check engine AUDI A4 1995 B5 / 1.G APB Engine Electronic Engine Power Control Checking Owner's Manual
Page 28 of 39
24-161
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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Page 32 of 39
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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gine Power Control
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Page 35 of 39
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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gine Power Control
(EPC
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