engine AUDI A6 1997 C5 / 2.G AHA Engine Readiness Code Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1997, Model line: A6, Model: AUDI A6 1997 C5 / 2.GPages: 29, PDF Size: 0.08 MB
Page 1 of 29

01-70
 
     
Readiness code 
     
Readiness code, checking
 
     
Note:  
     The readiness code will be erased: 
     
When Diagnostic Trouble Code (DTC) memory 
is erased 
     When the Engine Control Module (ECM) 
harness connector is disconnected (e.g. to 
connect VAG1598/22 test box) 
     When the battery is disconnected
     
Required special tools and test equipment  
     VAG1551 Scan Tool (ST) with VAG1551/3 
adapter cable 
     
Checking  
     
-  Connect VAG1551/VAG1552 Scan Tool (ST) 
and press buttons -0- and -1- to insert "Engine 
Electronics" address word 01 (with ignition 
switched on)   page 01
-8 . 
Rapid data transfer 
HELP
    
Indicated on display  
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01-73
      
Readiness code, generating
 
     
Required special tools and test equipment  
     
VAG1551 Scan Tool (ST) with VAG1551/3 
adapter cable 
     
Test requirements  
     No malfunctions stored in DTC memory 
     Engine not stopped (ignition not switched off) 
during the test 
     Vehicle not moving 
     All electrical consumers switched off (coolant 
fan must not run during test) 
     
Test sequence  
     
-  Connect VAG1551/VAG1552 Scan Tool (ST) 
and press buttons -0- and -1- to insert "Engine 
Electronics" address word 01 (with ignition 
switched on)   page 01
-8 . 
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Page 6 of 29

01-74
      
Step 1: Check DTC memory Rapid data transfer 
HELP
Select function XX
    
Indicated on display  
-  Press buttons -0- and -2- to select "Check DTC Memory" function 02, 
and press -Q- button to confirm input. 
No DTC reco
gnized
    
Indicated on display  
If one or more DTCs are stored:  
 Safety precautions for road testing vehicle page 24
-9   
If no DTCs were recognized:  -  Repair cause of malfunction.
-  Erase DTC memory. 
-  Stop engine, start engine again, and road test.
-  Check DTC memory again and erase.
- 
Press  button.
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Page 9 of 29

01-77
      
-  Check specified values in display fields 3 and 
4: 
  
Display fields  
  
1   2   3   4  
Display group 60: Adaptation of throttle valve control module to Engine Control Module (ECM)  
Display  
xxx   
xxx   
Idle  
Part Throt  
Full Throt  
Decel  
Enrich  ADP.runs  
ADP. OK  
ADP.ERROR  
Indicated   Throttle valve angle   Throttle drive angle   Operating condition   Adaptation status  
Specified value   ---   ---   Idle   ADP. OK  
      If "ADP. ERROR" is indicated in display field 4:  
     
-  Check DTC memory   page 01
-16
 .
      If the specified value "ADP. OK" is indicated in 
display field 4:  
     
- 
Press  button.
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01-78
      
Step 4: 
     
-  Start engine and let run at idle.
     
Step 5: Oxygen Sensor (O2S) control 
operating condition Rapid data transfer 
HELP
Select function XX
    
Indicated on display  
-  Press buttons -0- and -8- to select "Read Measuring Value Block" 
function 08, and press -Q- button to confirm input. 
Read Measurin
g Value Block 
HELP
Input display group number XXX
    
Indicated on display  
-  Press buttons -0-, -3- and -0- to input display group number 30 (030), 
and press -Q- button to confirm input. 
Read Measuring Value Block 30  
1 
2 
3 
4 
    
Indicated on display (1-4   display fields)  
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01-79
      
-  Increase engine speed to 1800-2200 RPM.
     
-  Hold at 1800-2200 RPM until specified value 
"111" is shown in all of display fields 1 - 4 (  
table). 
  
Display fields  
  
1   2   3   4  
Display group 30: Oxygen Sensor (O2S) control operating condition, Bank 1 and Bank 2  
Display   xxx   xxx   xxx   xxx  
Indicated   Status of Heated Oxygen 
Sensor (HO2S), bank 1, 
sensor 1, before TWC  Status of Heated Oxygen 
Sensor (HO2S) 2, bank 1 
sensor 2, after TWC  Status of Heated Oxygen 
Sensor (HO2S), bank 2, 
sensor 1, before TWC  Status of Heated Oxygen 
Sensor (HO2S) 2, bank 2 
sensor 2, after TWC  
Specified 
value  111   111   111   111  
Evaluation  page 01
-80
   
      If one of the specified values is not indicated:  
     
-  Check DTC memory   page 01
-16
 .
      If the specified values for display fields 1-4 are 
not indicated:  
     
-  Continue to hold engine speed at 1800-2200 
RPM. 
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01-80
      
Explanation of 3-digit value in display fields 1 
and 2:  
     
When display = 1  
1  
2  
3  
  
      1   Oxygen Sensor (O2S) control active  
   1      Heated Oxygen Sensor (HO2S) 
operational  
1         Oxygen Sensor (O2S) heater ON  
     
Step 6: Oxygen sensor aging (time period) 
     
-  Press button -4- to select "Basic Setting" 
function 04. 
     
-  Press button -3- four times to advance to display 
group number 34. System in Basic Setting 34  
1 
2 
3 
4
    
Indicated on display (1-4   display fields)  -  Hold engine speed at 1800-2200 RPM until display changes from "Test 
OFF" to "Test ON" in display field 4. 
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01-81
      
-  Continue to hold at 1800-2200 RPM until 
specified value "B1-S1. OK" is indicated in 
display field 4. 
  
Display fields  
  
1   2   3   4  
Display group 34: Oxygen sensor aging, Bank 1 (time period of oxygen sensor)  
Display   xxxx RPM   xx.xx ms   xx.xx s   Test OFF/Test 
ON  
B1-S1 OK/  
B1-S1 n. OK  
Indicated   Engine speed  
(increments of 40 
RPM)  Engine load   Time period of HO2S before TWC, bank 1, 
sensor 1  Diagnostic status 
  
Diagnostic result  
Range   0-6800 RPM   0.00-12.75 
ms  0.00-5.00 s   ---  
Specified 
value  1800-2200 RPM   0.80-2.00 ms   0.20-2.10 s   B1-S1 OK        If "B1-S1 n. OK" is indicated in display field 4:  
     
-  Check DTC memory   page 01
-16
 .
      If the specified value "B1-S1 OK" is indicated in 
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Page 14 of 29

display field 4:  
     
-  Continue to hold engine speed at 1800-2200 
RPM. 
     
-  Press button -3- once to advance to display 
group number 35. 
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01-82
 
System in Basic Setting 35  
1 
2 
3 
4
    
Indicated on display (1-4   display fields)  -  Hold engine speed at 1800-2200 RPM until display changes from "Test 
OFF" to "Test ON" in display field 4. 
-  Continue to hold at 1800-2200 RPM until specified value "B2-S1 OK" is 
indicated in display field 4. 
  
Display fields  
  
1   2   3   4  
Display group 35: Oxygen sensor aging, Bank 2 (time period of 
oxygen sensor)  
Display   xxxx RPM   xx.xx 
ms  xx.xx s   Test 
OFF/Test 
ON  
B2-S1 OK/  
B2-S1 n. 
OK  
Indicated   Engine speed 
(increments of 40 
RPM)  Engine 
load  Time period of 
HO2S before 
TWC, bank 2, 
sensor 1  Diagnostic 
status  
Diagnostic 
result  
Range   0-6800 RPM   0.00-
12.75 
ms  0.00-5.00 s   ---  
Specified  1800-2200 RPM   0.80- 0.20-2.10 s   B2-S1 OK  
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