Volkswagen CJDA Workshop Manual page 56

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Indicated on display
Electrical fault
00385/P0181
Fuel temperature sender
-G81-
40
Repair Group 01 - Vehicle self-diagnosis
Possible cause of fault Possible effects
◆ Wiring open circuit
◆ Lambda probe heater
-Z19- defective
◆ If there is a definite
fault, the output duty
cycle is set to 0%.
Zero quantity calibra-
tion, calculation of die-
sel particulate filter
load, exhaust gas
temperature regula-
tion, FMO locked
◆ Regeneration of NOx
storage catalytic con-
verter is locked
Fault remedy
– -Z19- Check.
⇒ P age 441
– Check measuring re-
sistor: disconnect uni-
versal lambda probe,
and measure on con-
tacts of coupling be-
tween "pump current
(APE)" and "trimm re-
sistor (Ri)", R=60-65
ohm; Warning!: termi-
nal 15 Off for this ⇒ if
measuring resistor is
defective, renew
lambda probe. Check
voltage supply: dis-
connect universal
lambda probe, and
measure on contacts
of coupling between
"virtual earth (IPN)"
and "body earth",
V=2-3 V; Warning!:
terminal 15 ON for this
⇒ if there is no volt-
age, check wire for
open circuit and re-
new it as necessary.
Check wires for
"pump current (APE)",
"virtual earth (IPN)",
"trimm resistor (Ri)"
and "Nernst voltage
(RE+) for open circuits
and short-circuits. ⇒ if
there are open circuits
or short-circuits, repair
lines ⇒ if the fault per-
sists, check ECU