WIRING GP 4645887 - Caterpillar

Which Generate This Code:The movement of the mast position has exceeded the allowable amount. This diagnostic code occurred without moving the mast.Test Step 1. CYCLE THE POWER TO THE SYSTEM
Turn the key start switch for the machine to the "OFF" position.
Turn the key start switch for the machine to the "ON" position.Expected Result:The diagnostic code becomes inactive.Results:
YES - The diagnostic code becomes inactive. Return the machine to service.STOP
NO - The diagnostic code is still active. Proceed to Test Step 2.Test Step 2. PERFORM A BENCH OF THE SYSTEM
Manually position the blade on the desired benchmark.
Press the "bench" key in order to establish a known good benchmark.Expected Result:Diagnostic Code "EM 21" is no longer active.Results:
YES - Diagnostic Code "EM 21" is no longer active. Return the machine to service.STOP
NO - Diagnostic Code "EM 21" is still active.Repair: Replace the Circuit Board of the Electronic Mast. Refer to Special Instruction, REHS2402, "AccuGrade Electric Mast Repair Instructions" for additional information.STOP