Volkswagen CJDA Workshop Manual page 74

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Indicated on display
01612/P064C
Glow period control unit
01617/P0651
Sender reference voltage
"B"
58 Repair Group 01 - Vehicle self-diagnosis
Possible cause of fault Possible effects
◆ Wire open circuit or
wire has short to
earth
◆ Wrong automatic
glow period control
unit -J179- installed
◆ Glow period warning
lamp -K29- lights up
◆ Engine does not start
or is difficult to start
when cold
◆ Smoke is generated
when engine is star-
ted
Fault remedy
– Check -J179-
⇒ P age
89, final
control diagnosis
– After a while, the fault
should stored. Rectify
fault: glow plug control
unit does not match
engine control unit.
Has one of the control
units been renewed,
and did an error occur
while doing so?
– Check whether the
correct -J179- is in-
stalled
– Check COM line (DI
line) between glow pe-
riod control unit and
ECU.