air condition AUDI A8 2000 D2 / 1.G AHA Engine Throttle Valve Control Module Checking Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 2000, Model line: A8, Model: AUDI A8 2000 D2 / 1.GPages: 36, PDF Size: 0.12 MB
Page 6 of 36

24-132
      
Closed Throttle Position (CTP) switch, 
checking
 
     
Note:  
     The Closed Throttle Position (CTP) switch -F60- 
is inside the throttle valve control module -J338-. 
     
Test conditions  
     
Throttle valve in closed throttle position; if 
necessary adjust accelerator pedal cable 
     
       Repair Manual, Fuel Supply System, Repair 
Group 20
   
     
Cruise control adjustment OK 
     Power supply for throttle valve control 
module OK; checking   page 24
-130
 
     
Checking  
     
-  Connect VAG1551 or VAG1552 scan tool and 
press buttons -0- and -1- to insert "Engine 
Electronics" address word 01 (with engine 
running at idle)   page 01
-8 . 
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Page 8 of 36

24-133
      
-  Press buttons -0-, -0- and -5- to input display 
group number 5 (005), and press -Q- button to 
confirm input. Read Measuring Value Block 5 1 2 3 4 
    
Indicated on display (1-4 = display fields)  
-  Check Closed Throttle Position (CTP) switch (display field 4):
  
Display fields  
  
1   2   3   4  
Display group 5: Engine electronics  
Display   xxx RPM   xx.xx ms   xxx km/h   Idle  
Part throt  
Full throt  
Decel  
Enrich  
Indicates   Engine speed  
(in 40 RPM steps)  Engine load   Vehicle speed   Operational condition  
Range   0 - 6800 RPM   0.00 - 12.75 ms   ---   ---  
Specified value   620 - 740 RPM  
(all-wheel drive)  1.00 - 2.50 ms   0 km/h   Throttle closed: "Idle"  
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Page 12 of 36

24-136
      
Throttle drive and angle sensor for 
throttle drive, checking
 
     
Note:  
     Throttle drive -G186- and angle sensor -1- for 
throttle drive -G187- are located in the throttle 
valve control module -J338-. 
     
Test conditions  
     
Throttle valve in closed throttle position; if 
necessary adjust accelerator pedal cable 
     
       Repair Manual, Fuel Supply System, Repair 
Group 20
   
     
Cruise control adjustment OK 
     Power supply for throttle valve control 
module OK; checking   page 24
-130
 
     
Engine coolant temperature at least 80 C 
(176 F) 
     
Automatic transmission selector lever in "P" 
or "N" 
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Page 14 of 36

24-138
 
  
Display fields  
  
1   2   3   4  
Display group 55: Idle control  
Display   xxx RPM   x.xx g/s   x.xx g/s   xxxx  
Indicates   Engine speed RPM  
(in steps of 10 RPM)  Regulating value-idle mass air 
flow (idle air control)  Learning value-idle 
mass air flow  Operating 
conditions  
Range   0 - 2550 RPM   -2.78 to +2.85 g/s   -1.67 to +3.34 g/s   ---  
Specified 
value  620 - 740 RPM  
(all-wheel drive)  
or  
740 - 860 RPM  
(front-wheel drive)  -1.39 to +1.39 g/s   -1.39 to +1.39 g/s   0000  
(all-wheel drive)  
and/or  
0100  
(front-wheel 
drive)  
  
If engine speed is NOT OK   page 
24
-141
 , Continuation  
If display is NOT OK   page 24
-139
 , Evaluation of 
display group 55  
Explanation   
 page 24
-140
 
  
      If displayed values are OK:  
     
- 
Press  button.
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Page 21 of 36

24-143
      
Throttle Position (TP) sensor, checking
 
     
Note:  
     The Throttle Position (TP) sensor -G69- is 
located inside the throttle valve control module -
J338-. 
     
Test conditions  
     
Throttle valve in closed throttle position; if 
necessary adjust accelerator pedal cable 
     
       Repair Manual, Fuel Supply System, Repair 
Group 20
   
     
Cruise control adjustment OK 
     Power supply for throttle valve control 
module OK; checking   page 24
-130
 
     
Checking  
     
-  Connect VAG1551 or VAG1552 scan tool and 
press buttons -0- and -1- to insert "Engine 
Electronics" address word 01 (with ignition 
switched; engine not running)   page 01
-8 . 
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Page 31 of 36

24-150
      
Throttle valve control module, 
adaptation to Engine Control Module 
(ECM)
 
      If the throttle valve control module -J338- is 
removed and installed, or replaced, adaptation of 
the throttle valve control module to the Motronic 
ECM is required.  
      During "adaptation" with ignition switched on and 
the engine not running, the Motronic ECM 
"learns" the closed throttle position (CTP), wide 
open throttle (WOT) and other positions of the 
throttle valve control module, and a characteristic 
curve of the relationship between Throttle 
Position (TP) sensor -G69- and angle sensor for 
throttle drive -G187-.  
     
Required special tools and test equipment  
     
VAG1551 or VAG1552 Scan Tool (ST) with 
VAG1551/3 adapter cable 
     
Test conditions  
     No malfunctions stored in DTC memory   
page 01
-16
 
     
Throttle valve in closed throttle position; if 
necessary adjust accelerator pedal cable 
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Page 34 of 36

24-152
      
-  Compare display with specified values (display 
fields 1-4): 
  
Display fields  
  
1   2   3   4  
Display group 60: Basic setting-throttle valve control module  
Display  
xxx   
xxx   
Idle  
Part throt  
Full throt  
Decel  
Enrich  ADP runs  
ADP. OK  
ADP. ERROR  
Indicates   Throttle valve 
angle  Throttle drive 
angle  Operating 
condition  Adaptation condition  
Range  
0 - 90    
---   ---   ---  
Specified 
value  1 - 10    
(automatic trans.)  
1 - 20    
(manual trans.)  ---   Idle   ADP. runs  
  
0 - 5    
0 - 5    
Idle   ADP. OK  
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