Indicated on display
Possible cause of fault Possible effects
Fault remedy
Signal too large
◆
Wire open circuit or
wire has short to
earth
◆
-G62- defective
◆
Alternative values are
used for coolant, alter-
native values are only
used for temperature
range
◆
Bad cold start behav-
iour possible
– -G62- Check.
– Check thermostat
, parts of
cooling system - en-
gine side
– Pull off temperature
sensor, and measure
reference volt-
age (3.3 V) on signal
line, measured value
block "DEngDst_uR-
aw"
⇒
connect signal
line to earth, if sensor
raw voltage in meas-
ured value block = 0 V
⇒
check sensor wire
to ECU
– Wire to ECU OK, ECU
defective
00289/P0121
Throttle valve potentiom-
eter -G69-
Implausible signal
◆
Open circuit or line
short-circuit
◆
Throttle valve potenti-
ometer -G69- defec-
tive
◆
No limitations
– Check -J338-
control diagnosis
– -J338- Check.
– Check electrical con-
nection to sensor
00290/P0122
Throttle valve potentiom-
eter -G69-
Signal too low
◆
Wiring open circuit or
wiring short to posi-
tive
◆
Throttle valve potenti-
ometer -G69- defec-
tive
◆
Regeneration is
locked
– Check -J338-
control diagnosis
– -J338- Check.
– Check electrical con-
nection to sensor
00291/P0123
Throttle valve potentiom-
eter -G69-
3
Industriemotoren - Industrial Engines 2009
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Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
38
Repair Group 01 - Vehicle self-diagnosis