Volkswagen CJDA Workshop Manual page 457

– Then, read event memory of engine control unit, and clear
event memory if necessary
If no wiring fault is detected and no voltage was present be-
tween contacts 2 + 6:
– Renew engine control unit -J623-
3.4 Checking lambda probe heater -Z19-
Special tools and workshop equipment required
◆ Hand multimeter -V.A.G 1526- or multimeter -V.A.G 1715-
◆ Auxiliary measuring set -V.A.G 1594-
◆ Test box -V.A.G 1598/42- with adapter cable
-V.A.G 1598/39-2-
◆ Current flow diagram
Test prerequisites
● Fuses must be OK.
● The battery voltage must be at least 11.5 V.
● All electrical consumers must be switched off.
● Earth connections OK
Test procedure
Note
◆ The lambda probe heater -Z19- and lambda probe -G39- are
installed in one common housing.
◆ Only gold-plated contacts may be used when repairing con-
tacts in connector of lambda probe and lambda probe heat-
er.
– Disconnect 6-pin connector from lambda probe -G39-
⇒ P age
427.
Checking resistance
– Connect multimeter to contacts 3 + 4 of connector to lambda
probe heater using test leads from -V.A.G 1594- to measure
resistance. Specification: 25.0 Ω (at room temperature)
If the specification is not attained:
– Renew lambda probe -G39-
view - diesel particulate filter.
– Then, read event memory of engine control unit, and clear
event memory if necessary
If specification is attained:
Checking voltage supply
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
⇒ P age
26, read event memory.
⇒ P age
418.
⇒ P age
427, Assembly over-
⇒ P age
26, read event memory.
Industriemotoren - Industrial Engines 2009 ▶
3 Checking components and functions
3
441