AUDI A4 1996 B5 / 1.G APB Engine Electronic Engine Power Control Checking Owner's Guide

24-163

Checking voltage supply of accelerator
position sensors

- Remove storage compartment on driver's
side.

Repair Manual, Body Interior, Repair Group
68


- Disconnect harness connector for accelerator
position sensor.

- Switch ignition on.

- Connect hand-held multimeter (voltage range) between the following
sockets on the connector: 6-pin connector on wiring harness, socket
Specification
2 + Ground (GND) approx. 5 V
1 + 3 approx. 5 V
5 + Ground (GND) approx. 5 V
5 + 4 approx. 5 V
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24-164
If the specifications are obtained:

- Check signal wiring Page 24
-164
.
If the specifications are not obtained:

- Check wiring between Engine Control Module
(ECM) and accelerator position sensors.

Checking wiring

- Connect VAG1598/31 test box to wiring harness
for engine control module. Do not connect to the
engine control module itself Page 24
-20
.

- Check for open circuit and short to B+ or Ground
(GND) in the following wiring connections:

Connector socket
VAG1598/31 test box
Socket
1 72
2 73
3 36
4 35
5 33
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6 34
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24-165

- Repair any open/short circuit as necessary.
If no wiring malfunction is detected:

- Replace accelerator position sensors.

Note:
After replacing accelerator position sensor, on
vehicles with automatic/stepless transmission
carry out adaptation of Kick-Down switch
Page 24
-166
.
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24-166

Kick-Down function, adaptation

On vehicles with automatic/inifinitely variable
transmission, when the accelerator position
sensor or the Engine Control Module (ECM) was
replaced, the Kick-Down function from ECM must
be adapted.

Test conditions

No malfunctions stored in DTC memory
Page 01
-15
, check DTC memory

Engine not running, ignition switched on

- Connect vehicle diagnostic, testing and
information system VAS 5051 or VAG1551 scan
tool and select engine electronics control
module by entering address word "01" Page 01
-9 .

When doing this the ignition must be switched
on.
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24-167

Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -4- to select function "Basic Setting" and confirm
entry with -Q- button.
Basic Setting Input displa
y group number
XXX

Indicated on display
- Press buttons -0-, -6- and -3- to select "display group number 063" and
confirm entry with -Q- button.
System in Basic Setting 63
1
2
3
4

Indicated on display
Note:
You are prompt to: "Activate Kick-Down"
Note:
During the Kick-Down point adaptation the VAG1551 displays "Kick-Down
ADP. runs". After the Kick-Down point adaptation was successfully carried
out the VAG1551 displays "Kick-Down ADP. OK", now you can release
the accelerator pedal. - Depress accelerator pedal fully pass the Kick-Down point and hold
accelerator pedal at this position.
- Check specification in display field 4.
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24-168


Display fields

1 2 3 4
Display Group 063: Kick-down function adaptation
Display xx % xx %

---
Indicated accelerator
position
sensor 1 accelerator
position
sensor 2
Adaptation condition
Work
range 0...100 % 0...100 %


Kick Down Activate
ADP. runs
ADP. OK
ADP. ERROR
Specified
value 12...97 % 4...49 %
Kick Down
ADP. OK
Note


IF "ADP. ERROR" is displayed: Check DTC memory Page
01
-15
.
Note:

The Abbreviation "ADP." stands for adaptation.
The "ERROR" display could appear, if the accelerator pedal was not immediately depressed after you have been
prompted or the accelerator pedal was released during the adaptation although the adaptation was not completely carried
out. In both cases the "Basic Setting" mode must be abandoned and the adaptation must be started again Page 24
-
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166
.
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24-169
If the specification "ADP. OK" is obtained:

-
Press button.Rapid data transfer
HELP
Select function XX

Indicated on display (Select function)
- Press buttons -0- and -6- to select function "End Output".
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