Volvo Workshop Manuals
940 L4-2.3L SOHC VIN 88 B230F (1992)
Engine, Cooling and Exhaust > Cooling System > Sensors and Switches - Cooling System > Engine - Coolant Temperature Sensor/Switch > Radiator Cooling Fan Temperature Sensor / Switch > Component Information > Testing and Inspection > Without Engine Cooling Fan Ignition Advance System > Page 3975
Radiator Cooling Fan Temperature Sensor / Switch: Testing and Inspection
With timing light correctly installed and engine idling, connect a jumper wire between thermal switch connector terminals.
The engine cooling fan should start to operate and ignition timing advance 5-10° on B-280 or 13° on B-230 engines as indicated by the timing.
If not, replace thermal switch.
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