THUMB GP 5006466 - Caterpillar

has failed. This failure is unlikely. Note: Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure and in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure. This procedure should not require entry into any enclosures that contain hazardous voltage components and should not require any hazardous voltage connections to be disconnected.When an area that contains hazardous voltage components must be entered for a service procedure, the "Safe Shutdown Procedure for Electric Drive Tractors" procedure must be performed before any enclosures that contain hazardous voltage components are opened or before any hazardous voltage connectors are disconnected. Refer to the Troubleshooting, "Electrical Maintenance Guidelines" section of this manual. Perform the "Safe Shutdown Procedure for Electric Drive Tractors" before any of the hazardous voltage areas are opened or before hazardous voltage connectors are disconnected.Note: The resistance of a good Brake Pressure Modulation Solenoid coil is 8.7 0.4 ohms at approximately 25 °C (77 °F). Resistance will increase as the temperatures increase. Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Test Step 1. CHECK THE SOLENOIDNote: When troubleshooting, ensure that the harness connectors are reconnected to the correct solenoid. Refer to the following media to locate the three different brake solenoids that are installed in the manifold of the brake control valve:
Systems Operation, KENR5609, "Steering and Brake Operation"
Specifications, KENR5609, "Brake Control Valve"
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the solenoid from the machine harness.
At the machine harness connector for the solenoid, connect a jumper wire between contact 1 (wire F792-WH) to contact 2 (wire H803-BU).
Turn the disconnect switch and the key start switch to the ON position. DO NOT START THE ENGINE.
Observe the status of the CID 2176 FMI 05 diagnostic code. Expected Result:The CID 2176 FMI 05 diagnostic code is no longer active. A CID 2176 FMI 06 diagnostic code becomes active when the jumper wire is connected. Results:
YES - The CID 2176 FMI 05 diagnostic code is no longer active. A CID 2176 FMI 06 diagnostic code becomes active when the jumper wire is connected. The solenoid has failed. Repair: The solenoid has failed. Repeat this Test Step "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid. Verify that the new solenoid corrects the problem. STOP
NO - The CID 2176 FMI 05 diagnostic code remains active. The jumper wire does not affect the status of the diagnostic code. The solenoid is not causing the problem. Proceed to Test Step 2. Test Step 2. CHECK THE CIRCUIT FOR AN OPEN
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector J1 from the Machine ECM.
The jumper wire that was installed in