volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Early Version With Two Throttle Switches|Page 2701 > < Early Version With Two Throttle Switches|Page 2699
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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

Early Version With Two Throttle Switches|Page 2701 > < Early Version With Two Throttle Switches|Page 2699