FINAL DRIVE & BRAKE GP 2298521 - Caterpillar

Illustration 1 g01626181
Schematic of the Parking Brake solenoid
This diagnostic code is recorded when the ECM reads the voltage of the solenoid circuit as being above normal or shorted to the +battery.When this diagnostic code occurs, a warning (Category 3) is shown on the monitor. The diagnostic code will cause the transmission to shift to NEUTRAL. Limited operation at a reduced speed may be permitted ONLY after returning the speed/direction lever to the PARK position.The possible causes of this diagnostic code are listed below:
The circuit that energizes the solenoid is shorted to the +battery.
The ECM has failed. This is unlikely. Note: Ensure that the CID 0681 FMI 03 diagnostic code is on hold. The nominal coil resistance at room temperature is 34.3 ohms.Test Step 1. CHECK THE SOLENOID CIRCUIT FOR A SHORT TO +BATTERY.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the solenoid.
Disconnect machine harness connectors from the ECM.
At the machine harness connector, measure the resistance from signal contact J2-3 (wire G730-PK(Pink)) to all possible sources of the +battery. Expected Result:Each resistance measurement should be greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to test step 2.
NOT OK - One or more resistance measurements is not correct. There is a short in the machine harness. The short is between signal contact J2-3 (wire G730-PK(Pink)) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts of the harness connectors and clean the contacts.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Clear all of the inactive diagnostic codes.
Operate the machine. Expected Result:The diagnostic code for the solenoid is not present.Results:
YES - The diagnostic code is NOT present. The diagnostic code does not exist at this time. The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.STOP
NO - The diagnostic code has not been corrected. It is unlikely that the ECM has failed.Repair: Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. See Troubleshooting, "Electronic Control Module (ECM) - Replace".STOP