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Home >> Volkswagen >> 1991 >> Corrado L4-1781cc 1.8L SOHC SC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Testing and Inspection >> Federal, Canada >> Deceleration Fuel Shutoff
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Deceleration Fuel Shutoff

Deceleration fuel shut-off, checking

Requirements
- engine oil temperature 80°C (176°F) minimum
- idle switch OK




- disconnect main injector harness connector 1 from fuel rail wiring guide connector 2
- bridge connectors 1 and 2 using adaptor wires VW 1594/1, 2, 15 and 19
- connect US 1115 LED tester to adaptors as shown
- start engine and let idle
- LED tester must light up

- raise engine speed to approx. 3000 RPM and then release throttle abruptly
- LED must go out briefly (indicating deceleration fuel shut-off has been activated)
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