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Home >> Volkswagen >> 1991 >> Jetta L4-1781cc 1.8L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Engine Control Module >> Service and Repair >> California Vehicles (Digifant I)
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California Vehicles (Digifant I)

Digifant Engine Compartment Components:





1. Switch the ignition "OFF".
2. Locate the Digifant I control unit, which is under the drip tray at the left rear of the engine compartment.
3. Release the harness connector retaining clip.
4. Remove the harness connector.
5. Remove the mounting bolts and lift out the control unit.
6. Reinstall in reverse manner, using care when connecting the harness connector.

NOTE: Because of its adaptive capability, the Digifant I control unit MUST be returned to its reference settings IF:

1. The coolant temperature sensor (blue connector) has been disconnected while the engine is running.

2. Any of these components have been replaced:
^ Digifant I control unit
^ Air flow sensor
^ Throttle valve potentiometer
^ Throttle body

Refer to RESETTING DIGIFANT I CONTROL UNIT.