Volvo Workshop Manuals
940 L4-2.3L SOHC VIN 88 B230F (1992)
Powertrain Management > Sensors and Switches - Powertrain Management > Sensors and Switches - Ignition System > Crankshaft Position/Engine Speed Sensor <--> [Crankshaft Position Sensor] > Component Information > Testing and Inspection > Ignition ECM > Page 4876
Removing Protective Sleeve
Remove connector protective sleeve and reinstall fuse #1 for testing.
^ Check connections through the holes in the connector.
Checking Pin 1
Check RPM sensor lead from ignition ECU by connecting a voltmeter from pin 1 on fuel injection ECU connector to ground.
Turn ignition ON.
Reading: approx. 12 volts
If reading is different, check wiring and connections. Fix as necessary. If wiring and connections are O.K., check ignition ECU (see ON-BOARD
Turn ignition OFF.
Disconnect the test equipment. Remove the #1 fuse and reconnect the ECU and all other connectors, install the kick panel and glove compartment.
Reinstall the #1 fuse.
The following testing procedure checks only the crankshaft position/speed signal from the ignition ECU, not the sensor itself. For crankshaft
NOTE: While trouble shooting, always check the wiring, fuses and connectors for good condition and routing. Use the wiring diagrams found in
SCHEMATIC DIAGRAMS to supplement your testing efforts.
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