Faults 3-4L43C, 3-4M43, 3-4M43Z
94
HATZ
Manual
9.3 Flash code table for faults on the exhaust emission after-treatment
system
When there are faults on the diesel particulate filter or exhaust gas return
system, a flashing signal is shown on the indicator lamp for "Fault in the area
of the exhaust emission after-treatment system" (see Explanation of sym-
bols, chapter 7.4 Starting the engine, page 35). A dirty air filter unit is also in-
dicated by a flashing signal. The table below shows possible flashing sig-
nals, their meaning, as well as action for remedies.
If the listed fault cases have been worked through but the fault continues to
persist, please contact your nearest HATZ service.
Flashing signal
Flashing – Pause
Possible causes Remedy Chapter
1 – 1
Area affected:
Exhaust gas recir-
culation (EGR)
Faulty cabling to
the EGR sensor.
Check the cabling.
Malfunction in the
EGR valve.
Contact Hatz ser-
vice.
3 – 1
Area affected:
Pressure ratios in
the diesel particu-
late filter (DPF)
DPF not leak tight. Check the DPF for
leaks
Faulty differential
pressure sensor.
Contact Hatz ser-
vice.
Leak or clogging in
the differential
pressure line.
Check the differen-
tial pressure line.
4 – 1
Area affected:
High current relay
(HCR)
Cabling loose or
faulty.
Check the cabling.
Faulty high current
relay.
Contact Hatz ser-
vice.
Faulty coiled fila-
ment in the fuel
evaporator.
Replace the coiled
filament.
8.2.17
Check the
fuel evapo-
rator (vapor-
izer) and
clean if nec-
essary.,
page 81
Faulty fuse. Renew the fuse.
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