Volkswagen CJDA Workshop Manual page 462

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
– If the value in display zone 2 of display group 100 is higher
than the value in display field 1, the two senders have been
interchanged.
– If the values in display zones 1 and 2 of display group 100
are not plausible, check exhaust gas temperature sender 4
-G648- (exhaust gas temperature sender downstream of die-
sel particulate filter) and wiring to sender as follows:
– Exit diagnosis function.
– Switch off ignition.
Checking resistance
– Disconnect 2-pin connector from exhaust gas temperature
⇒ P age
sender 4 -G648-
– Connect multimeter to contacts on connector for sender us-
ing test leads from -V.A.G 1594- to measure resistance.
Specification: 170.0..0.850.0 Ω
If the specification is not attained:
– Renew exhaust gas temperature sender 4 -G648-
⇒ P age
427.
– Then, read event memory of engine control unit, and clear
event memory if necessary
If specification is attained:
– Check wiring of exhaust gas temperature sender 4 -G648-
as follows:
– Using adapter cable -V.A.G 1598/39-2-, connect test box
-V.A.G 1598/42- to wiring harness of control unit
The engine control unit is not connected by this action.
– Check wiring between test box and connector for open cir-
cuit referring to current flow diagram.
◆ Contact 1 + socket 89
◆ Contact 2 + socket 75
● Cable resistance: max. 2.0 Ω.
– Also check wiring for short to one another, short to battery
earth/engine earth and short to battery positive. Specifica-
tion: ∞ Ω
If no fault in lines is detected:
– Renew engine control unit -J623-
3.7 Checking exhaust gas pressure sensor
1 -G450-
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-
446 Repair Group 26 - Exhaust system
427.
⇒ P age
26, read event memory.
⇒ P age
⇒ P age
418.
24.