1983577 ENGINE AR-COMPLETE Caterpillar parts
C-15
Rating:
Alternative (cross code) number:
CA1983577
198-3577
1983577
CA1983577
198-3577
1983577
TRUCK ENGINE,
Compatible equipment models: 1983577:
Information:
Illustration 1 g01190333
Schematic for the Parking Brake Pressure SwitchThis diagnostic code is associated with the parking brake pressure switch. The switch is connected to two inputs of the ECM. The inputs are "Normally Open" and "Normally Closed". One of the inputs is open and the other input is grounded during proper operation.The FMI 04 means that the ECM has determined that the "Normally Open" and "Normally Closed" circuits are grounded.Note: The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0627 FMI 04 is active before performing this procedure.Test Step 1. CHECK THE SWITCH
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the switch.
Turn the key start switch and the disconnect switch to the ON position.Expected Result:The CID 0627 FMI 04 has been replaced by CID 0627 FMI 03.Results:
OK - The CID 0627 FMI 04 has been replaced by CID 0627 FMI 03. The machine harness and the ECM are correct. Proceed to Test Step 3.
NOT OK - The CID 0627 FMI 04 is still active. Proceed to Test Step 2.Test Step 2. CHECK THE HARNESS
Turn the disconnect switch and the key start switch to the OFF position.
The machine harness remains disconnected from the switch.
Disconnect the machine harness connector(s) from the ECM.
Measure the resistance between contacts J2-53 (wire 419-YL) and J2-52 (wire G764-PK) of the machine harness to all the contacts that are used in the machine harness connectors for the ECM.Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
YES - Each resistance measurement is greater than 5000 ohms. Proceed to Test Step 3.
NO - One or more of the resistance measurements are less than 5 ohms. The harness has failed. The short is between J2-53 (wire 419-YL) and the circuit with the lowest resistance or the short is between J2-52 (wire G764-PK) and the circuit with the lowest resistance.Repair: Repair the wiring harness or replace the wiring harness. Stop.Test Step 3. CHECK THE
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