Volkswagen CJDA Workshop Manual page 54

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Indicated on display
Signal too large
00289/P0121
Throttle valve potentiom-
eter -G69-
Implausible signal
00290/P0122
Throttle valve potentiom-
eter -G69-
Signal too low
00291/P0123
Throttle valve potentiom-
eter -G69-
38 Repair Group 01 - Vehicle self-diagnosis
Possible cause of fault Possible effects
◆ Wire open circuit or
wire has short to
earth
◆ -G62- defective
◆ Open circuit or line
short-circuit
◆ Throttle valve potenti-
ometer -G69- defec-
tive
◆ Wiring open circuit or
wiring short to posi-
tive
◆ Throttle valve potenti-
ometer -G69- defec-
tive
◆ Alternative values are
used for coolant, alter-
native values are only
used for temperature
range
◆ Bad cold start behav-
iour possible
◆ No limitations
◆ Regeneration is
locked
Fault remedy
– -G62- Check.
⇒ P age 407
– Check thermostat
⇒ P age
278, 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
– Check -J338-
⇒ P age
89, final
control diagnosis
– -J338- Check.
⇒ P age 414
– Check electrical con-
nection to sensor
– Check -J338-
⇒ P age
89, final
control diagnosis
– -J338- Check.
⇒ P age 414
– Check electrical con-
nection to sensor