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Adapting engine control unit to throttle valve control part > < Replacing engine control unit

Golf Mk4

Simos injection and ignition system
Engine control unit
Coding engine control unit

Notes:

  • ◆ A 5-character code must always be displayed during the control unit identification.
  • ◆ The control unit must be recoded if the vehicle relevant coding is not displayed or the control unit has been renewed.

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

  • ◆ Fault reader V.A.G 1551 with cable V.A.G 1551/3

Work sequence

  • ‒ Connect the fault reader V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control unit with the "Address word" 01.
    (Connecting fault reader and selecting engine control unit .)
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Press keys 0 and 7 for the function "Coding control unit" and confirm entry with Q key.
 
→ Indicated on display:
Coding control unit     Q
Enter code number XXXXX     (0-32000)
  • ‒ Enter the relevant code number for this vehicle and confirm with Q key.

Coding variants for engine control unit▸05.99

Coding

For vehicles with

04000

Manual gearbox

04030

Auto. gearbox

Coding variants for engine control unit 05.99▸(model year 2000)

Vehicle/exhaust

Special code

CAN Data bus

Gearbox

00 =

No coding

0 =

No coding

0 =

ABS and airbag not available or without data bus

0 =

01 =

1 =

1 =

ABS with data bus

1 =

5-speed manual gearbox

02 =

2 =

2 =

Airbag with data bus

2 =

03 =

3 =

3 =

ABS and airbag
with data bus

3 =

Automatic gearbox

04 =

4 =

4 =

4 =

05 =

5 =

5 =

5 =

06 =

6 =

6 =

6 =

The code number is compiled as shown in the following example:

5-speed manual gearbox:

1

ABS and airbag with data bus

3

Special code presently no coding

0

Vehicle/exhaust presently no coding

00

Code number:

00

0

3

1
 
→ Indicated on display when a non-authorised code number has been entered.
Function is not recognised or cannot     ⇒
be performed at the moment.
 
→ The control unit identification and coding will appear on the display, e.g.:
06A906019 1.6L R4/2V SIMOS HS 2272⇒
Coding 04000     WSC XXXXX
  • ‒ Press ⇒ key.
  • ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.

Note:

The code unit entered and shown on the display will not be used by the engine control unit until the ignition has been switched off for at least 15 minutes.

An incorrect coding leads to:

  • ◆ Engine running faults
  • ◆ Increased fuel consumption
  • ◆ Increased emissions
  • ◆ Faults stored in fault memory which are not actually present
  • ◆ Reduced gearbox life

Adapting engine control unit to throttle valve control part > < Replacing engine control unit