sensor AUDI A4 1995 B5 / 1.G APB Engine Electronic Engine Power Control Checking User Guide

24-155
The percentage value in display field 1 should
rise steadily, but without covering the full
tolerance range between 3 - 93 %.
The percentage value in display field 2 should
also rise steadily but without covering the full
range of values (in this case 4 - 49 %).
If the display values do not appear as described:

- Check voltage supply and wiring to accelerator
position senders Page 24
-163
.
Observe harness connectors for the following:
Loose connectors, not properly engaged or
corroded.

Electrical Wiring Diagrams, Troubleshooting &
Component Locations
- Check accelerator position sensors Page 24
-
159
.
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Throttle Position (TP) sensor -G79 and
Sender -2- for accelerator pedal position
-G185, checking


Component location of Throttle Position (TP) sensor -G79 and
Sender -2- accelerator pedal position
The Throttle Position (TP) Sensor -G79 and Sender -2- for accelerator
pedal position -G185 are located at the accelerator pedal. Both sensors
inform (completely independently of the other) the engine control module
of the driver's throttle requirement (pedal position). Both sensors are
located in a single housing.
- 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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Display fields

1 2 3 4
Display Group 062: Electronic throttle potentiometer voltages
Display xx % xx %
xx %
xx %
Indicates Throttle valve angle
(angle sensor 1) Throttle valve angle
(angle sensor 2) Accelerator position
sensor 1 Accelerator position
sensor 2
Work Range min.: 0 %
max.: 100 % min.: 0 %
max.: 100 % min.: 0 %
max.: 100 % min.: 0 %
max.: 100 %
Specified value 3 - 93 % 97 - 3 %
12 - 97 %
(Idle value: 12 - 18%) 4 - 49 %
(Idle value: 4 - 13%)
Note:
The engine control module converts the voltage
readings from the angle sensors into
percentages of 5 V and displays them as
percentages. (A signal wire voltage of 5 V is
equivalent to 100%.)

- Observe display fields 3 and 4.

- Slowly depress accelerator pedal to full throttle
position.
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Note:
The value shown in display field 3 should always
be about the double of the value shown in
display field 4.
If the display values do not appear as described:

- Check voltage supply and wiring to accelerator
position sensors Page 24
-163
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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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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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- 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
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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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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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