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Home >> Volvo >> 1990 >> 740 Base, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Turbo >> Ignition System Fault Code Testing >> Code 2-1-4 (Permanent/Magnet Generator Or Eng. Speed Sens. Signal)

Code 2-1-4 (Permanent/Magnet Generator Or Eng. Speed Sens. Signal)

Turn ignition off. Disconnect ECU connector and remove protective sleeve. Connect an ohmmeter between terminals No. 10 (Red or Blue wire) and No. 23 (Red or Blue wire). Resistance should be 215-265. If resistance is not within specification, check wiring. If wiring is okay, check sensor.