engine AUDI A8 1996 D2 / 1.G ATQ Engine Ignition System Checking Owner's Guide
[x] Cancel search | Manufacturer: AUDI, Model Year: 1996, Model line: A8, Model: AUDI A8 1996 D2 / 1.GPages: 65, PDF Size: 0.53 MB
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       If specified values are not obtained:  
     
Checking wire connections between 
Camshaft Position (CMP) sensor and Engine 
Control Module (ECM)  
     
-  Connect VAG1598/31 test box at wiring harness 
to ECM, do not connect ECM   Page 24
-17
 . 
    
Camshaft Position (CMP) Sensor 2 -G40- (bank 2)  
Camshaft Position (CMP) Sensor 2 -G163- (bank 1)   -  Check the following wire connections for open circuit and short circuit 
to Ground (GND) and B+: Harness connector  
Terminal  
VAG1598/31 test box  
Socket  
1 (B+)   98  
2 (signal)   86  
3 (Ground -GND-)   108  
Harness connector  
Terminal  
VAG1598/31 test box  
Socket  
1 (B+)   98  
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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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Misfire recognition, checking
 
     
Test sequence  
     
-  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" 
function 08. Press -Q- button to confirm input. 
Read Measuring Value Block 
Q
Input displa
y group number XXX
    
When indicated on display:  
-  Press buttons -0-, -1- and -4- to select "display group number 014" and 
press -Q- button to confirm input. 
Read Measuring Value Block 14  
1 
2 
3 
4
    
When indicated on display:  
-  Check misfire recognition in display fields 3 and 4.
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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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Page 65 of 65

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 Evaluation display group 014, display field 3 and display group 015 and 016, display fields 1, 2 and 3  
Indicated on 
display  
Possible cause  
Corrective action  
greater than 15  
 
spark plug defective
 spark plug connector defective
 Ignition coil or power output stage faulty- Check spark plugs and ignition wires with connectors.
- Check ignition coils and power output stages   Page 
28
-7 
  
 
Fuel injector faulty- Check fuel injectors   Page 24
-36
  
 
Poor compression of one or more 
cylinders 
 Repair Manual, Engine Mechanical, Repair Group 
15  - Check compression pressure:
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