lock AUDI A3 1997 8L / 1.G ATW Engine Electronic Power Control Checking Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1997, Model line: A3, Model: AUDI A3 1997 8L / 1.GPages: 51, PDF Size: 0.3 MB
Page 21 of 51

24-128
       Angle sensor 1 for throttle drive (power 
accelerator actuation) -G187- and angle sensor 1 
for throttle drive (power accelerator actuation) -
G188- inform the Engine Control Module (ECM) 
about the position of the throttle valve. Both 
angle sensors are located in the throttle valve 
control module.  
     
Test sequence  
     
-  Connect VAS5051 tester or VAG1551 scan tool 
and select control module for engine electronics 
using "address word" 01   Page 01
-10
. Ignition 
must remain switched on. 
Rapid data transfer 
HELP
Select function XX
    
When indicated on display  
-  Press buttons -0- and -8- to select "Read Measuring Value Block" and 
press -Q- button to confirm input. 
Read measuring value block 
Q
Enter displa
y group number XXX
    
When indicated on display  
-  Press buttons -0-, -6- and -2- to select "display group number 062" and 
press -Q- button to confirm input. 
Read Measuring Value Block 62  
1 
2 
3 
4
    
Indicated on display  
-  Check specified values for E-gas potentiometer voltages in display 
fields 1 and 2. 
Pa
ge 21 of 51 Electronic En
gine Power Control 
(EPC
) (E-Gas
), checkin
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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Page 27 of 51

24-134
       Both the Throttle Position (TP) sensor -G79- and 
the Sender -2- for accelerator pedal position -
G185- are located at the accelerator pedal and 
communicate the driver's intentions to the ECM 
completely independently of each other. Both 
sensors are stored in one housing.  
     
Test sequence  
     
-  Connect VAS5051 tester or VAG1551 scan tool 
and select control module for engine electronics 
using "address word" 01   Page 01
-10
. Ignition 
must remain switched on. 
Rapid data transfer 
HELP
Select function XX
    
When indicated on display  
-  Press buttons -0- and -8- to select "Read Measuring Value Block" and 
press -Q- button to confirm input. 
Read measurin
g value block 
Q
Enter display group number XXX
    
When indicated on display  
-  Press buttons -0-, -6- and -2- to select "display group number 062" and 
press -Q- button to confirm input. 
Read Measuring Value Block 62  
1 
2 
3 
4
    
Indicated on display  
-  Check specified values for E-gas potentiometer voltages in display 
fields 3 and 4. 
Pa
ge 27 of 51 Electronic En
gine Power Control 
(EPC
) (E-Gas
), checkin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.24.4 
Page 39 of 51

24-144
      
Note:  
     For safety reasons, the instruction from the 
accelerator pedal sensor (potentiometer) to the 
ECM to open the throttle valve is suppressed 
when brake is being operated. This requires the 
brake light switch signal and also the brake pedal 
switch signal in the control module. If brake pedal 
is operated with accelerator pedal constantly 
depressed, engine is immediately regulated 
down to idle speed. A faulty switch can lead to 
undesired regulation. 
     
Test sequence  
     
-  Connect VAS5051 tester or VAG1551 scan tool 
and select control module for engine electronics 
using "address word" 01   Page 01
-10
. Ignition 
must remain switched on. 
Rapid data transfer 
HELP
Select function XX
    
When indicated on display  
-  Press buttons -0- and -8- to select "Read Measuring Value Block" and 
press -Q- button to confirm input. 
Read measurin
g value block 
Q
Enter displa
y group number XXX
    
When indicated on display  
-  Press buttons -0-, -6- and -6- to select "display group number 066" and 
press -Q- button to confirm input. 
Pa
ge 39 of 51 Electronic En
gine Power Control 
(EPC
) (E-Gas
), checkin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.24.4 
Page 40 of 51

24-145
 
Read Measuring Value Block 66  
1 
2 
3 
4
    
Indicated on display  
-  Check brake light/brake pedal switch in display field 2.
  
Display fields  
  
1   2   3   4  
Display group 066: Signals to Engine Control Module (ECM)  
Display  xxx km/h  
XXXX  xxx km/h  XXXX  
Indicated  ACTUAL speed  
Switch positions   SPECIFIED speed   Switch positions  
Functional range    
  XX00  
XX11       
Specified value    
XX00  
(with brake pedal not operated)       
    
XX11  
(with brake pedal operated)       
Note    
Value:X = no significance.  
Switch points slightly offset       
Pa
ge 40 of 51 Electronic En
gine Power Control 
(EPC
) (E-Gas
), checkin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.24.4 
Page 46 of 51

24-150
      
Note:  
     This signal helps prevent excessive RPM 
oscillations and tip-in shocks when clutch is 
disengaged and is required for the cruise control 
system. 
     
Test sequence  
     
-  Connect VAS5051 tester or VAG1551 scan tool 
and select control module for engine electronics 
using "address word" 01   Page 01
-10
. Ignition 
must remain switched on. 
Rapid data transfer 
HELP
Select function XX
    
When indicated on display  
-  Press buttons -0- and -8- to select "Read Measuring Value Block" and 
press -Q- button to confirm input. 
Read measuring value block 
Q
Enter displa
y group number XXX
    
When indicated on display  
-  Press buttons -0-, -6- and -6- to select "display group number 066" and 
press -Q- button to confirm input. 
Read Measuring Value Block 66  
1 
2 
3 
4
    
Indicated on display  
-  Check Clutch Pedal Position (CPP) switch in display field 2.
Pa
ge 46 of 51 Electronic En
gine Power Control 
(EPC
) (E-Gas
), checkin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.24.4