Volkswagen CJDA Workshop Manual page 333

● The accelerator position value must increase continuously.
Specification at full throttle position: 100.0%.
Display zone 3:
● The 5th digit from the left must change to 0. Display:
xxxx0xxx
– Exit diagnosis function.
– Switch off ignition.
End specification value not achieved:
– Renew accelerator position sender -G79-.
– Then, read event memory of engine control unit, and clear
event memory if necessary
Display does not change or is erratic:
– Switch off ignition.
Checking voltage supply
– Connect multimeter to contacts 2 + 3 of connector using test
leads from -V.A.G 1594- to measure voltage.
– Switch on ignition. Specification: at least 4.8...5.2 V
– Switch off ignition.
– Then, connect multimeter to contacts 1 + 5 of connector us-
ing test leads from -V.A.G 1594- to measure voltage.
– Switch on ignition. Specification: at least 4.8...5.2 V
– Switch off ignition.
– Check wiring of accelerator position sender 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.
– Pull 6-pin connector off accelerator position sender.
– Check wiring between test box and connector for open cir-
cuit referring to current flow diagram.
◆ Contact 1 + socket 13
◆ Contact 2 + socket 15
◆ Contact 3 + socket 74
◆ Contact 4 + socket 53
◆ Contact 5 + socket 8
◆ Contact 6 + 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 wiring fault is detected and voltage was present between
contacts 2 + 3 and 1 + 5:
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
⇒ P age
26, read event memory.
⇒ P age
Industriemotoren - Industrial Engines 2009 ▶
24.
2 Checking components and functions
3
317