Volkswagen CJDA, Workshop Manual

Page: 425 / 553

Scale -A- shows resistance values for a temperature range of
0…50°C, and scale -B- shows the values for a temperature
range of 50…100°C.
Examples:
◆
30°C is on scale -A- and corresponds to a resistance of
1500…2000 Ω.
◆
80°C is on scale -B- and corresponds to a resistance of
275…375 Ω.
If the specification is not attained:
– Renew coolant temperature sender -G62-
⇒
Page 278 , parts
of cooling system, engine side.
– Then, read event memory of engine control unit, and clear
event memory if necessary
⇒
Page 26 , read event memory.
If specification is attained:
– Check wiring of coolant temperature sender as follows:
– Using adapter cable -V.A.G 1598/39-1-, connect test box
-V.A.G 1598/42- to wiring harness of control unit
⇒
Page 24 .
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 53
◆
Contact 2 + socket 54
● 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-
⇒
Page 418 .
2.9 Checking fuel temperature sender -G81-
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 1598/39-1-
◆
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
Industriemotoren - Industrial Engines 2009
▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
3
2 Checking components and functions 409