200 Quattro Wagon L5-2226cc 2.22L SOHC Turbo (MC) (1989)
Engine Speed Sensor: Testing and Inspection
CIS Turbo ECU Harness Connector (Pin # Locations)
STATIC TEST
Engine Sensor Electrical Connectors
1.
Unplug harness connector from crank position sensor lead (gray connector on bracket near ignition coil).
2.
Check resistance between terminals #1 and #2 of male connector.
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Resistance should be approx. 1K ohms. If not, replace sensor.
3.
Check resistance between terminals #1 and #3, and between terminals #2 and #3 of male connector.
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Resistance should be infinite (no continuity). If there is any continuity (even if resistance is very high) replace sensor.
4.
Check for open or grounded circuit between ECU terminals #29, #11, and #28, and sensor female harness connector terminals #1, #2, and #3
respectively, with ECU harness connector disconnected.
5.
Check clearance between sensor tip and teeth of flywheel.