Digifant II

Digifant II was the secondin a line of Digifant injection systems (Digijet was Volkswagen's first electronic injection system, then Digifant I, which is very similar to Digifant II, were both used on the Vanagon in the early 80s). Unlike Digijet, it integrates digital ignition control as well. It is full electronic, and uses individual electronically controlled injectors, which are batch-fired. It has integrated fault memory and diagnosis, and was equipped with an OBD fault warning light in California models before the more emissions-specific Digifant I was released. Digifant II receives information from the hall generator (provides engine speed), the air flow sensor (provides engine load), the coolant temperature sensor, the air intake temperature sensor, the oxygen sensor, basic throttle position, and the knock sensor to adjust the fuel/air mixture. Unlike Jetronic or Motronic, the engine control unit has full control of the fuel mixture, taking into account engine load and speed, and referencing a map to produce a value for injector timing (all injectors are wired in parallel and are batch fired). Adjustments are made for a cold engine, high load (A/C), idle, or full throttle. Ignition timing is referenced in the same way, taking into account knock, in addition to load and speed.

Corrado G60 engines also use this same connector, referred to as "Digifant I", but is not related to the California emissions Digifant I. It has the same pin-out as Digifant II, though with boost enrichment, and a CO potentiometer rather then a mass airflow sensor.
A2Resource > Electrical Systems > Management > Digifant II Pinout

Digifant II Engine Controller:

Pin Function Color- USA Golf Color- CE1 Digifant Color- CE2 Digifant
1 Starter Power Black/Red Red Red/Green
2 Oxygen Sensor Green Green Green
3 Fuel Pump Brown/Green Red/Yellow Red/Yellow
4 Knock Sensor Violet/White Yellow Yellow
5 Knock Sensor Black/Red Black Black
6 Ground for sensors Gray/Yellow Brown/White Brown/White
7 Knock Sensor shield Braided Wire Braided Wire Braided Wire
8 Distributor Pin 3 (positive) Brown/Black Red/Black Red/Black
9 Intake Air Temperature Sensor Red/White Blue/White Blue/White
10 Coolant Temperature Sensor Blue/Yellow Brown/Green Brown/Green
11 Idle/WOT Switch Blue/White Red/Blue Red/Blue
12 Injector Power White/Black Red Brown/Yellow
13 Ground - Brown Brown
14 Power from Control Unit Relay Green/White Black/Yellow Black/Yellow
15 - - - -
16 A/C compressor signal Brown/Blue Green Green
17 Airflow Sensor Potentiometer Gray/Green Blue/Black Blue/Black
18 Distributor Pin 2 (hall sender) Green/White Green/White Green/White
19 Ground Brown Brown/Black Brown/Black
20 Malfunction Light/Switch Blue/Brown White/Red White/Red
21 Airflow Sensor Potentiometer White/Yellow Blue/Red Blue/Red
22 Idle Stabilizer Valve Brown/Red White Yellow
23 Idle Stabilizer Valve Green/Red Yellow White
24 - - - -
25 To Ignition Control Unit Green/Blue Green Green

Ignition Controller (Digifant II only):

Pin Function Color (US Golf) Color (CE1/CE2)
1 Coil Pin 1 Green/Blue Red/Black
2 Ground Brown Brown/White
3 - - -
4 Start/Run power Yellow Black
5 - - -
6 To Digifant ECU Green/Blue Green
7 - - -

Digifant I G60 Engine Controller:

Pin Function Color- 1990 G60 Color- 1991 G60 Color- 1992 G60
1 Starter Power Red/Green Red/Green Red/Green
2 Oxygen Sensor Green Violet Violet
3 Fuel Pump Red/Yellow Yellow/Blue Yellow/Blue
4 Knock Sensor White White White
5 CO Potentiometer Blue Blue Blue
6 Ground for sensors Brown/White Brown/White Brown/White
7 Knock Sensor shield and ground Braided Wire and Brown Black and Yellow Black and Yellow
8 Distributor Pin 3 (positive) Red/Black Red/Black Red/Black
9 Intake Air Temperature Sensor Blue/White Blue/White Blue/White
10 Coolant Temperature Sensor Brown/Green Brown/Green Brown/Green
11 Idle/WOT Switch Red/Blue Red/Blue Red/Blue
12 Injector Power Red Brown/Yellow Brown/Yellow
13 Ground Brown Brown Brown
14 Power from Control Unit Relay Black/Yellow Black/Yellow Black/Yellow
15 Fuel Enrichment Switch Blue/Black Blue/Black Blue/Black
16 A/C compressor signal Green Green Green
17 Airflow Sensor Potentiometer - - -
18 Distributor Pin 2 (hall sender) Green/White Green/White Green/White
19 Ground Brown/Black Brown/White Brown/White
20 Malfunction Light/Switch Yellow - -
21 A/T Controller - Yellow/Red Yellow/Red
22 Idle Stabilizer Valve White White White
23 Control Unit Relay Turn-On Black/White - -
24 Tachometer signal to cluster - - Green/Yellow
25 To Ignition Coil Pin 1 Green Green Green