200 Quattro Wagon L5-2226cc 2.22L SOHC Turbo (MC) (1989)
Knock Sensor: Testing and Inspection
Engines With Two Knock Sensors
CIS Turbo ECU Harness Connector (Pin # Locations)
There is no static test for a knock sensor, however there are ways of determining whether or not a knock sensor is working.
KNOCK SENSOR #1 (CYLS. #1 & #2)