Volkswagen CJDA Workshop Manual page 427

– Connect multimeter to sender contacts using test leads from
-V.A.G 1594- to measure resistance.
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 fuel temperature sender -G81-.
– Then, read event memory of engine control unit, and clear
event memory if necessary
If specification is attained:
– Check wiring of fuel 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
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 42
● 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-
2.10 Checking air mass meter -G70-
Function
The air mass meter signal is used by the engine control unit to
calculate the quantity injected and to control the required ex-
haust gas recirculation. The smaller the signal from air mass
meter the smaller the quantity of fuel injected.
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
⇒ P age
26, read event memory.
⇒ P age
⇒ P age
418.
Industriemotoren - Industrial Engines 2009 ▶
24.
2 Checking components and functions
3
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