wheel AUDI A8 1999 D2 / 1.G ATQ Engine Ignition System Checking Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1999, Model line: A8, Model: AUDI A8 1999 D2 / 1.GPages: 65, PDF Size: 0.53 MB
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 Technical data, ignition
 
Engine identification  
ATQ (2.8 L / 5V/ 147 kW-engine)  
Idle speed  
Engine speed cannot be adjusted, it is regulated by idle stabilization  720 to 820 RPM (front wheel drive)  
630 to 730 RPM (all wheel drive)  
Engine speed (RPM) limitation  
via fuel injector shut-off    
about 6800 RPM  
Ignition timing is determined in the control module  
It is not possible to adjust the ignition timing    
Ignition system   Dual-spark ignition system with three ignition coils  
Spark plugs   Tightening torque 30 Nm.  
Firing sequence   1-4-3-6-2-5  
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-  Repair open circuit or short circuit if 
necessary. 
     
-  If, after erasing DTC memory for the sake of the 
test, a DTC relating to the Camshaft Position 
(CMP) sensor (hall sensor) is indicated again, 
even though all previous tests were OK, the 
following malfunction is possible: 
     
 
Shutter wheel for Camshaft Position (CMP) 
sensor is not aligned properly. 
     
Check phase position of Camshaft Position 
(CMP) sensor  
     
-  Connect VAS5051 tester or VAG1551 scan tool 
and select the control module for engine 
electronics using "address word" 01   Page 01
-
9 . 
     
   Engine must run at idle for this.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
Input display group number XXX
    
When indicated on display:  
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Display fields  
  
1   2   3   4  
Display group 093: Phase position of Camshaft Position (CMP) sensor bank 1 and bank 2 with engine at idle.  
Display   xxx /min   xx %  
KW  
KW  
Indicated  Engine 
speed  Engine 
load  Phase position 
Bank 1  Phase position 
Bank 2  
Functional 
range  630 to 6800 
RPM  12 to 100 
%  -20 to 15  KW  
-20 to 15  KW  
Specified 
value  720 to 820 
RPM 
1)  
630 to 730 
RPM 2)  12 to 26 
%  -20 to 15  KW  
-20 to 15  KW  
Notes  
  
If specified values are not reached, unscrew Camshaft Position (CMP) 
sensor and check whether shutter wheel is mounted properly at camshaft 
(if mounted improperly, locking lug will get squished when mounting bolt is 
tightened).  
 Repair Manual, Engine, Mechanical, Repair Group 13, removing and installing 
toothed belt  - Also check engine timing
1) Front Wheel Drive Vehicles  2) All-Wheel Drive Vehicles  
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Display fields  
  
1   2   3   4  
Display group 014: Misfire recognition  
Display   xxxx/min   xxx %  
xxx  
---  
Indicated  Engine speed 
(RPM)  Load  
Number of combustion misfires  
Misfire 
recognition  
Functional 
range  670 to 6800 
RPM  12 to 
100 %    
activated  
locked  
Specified 
value  720 to 820 
RPM 
1)  
630 to 730 
RPM 2)  12 to 26 
%  0 to 12  
activated  
Notes       
If the specified value is exceeded: Check combustion 
misfires of the individual cylinders   Page 28
-54
   
  
1) Front Wheel Drive Vehicles  2) All-Wheel Drive Vehicles  
      If specified value is obtained:  
     
- 
Press button.Rapid data transfer 
HELP
    
Indicated on display (function selection):  
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