volkswagen Workshop Repair Guides

Volkswagen Workshop Manuals

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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

Full Throttle Enrichment, Checking

Checking Full Throttle Enrichment

Test Conditions

Temperature sensor II minimum 60°C (140°F)
CO tester and VW 1367 connected

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Start engine and let idle approximately two minutes

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Slowly accelerate engine until 4000 rpm is reached
CO must read 0.3 - 1.1% Vol.

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Using squared end of tool VW 1490, bridge terminals of connector 2
CO reading must increase above 1.5% Vol.

If CO readings NOT OK
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Replace control unit

Powertrain Management > Fuel Delivery and Air Induction > Throttle Full Open Switch > Component Information > Testing and Inspection > Early Version With Two Throttle Switches > Page 2710

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