skoda Workshop Repair Guides

Skoda Workshop Service and Repair Manuals

ABOUT US
Self-diagnosis V > < Meaning of the 8-digit numerical block of the readiness code

Octavia Mk1

Generating readiness code
Generating readiness code
If the fault memory has been erased or if the continuous voltage supply from the engine control unit was interrupted, it is then necessary to re-generate the readiness code.
Special tools, test equipment as well as aids required
t  Vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3, 3A, 3B oder 3C-
Test conditions
l  Vehicle stopped
l  On vehicles with an automatic gearbox the selector lever must be in position “P” or “N”
l  all electrical consumers such as e.g. light and rear window heater must be switched off
l  Coolant temperature at least 80 °C ⇒ read measured value block 004, display block 3
l  The intake air temperature must be below 60 °C ⇒ measured value block 004, display field 4.
Procedure
–  Connect vehicle system tester -V.A.G 1552-, switch on ignition and select address word 01 “Engine electronics” → Chapter.
  Note
It is essential to carry out the individual steps in the correct order, otherwise the readiness code cannot be successfully generated.
1. step: Interrogating fault memory
   
Readout on display:
–  Enter function 02 “Interrogate fault memory” and confirm entry with the Q key.
  
Vehicle system test               HELP
Select function XX
The number of stored faults, or “No fault recognised” appears in the display.
If a fault is stored in the memory:
–  Rectify the faults displayed by referring to the fault table → Chapter.
If no fault is stored:
–  Press → key.
2. step: Erasing fault memory
  
X No fault recognised!                  

      

      

    
      

      

    
Readout on display:
– 
          Select function 05 “Erase fault memory” and confirm entry with the Q key.
 
      Note
The readiness code is reset or erased each time the fault memory is erased.

      		 
      
    
Vehicle system test               HELP
Select function XX

      

      

    
      

      

    
Readout on display:
 
      Note
If the ignition is switched off between “Interrogating fault memory” and “Erasing fault memory”, the fault memory is then not erased.
– 
          Press → key.
3. step: Adapting throttle valve control unit to engine control unit
– 
          Select function 04 “Initiate basic setting” and display group 060.

      		 
      
    
Vehicle system test                   ->
Fault memory erased!            

      

      

    
      

      

    
Check values in display fields 3 and 4:
Display field 3: 0...8
Display field 4: ADP runs, ADP o.k.
– 
          End adaptation only after 30 s by pressing the → key.
If one of the above messages appears:
– 
          Inspecting throttle valve control unit  → Chapter.
4. step: Diagnosis of the lambda probe ageing
– 
          Start engine and run in idle.
– 
          Select function 08 “Read measured value block” and display group number 030. 

      		 
      
    
System in basic setting 60            ->
14 %    85 %       8       ADP runs

      

      

    
      

      

    
– 
          Check operating state of lambda control upstream of catalytic converter (display field 1):
Specified value: 111
– 
          Check operating state of lambda control downstream of catalytic converter (display field 2):
Specified value: 111
 
      Note
t 
           This may take a few minutes.
t 
           The first position in the 3-digit numerical block changes between 0 and 1 (lambda probe heater OFF and ON).
t 
           For the status of the lambda control, either a 0 or a 1 can be displayed in the 3-digit numerical block.
t 
           Readout in display fields 1 and  2 is only set to value 1 once the catalytic converter temperature is more than 400°C (⇒ display group 34, display field 2).
t 
           The third position in the display field 2 changes initially between 0 and 1 (the specified value is reached through this).
If the specified value is not reached:
– 
          Interrogate the fault memory  → Chapter.
If the specified value is reached:
– 
          Select function 04 “Basic setting” and display group 034.

      		 
      
    
Reading measured value block         30   ->
       111               111            

      

      

    
      

      

    
Readout on display:
– 
          Actuate brake pedal and hold. Engine speed is raised to 1100... 1400 rpm by engine control unit.
– 
          Maintain this high engine speed until the display read-out in display field 4 changes from “Test OFF” to “Test ON”. Catalytic converter temperature in display field 2 must be at least 400°C.
 
      Note
This may take a few minutes.
– 
          Check period of lambda probe upstream of catalytic converter in display field 3:
Specified value: 0,7...2,00
– 
          Continue to run engine at high speed:
Specification in display field 4: B1-S1- OK.
If one of the above messages appears:
– 
          Interrogate the fault memory  → Chapter.
If one of the above messages appears:
– 
          Press the button C.
High engine speed changes to idling speed.
5. step: Diagnosis of the lambda control system
– 
          Enter code number of the display group 037 and confirm entry with key Q.

      		 
      
    
System in basic setting 34            ->
720 rpm    400.0 °C    1.19    Test OFF

      

      

    
      

      

    
Readout on display:
– 
          Actuate brake pedal and hold.
Engine speed is raised to 1100... 1400 rpm by engine control unit.
– 
          Run engine at higher speed until “Syst. O.K.” is displayed in display field 4.
If one of the above messages appears:
– 
          Interrogate the fault memory  → Chapter.
If one of the above messages appears:
– 
          Press → key.
High engine speed changes to idling speed.
6. step: Diagnosis of catalytic converter
 
      Note
This diagnosis is only ended once there is no fault in the previous diagnosis of the lambda probe ageing.
– 
          Enter code number of the display group 046 and confirm entry with key Q.

      		 
      
    
System in basic setting 37            ->
19.5 %     0.435 V    0.000     Test ON

      

      

    
      

      

    
Readout on display:
– 
          Actuate brake pedal and hold.
Engine speed is raised to 1100... 1400 rpm by engine control unit.
– 
          Maintain this high engine speed until the display read-out in display field 4 changes from “Test OFF” to “Test ON”. Catalytic converter temperature in display field 2 must be at least 400°C.
– 
          Check period of lambda probe upstream of catalytic converter in display field 3:
Specified value: max. 0,50
– 
          Continue to run engine at high speed:
Specification in display field 4: Cat B1 O.K.
If one of the above messages appears:
– 
          Interrogate the fault memory  → Chapter.
If one of the above messages appears:
– 
          Press → key.
High engine speed changes to idling speed.
7. step: Diagnosis of activated charcoal filter system (tank vent system)
 
      Note
The engine must not be switched off during the entire period.
– 
          Select function 04 “Basic setting” and the display group 070.

      		 
      
    
System in basic setting 46            ->
720 rpm    400.0 °C    0.25     Test OFF

      

      

    
      

      

    
After initiating diagnosis of engine control unit the message in display field 4 changes from “Test OFF” to “Test ON”.
– 
          Run engine at idling speed until display field indicates specified value “TEV O.K.”.
If this message is not displayed:
– 
          Interrogate the fault memory  → Chapter.
If this message is displayed:
– 
          Press → key.
8. step: Diagnosis of exhaust gas recirculation system

      		 
      
    
System in basic setting 70            ->
0.0 %     0.0 %                 Test OFF

      

      

    
      

      

    
Readout on display:
– 
          Select function 08 “Read measured value block” and display group 075 .

      		 
      
    
Vehicle system test               HELP
Select function XX

      

      

    
      

      

    
Readout on display:
– 
          Perform brief drive (approx. 3...4 min).
Engine speed must reach at least 1800...3600 rpm, coolant temperature greater than 70 °C.
– 
          Rapidly take your foot off the brake pedal. Through this generate the trailing throttle.
– 
          The readout in the display field 4 switches from “Test OFF” to “Test ON”.
Brake phase must last approx. 8 seconds.
– 
          Check display field 4:
Specified value: Syst. o.k.
If this message is not displayed:
– 
          The brake phase must be repeated a number of times.
If this message is not displayed again:
– 
          Interrogate the fault memory  → Chapter.
If this message is displayed:
– 
          Press → key.
9. step: Reading Readiness Code
– 
          Read out readiness code  → Chapter.

      		 
      
    
Reading measured value block         75   ->
0 mbar     0 mbar      0 mbar   test OFF

      

      

    


Self-diagnosis V >
< Meaning of the 8-digit numerical block of the readiness code