / SID304_V49_ALP15 / SID304_V4D_ALP15 / SID301_V4C_ALP15
