PANEL AS-CONTROL 3459647 - Caterpillar

Illustration 1 g01227202
Parking brake solenoid connectionsThis diagnostic code is recorded when the current of the parking brake solenoid circuit is above normal. The parking brake solenoid will fail to engage the brakes.Note: Ensure that CID 0681 FMI 06 is on hold and that the diagnostic code indicator shows "SERV CODE". This procedure can cause new diagnostic codes to be recorded. Ignore these created problems. When the procedure is completed, clear the created problems. Note: The following procedures should be performed while the engine is OFF in order to ensure that the machine will not move with the parking brake switch in the OFF position. Test Step 1. CHECK THE SOLENOID
Place the parking brake switch in the OFF position.
Turn the key start switch to the ON position. Ensure that CID 0681 FMI 06 diagnostic code is active.
Observe the status of the CID 0681 FMI 06 diagnostic code.
Disconnect the machine harness from the parking brake solenoid.Expected Result:The active FMI 06 diagnostic code changes to an active FMI 05 diagnostic code when the solenoid is disconnected from the machine harness.Results:
YES - The active FMI 06 diagnostic code changes to a FMI 05 diagnostic code when the solenoid is disconnected. The circuit is correct.Repair: The circuit is correct. The solenoid has failed. Repeat this step in order to verify that the solenoid has failed. Replace the solenoid.STOP
NO - The FMI 06 diagnostic code remains active. Disconnecting the solenoid did not affect the status of the active diagnostic code. Proceed to Test Step 2.Test Step 2. CHECK THE SIGNAL CIRCUIT FOR A SHORT TO GROUND
Turn the key start switch to the OFF position.
The machine harness remains disconnected from the parking brake solenoid.
Disconnect the machine harness connectors J1 and J2 from the ECM.
At machine harness connector J1, measure the resistance from contact J2-3 (wire G730-PK) to frame ground. Measure the resistance from contact J2-3 (wire G730-PK) to all of the other J1 and J2 contacts that are used in the machine harness connectors for the ECM.Expected Result:Each resistance should be greater than 5000 ohms.Results:
OK - Each resistance is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - Each resistance is not greater than 5000 ohms.Repair: There is a short in the machine harness. The short is between J2-3 (wire G730-PK) and the circuit that has a low resistance measurement.Refer to the complete machine Electrical System Schematic. Examine all of the connectors in the circuit for points in the machine harness where the circuit could be shorted. For information on testing for short circuits and finding short circuits, refer to Testing and Adjusting, "Wiring Harness (Short Circuit) - Test". Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE STATUS OF THE DIAGNOSTIC CODE
Remove connectors J1 and J2 from the ECM. Inspect the contacts and clean the contacts of the harness connectors.
Reconnect all harness connectors.
Turn the key start switch to the ON position.
Enter service mode of the Caterpillar Monitoring System and clear all inactive