PLATE 3827518 - Caterpillar

Illustration 1 g01124534
Right Main Blower MotorThis diagnostic code is recorded when the ECM reads the current of the right main blower motor as above normal (short to ground).The possible causes of this diagnostic code are:
The energize circuit for the blower is shorted to ground.
The blower motor is malfunctioning.
The ECM has failed. This is unlikely.System Response:The results of this diagnostic code are:
The burner diagnostic lamp that is located below the screed walkway will be ON.
The ECM will not initiate a burner ignition cycle for the right main burner when this diagnostic code is active.Note: Ensure that the diagnostic code CID 941 FMI F06 for the right main blower motor is on hold and that the red diagnostic code present indicator on the conveyor ECM display is ON.Test Step 1. Check Blower Motor
Turn the key start switch to the ON position.
Observe the status of the red conveyor ECM diagnostic code present indicator (ON or OFF).
Disconnect the blower motor from the machine harness.Expected Result:The conveyor ECM diagnostic code present indicator should turn OFF when the blower motor is removed from the machine harness.Results:
OK - The conveyor ECM diagnostic code present indicator does turn OFF when the blower motor is removed from the machine harness.Repair: The circuit is correct. The blower motor is malfunctioning. Replace the blower motor. Stop.
NOT OK - The conveyor ECM diagnostic code present indicator does not turn OFF when the blower motor is removed from the machine harness. Proceed to Test Step 2.Test Step 2. Check Blower Motor Energize Circuit For Short To GroundThe blower motor remains disconnected from the machine harness.
Turn the key start switch to the OFF position.
Disconnect the machine harness connectors J1 and J2 from the ECM.
At the ECM machine harness connector, measure the resistance from the energize signal circuit at connector contact J2-8 (wire P815-PU) to all possible sources of ground. The possible ground sources are connector contacts J1-2, J1-5, J1-7, J1-15, J1-16 and J2-3.Expected Result:Each resistance should measure greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. Proceed to Test Step 3.
NOT OK - One or more of the resistance measurements is less than 5000 ohms.Repair: There is a short in the machine harness for the right main blower motor circuit. The short is between the energize signal circuit (wire P815-PU) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness. Stop.Test Step 3. Check To See If Diagnostic Code Remains
Clean the contacts of the harness connectors.
Reconnect all harness connectors.
Turn the key start switch to the ON position.
Enter burner service mode 3 on the conveyor ECM three digit display. Clear all inactive diagnostic codes.
Operate the machine.
Check to see if the CID 941 FMI F06 diagnostic code for the blower motor is active (red diagnostic code present indicator ON).Expected Result:The CID 941 FMI F06 diagnostic code for the blower motor is not active.Results:
OK - The CID 941 FMI F06 diagnostic code for the blower motor is not active. The machine harness and the ECM