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Replacing Motronic control unit > < Display groups 08 - 98

A4 Mk1

Motronic Injection and Ignition System (4 cyl.)>06.96
Motronic self-diagnosis
Perform basic setting of engine

Notes:

  • ◆ All learned values in the control unit are deleted when the connector on the Motronic control unit is disconnected or when the battery is disconnected. This may be followed by rough idling for a brief period. In this case, leave the engine idling for several minutes until learning process has been completed.
  • ◆ Learning is prohibited as soon as a fault affecting the lambda control has been stored in the fault memory (does not apply to sporadic faults).
  • ◆ The basic setting is performed with the engine running.
  • ◆ The specified values and display ranges are identical with the function 08, Read measured value block.
  • ◆ The basic setting of the throttle valve control part (via Display group 98) is described in Repair Group 24 under "Checking throttle valve control part".
  • ◆ Display group 99 is used to switch off the lambda control in the Basic setting function. This makes it possible to check whether any change occurs by switching the lambda control off or on when dealing with handling problems. It is possible to switch back and forward in the selected display group between the functions "Read measured value block" and "Basic setting" using the keys 4 and 8.
  • ◆ After function 04 has been selected the Motronic control unit carries out the following operations:
    • ‒ ACF valve is closed.
    • ‒ Air-conditioner compressor is deactivated

Preconditions:

  • ◆ Engine temperature at least 80 oC.
  • ◆ Accelerator not depressed.
  • ◆ All electrical loads off.
  • ◆ Air conditioning switched off.
  • ◆ Vehicles with automatic gearbox: Selector lever set to P or N.
  • ◆ No faults stored in fault memory
  • ‒ Interrogate and erase fault memory - Page 01-8. No faults must be stored (if necessary, rectify fault, delete fault memory, switch off and re-start engine, perform test drive and interrogate the fault memory again as a check).
  • ‒ Leave engine idling.
 
→ Display:
Rapid data transfer     HELP
Select function XX

Note:

Press HELP key to obtain a printout of available functions.

  • ‒ Press keys 0 and 4
    (04 is used to select the function "Basic Setting")
 
→ Display:
Rapid data transfer     Q
04 - Start basic setting    
  • ‒ Confirm entry with Q key.
 
→ Display:
Start basic setting     Q
Enter Display group number XX
  • ‒ Select the required display group number from the display group overview in the "Read measured value block" section.

Note:

Display group number 01 is used here as an example to demonstrate the procedure.

  • ‒ Press keys 0 and 1
    (01 is used to select the function "Display group number 01")
 
→ Display:
Start basic setting     Q
Enter display group number    01
  • ‒ Confirm entry with Q key.
 
→ Display:
Basic setting    1     ⇒
1    2    3    4

Notes:

  • ◆ In display group 00 the measured values are shown in decimal form.
  • ◆ Each time the PRINT key is pressed, the current display readout is printed out.
  • ◆ Press the C key before selecting further display groups.
  • ‒ If the specified values are achieved in all display zones, press the ⇒key.
 
→ Display:
Rapid data transfer     HELP
Select function XX
  • ‒ Press keys 0 and 6
    (06 is used to select the function "End output")
 
→ Display:
Rapid data transfer     Q
06 - End output
  • ‒ Confirm entry with Q key.
 
→ Display:
Rapid data transfer     HELP
Enter address word XX

Replacing Motronic control unit > < Display groups 08 - 98