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Transporter T3
(1979-1992)
Transporter T4
(1990-2003)
Technical data of the Digifant system
Main
Transporter
Transporter T4
Power unit
Injection system (petrol)
Technical data of the Digifant system
0
Engine code
AAS
AAF
Engine power
84 hp.
110 hp.
Limit turns
5300 rpm
5500 rpm
idle speed
800±25 rpm
800±25 rpm
CO content
0.7±0.2 vol. % (up to 5/93)
0.3±1.2 vol. % (up to 6/93)
0.7±0.2 vol. % (up to 12/92)
0.3±1.2 vol. % (up to 1/93)
Idle stabilization
Valve resistance
2 - 10 ohm
2 - 10 ohm
Control current
Coolant thermostat plug removed
420 + 30 mA continuous
420±30 mA continuous
Coolant thermostat plug connected
420±30mA fluctuates
420±30mA fluctuates
Depending on the load, if the electrical consumers are on
400 - 1000 mA
400 - 1000mA
Throttle lever position at idle
5 – 30
5 – 30° (up to 9/91) 0° (from 10/91)
Throttle lever position at full throttle
at least 100°
at least 100° (up to 9/91)
at least 80° (from 10/91)
Fuel pressure control
Fuel pressure at idle speed:
- Vacuum hose attached
approx. 2.5 barg, press.
approx. 2.5 barg, press.
- Vacuum hose removed
approx. 3.0 barg, press.
approx. 3.0 barg, press.
Holding pressure after 10 minutes
at least 2.0 bar overpressure
at least 2.0 bar overpressure
injection valves
Injection jet
Resistance per valve
Same for all valves
the same for all valves
Connection resistance for all valves:
– 4 valves in good condition
15 - 20 ohm
1 5 - 20 ohm
– 3 valves in good condition
3.7 - 5.0 ohm
–
– 2 valves in good condition
5.0 - 6.7 ohms
–
– 1 valve in good condition
7.5 - 10 ohm
–
– 5 valves in good condition
1 5 - 20 ohm
3.0 - 4.0 ohm
LED indicator test
Test condition: Hall sensor is in good condition, the injection valve plug is removed, the starter is turned on
LEDs flash
LEDs flash
CO potentiometer
Resistance between pins 1 and 3
Note: The resistance depends on the position of the CO adjusting screw
0 - 2 kOhm (up to 5/93)
0 - 2 kOhm (up to 12/92)
Idle switch
Throttle closed
Max. 10 ohm (since 6/93)
Max. 10 ohm (from 1/93)
Throttle open
Resistance is infinite.
Resistance is infinite.
Throttle damper
gaps
- verification
1.5 - 2.5 mm (up to 5/93)
1.5 - 2.5 mm (up to 12/92)
- adjusting
2.0 mm (up to 5/93)
2.0 mm (up to 12/92)
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Previous articles
Checking the intake air heating
Temperature sensor resistance value
Idling switch
Checking injection valves
Injection valves — removal and installation
Throttle damper
Idle stabilization
Checking idling and CO content
Gasoline injection system — general information
Next articles
Diagnostics of malfunctions of the fuel injection system Digifant
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Volkswagen Transporter 1990-2003: Technical data of the Digifant system
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Article about car repair Volkswagen Transporter 1990-2003: Technical data of the Digifant system https://www.vwmanual.ru/en/transporter/t4/power/injector/tehnicheskie-dannye-sistemy-digifant
[url=https://www.vwmanual.ru/en/transporter/t4/power/injector/tehnicheskie-dannye-sistemy-digifant]Volkswagen Transporter 1990-2003: Technical data of the Digifant system[/url] - article on website about car repair Volkswagen www.VWmanual.ru
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Transporter T4
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