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 4874
Check that terminal contacts have been pushed down evenly in connector.
If any connectors have been pushed down to far, poor connection may result.
Checking Battery Supply
Check main power supply by connecting a voltmeter between pin 5 in ECM connector and ground.
Reading: approx. 12 volts
If no voltage registers, check wire between ECM and fuse-box located behind the center console ash tray. Check fuse #1, #3 and wiring to battery
Checking Crankshaft Position/Speed Sensor
Check crankshaft position/speed sensor by connecting an ohmmeter between ECM connector pin 10 and ECM connector pin 23. Reading should
Sensor 1389399-5 (older type) -- 240 ± 25 ohms @ 20° C
If value is incorrect, check wiring. If wiring is O.K., replace crankshaft position/speed sensor.
Checking Screen Connection
Check that screening is connected to pin 11. Fix if necessary.
After testing, disconnect all test equipment, reconnect all connectors (including the ECM connector) and remount all panels.
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