audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Mixture preparation system, electronic inj.,Gas > < Adaptation

A4 Mk1

MPI fuel injection and ignition system
Adaptation
CO adjustment on vehicles not fitted with lambda probes

Notes:

  • ◆ In the "Adaptation" function, the engine control unit executes the same operations as in function 04 "Basic setting" .
  • ◆ The "Adaptation" function sets the CO content on vehicles with no lambda probes.
  • ◆ Channels 01 and 02 can be selected; channel 01 is used to set the CO content on vehicles with no lambda probe, whilst channel 02 has no function.
  • ◆ If the stored adaptation values are altered on vehicles with lambda probes by entering different adaptation values, this has no effect on the fuel injection and ignition system.

Work sequence

  • ‒ Connect up vehicle diagnosis, measurement and information system VAS 5051 or fault reader V.A.G 1551 and select engine electronics control unit with "Address word" 01 => Page 01-3.
    When doing this the engine must be running at idling speed.
 
→ Indicated on display:
Rapid data transfer    HELP
Select function XX
  • ‒ Enter "10" to select the function "Adaptation" and confirm entry with Q key.
 
→ Indicated on display:
Adaptation
Enter channel number XX
  • ‒ Enter "01" to select "adaptation channel 01" and confirm entry with Q key.
 
→ The last stored adaptation value is displayed
Channel 1    Adaptation 128    ⇒
    

Notes:

  • ◆ Adaptation value 128 is the mean value stored at the factory.
  • ◆ Reducing the value of 128 signifies leaning (CO content decreases), whilst increasing the value signifies enrichment (CO content increases).
  • ◆ Any change in adaptation value must remain within the tolerance range of 110 ...150 .
  • ◆ Adaptation can be performed in stages => Page 01-155.

A- Step-by-step adaptation

Notes:
 
→ <- 1: Adaptation value is reduced in steps by pressing key 1.
Channel 1    Adaptation 128    ⇒
    
  • ◆ 3 ->- 3: Adaptation value is increased in steps by pressing key 3.
    • ‒ Press the ⇒key.
     
    → Indicated on display:
    Channel 1    Adaptation 128    ⇒
        
    • ‒ Press key 1 for "Rapid data transfer".
     
    → Indicated on display:
    Channel 1    Adaptation 127    Q
    1    2    3    4    5    6    7    8    9    10
    • Adaptation value decreases

    or
     
    → Indicated on display:
    Channel 1    Adaptation 129    Q
    1    2    3    4    5    6    7    8    9    10
    • Adaptation value increases

    Notes:

    • ◆ The display shows the corresponding adaptation values, as well as the 10 measured values from display group 000.
    • ◆ If modified adaptation is not to be stored, press the C key to return to previous display.
    • ‒ Confirm entry with Q key.
     
    → Indicated on display:
    Channel 1    Adaptation 129    Q
    Store changed value?
    • ‒ Confirm entry with Q key.
     
    → Indicated on display:
    Channel 1    Adaptation 129    ⇒
    Changed value is stored
    • ‒ Terminate adaptation by pressing the ⇒ key.
     
    → Indicated on display (function selection):
    Rapid data transfer     HELP
    Select function XX

    B- Direct adaptation
     
    → Indicated on display:
    Channel 1    Adaptation 128    ⇒
        
    • ‒ Press the ⇒key.
     
    → Indicated on display:
    Channel 1    Adaptation 128    Q
    Enter adaptation value XXXXX
    • ‒ Enter desired 5-digit adaptation value
      eg 120 = 00120
     
    → Indicated on display:
    Channel 1    Adaptation 128    Q
    Enter adaptation value 00120
    • ‒ Confirm entry with Q key.
     
    → Indicated on display:
    Channel 1    Adaptation 120    Q
    1    2    3    4    5    6    7    8    9    10

    Notes:

    • ◆ The display shows the corresponding adaptation values, as well as the 10 measured values from display group 000.
    • ◆ If modified adaptation is not to be stored, press the C key to return to previous display.
     
    → Indicated on display:
    Channel 1    Adaptation 120    Q
    Store changed value?
    • ‒ Confirm entry with Q key.
     
    → Indicated on display:
    Channel 1    Adaptation 120    ⇒
    Changed value is stored
    • ‒ Terminate adaptation by pressing the ⇒ key.
     
    → Indicated on display (function selection):
    Rapid data transfer     HELP
    Select function XX

    Mixture preparation system, electronic inj.,Gas > < Adaptation