If no fault is found:
Renew fuel pump.
Note
Check fuel system for leaks.
2.2
Checking accelerator pedal position
sender -G79-, if fitted
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 section below provides only general instructions for
checking the accelerator position sender, since due to the
various use cases it is not possible to specify a common pro-
cedure.
◆
The accelerator position sender -G79- and accelerator posi-
tion sender 2 -G185- are installed in one common housing.
◆
Only gold-plated contacts may be used when repairing the
contacts in the connector of the accelerator position sender.
– Switch on ignition.
– Connect vehicle diagnostic tester, and select engine control
unit.
– Select diagnosis function “011-Read measured value block”.
– Select “Display group 2”.
– Check accelerator position display in display zone 2. The ac-
celerator must not be depressed. Specification: 0.0%
– In addition check the idling speed switch display in display
zone 3. The 5th digit from the left must show 1. Display:
xxxx1xxx
– Depress accelerator slowly until fully down, and observe dis-
play zones 2 and 3.
Display zone 2:
Display group 2
xxxx/min 0.0 % xxxx1x xxx.x°C
Display group 2
xxxx/min 100.0 % xxxx0x xxx.x°C
3
Industriemotoren - Industrial Engines 2009
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Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
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Repair Group 20 - Fuel supply system
