Volkswagen CJDA Workshop Manual page 78

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 in current
circuit
01652/P0674
Glow plug for cylinder 4
-Q13-
Electrical fault in current
circuit
01658/P067A
Glow plug for cylinder 4
Short to earth
01668/P0684
Glow period control unit 1
-J179-
62 Repair Group 01 - Vehicle self-diagnosis
Possible cause of fault Possible effects
◆ Open circuit or line
short-circuit
◆ Glow plug 3 -Q12-
defective
◆ Open circuit or line
short-circuit
◆ Glow plug 4 -Q13-
defective
◆ Wire open circuit or
wire has short to
earth
Glow plug 4 -Q13- de-
fective
◆ One of the glow plugs
is not functional
◆ One of the glow plugs
is not functional
◆ One of the glow plugs
is not functional
Fault remedy
– Electrical test of glow
plug, connector, wire
to glow plug control
unit.
– Pull off glow plug, and
check resistance
⇒ P age 536
– If resistance is not in-
finite, check wire and
connector.
– Electrical test of glow
plug, connector, wire
to glow plug control
unit.
– Pull off glow plug, and
check resistance
⇒ P age 536
– If resistance is not in-
finite, check wire and
connector.
– Electrical test of glow
plug, connector, wire
to glow plug control
unit.
– Check wiring to auto-
matic glow period con-
trol unit -J179-
⇒ P age
486, current
flow diagrams
– Pull off glow plug, and
read entry in event
⇒ " Removing,
memory
installing and check-
ing glow plugs" on
page 536
– If entry is still stored in
event memory, check
wire and connector