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.
