Vanagon F4-1915cc 1.9L (1984)
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Switch ignition ON
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Using multimeter US 1119, check voltage present across terminals of connector 2
Must be approximately 5 volts
If voltage reading NOT OK
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Check for open circuit in wiring according to current flow diagram
If wiring OK
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Replace control unit
Deceleration Fuel Shut-Off, Checking
Checking Deceleration Fuel Shut-Off
Test Conditions
Temperature sensor II minimum 60°C (140°F) with resistance reading less than 550 ohm
Work Sequence
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Using square end of tool VW 1490, bridge terminals of connector 2
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Accelerate engine slightly
Engine rpm must fluctuate (deceleration fuel shut-off system operates)
If rpm DOES NOT fluctuate
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Replace control unit