SOCKET GP-SPAN 1943878 - Caterpillar

Illustration 1 g02933917
Rear brake pilot supply solenoidThis diagnostic code indicates the brake ECM has determined that the traction control system (TCS) rear brake pilot supply solenoid voltage is above normal.This code can be caused by:
Shorted solenoid energize circuit
Failed ECMNote: The following test procedure may create other diagnostic codes. Ignore these codes, correct the original code, then clear these created codes. Note: Use a calibrated digital multimeter for this procedure.System Response:
This diagnostic code is logged into memory
TCS is disabledTest Step 1. CHECK FOR A SHORT TO THE +BATTERY CIRCUIT
Turn off the keyswitch and the disconnect switch.
Disconnect the harness from the solenoid.
Disconnect harness connectors J1 and J2 from the brake ECM.
At the J1 harness connector for the brake ECM, measure the resistance from contact J1-48 (wire 773-GY) to all J1 and J2 contacts that are connected to the +battery. Expected Result:Each resistance is greater than 5000 ohms. Results:
OK - Each resistance is greater than 5000 ohms. Proceed to Test Step 2.
NOT OK - A resistance is less than 5000 ohms There is a short between J1-48 (773-GY) and the circuit with low resistance.Repair: Repair or replace the harness.STOPTest Step 2. CHECK THE DIAGNOSTIC CODEThe switches remain off.The harness remains disconnected from the ECM.
Verify that the harness connector contacts are:
Clean
Dry
Corrosion free
Reconnect all harness connectors.
Turn on the disconnect switch and the keyswitch.
Operate the machine.
Check CID 0719 FMI 03.Expected Result:CID 0719 FMI 03 is not active.Results:
OK - CID 0719 FMI 03 is not active.Repair: CID 0719 FMI 03 was probably caused by a poor connection at one of the connectors that was disconnected and reconnected.Return the machine to service.STOP
NOT OK - CID 0719 FMI 03 is active. The brake ECM may have failed.Repair: Exit this procedure.Perform this procedure again. If the failure is not found, contact your technical communicator. If ECM replacement is required, see Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP