Volvo Workshop Manuals
940 L4-2.3L SOHC VIN 88 B230F (1992)
Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Testing and Inspection > Without Engine Cooling Fan Ignition Advance System > Page 309
Radiator Cooling Fan Motor Relay: Testing and Inspection
When performing the following tests refer to SCHEMATIC DIAGRAMS/ELECTRICAL AND ELECTRONIC DIAGRAMS.
Install a suitable ignition timing light onto engine as per manufacturer's instructions.
Start and operate engine until normal operating temperature is reached.
With engine idling, connect two jumper wires at thermal switch to each other.
With the jumper wires connected, the electrical cooling fan should operate and the ignition setting should advance by 13° as indicated by the
If either the electric cooling fan does not operate or ignition timing is not advanced by 13°, replace relay assembly as required and repeat test
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