GUARD AS-FAN 3391487 - Caterpillar

Operation Description:Use this procedure if an engine shutdown occurs and the auxiliary fault indicator is flashing. Test Step 1. Inspect Electrical Connectors and Wiring
Turn the main disconnect switch to the OFF position.
Thoroughly inspect all of the connectors that are associated with the circuit.Expected Result:All connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check the Status Control Module (SCM)
Turn the main disconnect switch to the ON position.
Turn the emergency stop switch counterclockwise in order to reset the switch.
Turn the Engine Control Switch (ECS) to the OFF/RESET position.Expected Result:The fault indicator resets.Results:
OK - The fault indicator resets.Repair: There was an auxiliary fault. There is not a problem with the SCM.Troubleshoot the auxiliary fault.STOP
OK - The fault indicator does not reset.Repair: Disconnect the wire from terminal 13 on the SCM.If the fault indicator resets, troubleshoot the circuit for the auxiliary shutdown. Repair the connectors or wiring and/or replace the connectors or wiring. If necessary, replace the auxiliary shutdown relay.If the fault indicator still refuses to reset, proceed to Troubleshooting, "Fault Indicator Does Not Reset".STOP