engine AUDI A8 1997 D2 / 1.G AHA Engine Throttle Valve Control Module Checking User Guide
[x] Cancel search | Manufacturer: AUDI, Model Year: 1997, Model line: A8, Model: AUDI A8 1997 D2 / 1.GPages: 36, PDF Size: 0.12 MB
Page 23 of 36

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-  Press buttons -0-, -0- and -3- to input display 
group number 3 (003), and press -Q- button to 
confirm input. Read Measuring Value Block 3 1 2 3 4 
    
Indicated on display (1-4 = display fields)  
-  Compare display with specified values for throttle angle, (display field 
3): 
  
Display fields  
  
1   2   3   4  
Display group 3: Load measurement  
Display   xxx RPM   xx.x g/s  
xxx   
xx.x  BTDC  
Indicates   Engine speed  
(in 40 RPM 
steps)  Mass air 
flow  Throttle angle   Ignition timing  
Range   0 - 6800 RPM   ---  
0 - 90    
0.0 - 50.0 
BTDC  
Specified 
value  0 RPM   ---  
0 - 5    
0.0   
  
---   ---   If not as specified   page 24
-146
 , Evaluation of 
display group 3  
---  
- 
Open throttle valve slowly while monitoring degree ( ) value in display field 3.    Value must increase uniformly over the entire range.
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Page 26 of 36

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 Evaluation of display group 3  Display 
group: 3  
  
  
Display field: 
3  
Possible malfunction cause  
Corrective action  
0.0   
 Open circuit or short circuit to B+ in signal wire between throttle position 
sensor -G69- and engine control module 
 Malfunction in Ground for -G69-- Check wiring   page 
24
-147
 
99.0   
 Short circuit to Ground in signal wire between throttle position sensor -G69- 
and engine control module 
 Malfunction in voltage supply for -G69-  
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Page 31 of 36

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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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Test procedure  
     
-  Connect VAG1551 or VAG1552 scan tool and 
press buttons -0- and -1- to insert "Engine 
Electronics" address word 01 (with ignition 
switched on; engine not running)   page 01
-8 . 
Rapid data transfer 
HELP
Select function XX
    
Indicated on display  
-  Press buttons -0- and -4- to select "Basic Setting" function 04, and 
press -Q- button to confirm input. 
System in Basic Settin
g 
HELP
Input displa
y group number XXX
    
Indicated on display  
-  Press buttons -0-, -6- and -0- to input display group number 60 (060), 
and press -Q- button to confirm input. 
System in Basic Setting 60 1 2 3 4 
    
Indicated on display (1-4   display fields)  
Notes: 
After confirming input of display group 60, adaptation is started. The 
Throttle Position (TP)sensor is positioned in the closed throttle, wide 
open throttle and limp-home positions. Following this procedure, other 
intermediate steps will create a characteristic curve of the relationship 
between Throttle Position (TP) sensor -G69- and angle sensor for 
throttle drive -G187-. The Motronic ECM stores these values in permanent memory. 
Afterward, the throttle valve assumes the starting position. 
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