Volkswagen Golf / Golf GTI / Jetta. Manual — part 88

20-70

Note:

The engine control module calculates the angle

sender voltage value as a percent of 5 Volts and
displays this percentage. (5 volt supply voltage
equals 100%).

- Depress accelerator pedal slowly until fully

depressed and observe percentage figures in
display zones 3 and 4:

Percentage display in display zone 3 must

increase evenly. Tolerance range 12...97% is
not fully exploited.

Percentage display in display zone 4 must

increase evenly. Tolerance range 4...49% is not
fully exploited.

Note:

The figure displayed in display zone 3 must

always be approximately double the value
displayed in display zone 4.

- Press

key.

- Press keys 0 and 6 for function "End output" and

confirm entry with Q key.

- Switch ignition off.

Electronic Power Control (EPC)

20-71

If the displays do not indicate as described:

- Check Throttle Position (TP) sensor -G79

Sender -2- for accelerator pedal position
voltage supply and wiring connections

20-71

.

Checking voltage supply and wiring to
control module

- Remove cover in footwell (driver's side).

- Pull 6-pin connector from TP sensor / Sender for

accelerator pedal position.

- Switch ignition on.

If the specifications are not attained:

Repair Manual, Electrical Equipment, Repair

Group 92

- Connect multimeter to following connections to

measure voltage using adapter cables from VAG
1594.

Contact 1 and Ground

Contact 1 and 5

Contact 2 and Ground

Contact 2 and 3

Specification: at least 4.5 V

- Switch ignition off.

- Remove wiper arms and cowl panel:

Electronic Power Control (EPC)

20-72

- Connect test box VAG 1598/31 to

control module wiring harness.
Engine control module remains
disconnected.

- Check wiring for open circuit

between test box and connector
referring to wiring diagram.

Contact 1 and socket 72

Contact 2 and socket 73

Contact 3 and socket 36

Contact 4 and socket 35

Contact 5 and socket 33

Contact 6 and socket 34

Wire resistance: max. 1.5

- Additionally check wiring for short

to battery positive or Ground.

- Additionally check wires for short

to one another.

Electronic Power Control (EPC)

20-73

If no wiring malfunction is detected:

- Replace TP sensor / Sender for accelerator

pedal position

Page 20-66

, item - 4 -.

- Check Diagnostic Trouble Code (DTC)

memory:

Repair Manual, 2.8 Liter VR6 4V Fuel Injection

& Ignition, Engine Code(s): BDF, Repair Group
01

- Read readiness code:

Repair Manual, 2.8 Liter VR6 4V Fuel Injection

& Ignition, Engine Code(s): BDF, Repair Group
01

- Generate readiness code again if DTC memory

has been erased or engine control module
disconnected from permanent positive supply:

Repair Manual, 2.8 Liter VR6 4V Fuel Injection

& Ignition, Engine Code(s): BDF, Repair Group
01

Models with an automatic transmission

- Adapt (match) transmission control module:

Repair Manual, 5 Spd. Automatic

Transmission 09A On Board Diagnostic (OBD);
Repair Group 01; Basic setting

Electronic Power Control (EPC)