Deceleration Fuel Shutoff (CIS-E III)

Requirements:
- differential pressure regulator OK
^ engine oil temperature min. 80°C (176°F)





- connect multimeter US 1119 to differential pressure regulator using test adaptor VW 1315 A/1
- run engine at idle
- raise engine speed to over 3,000 RPM
- snap throttle shut
^ specification: 1 second after closing throttle, differential pressure regulator current must decrease to -50 to -60mA
At an engine speed of about 1,200 RPM differential pressure regulator current raises back to about 0mA (nominal)

If specification is NOT obtained
- adjust idle switch or repair break in wiring according to wiring diagram