KIT, BREATHE 0779476 - Caterpillar

Illustration 1 g01032924
Occupy the seat.
Place the armrest in the DOWN position.
Turn the key start switch to the ON position.Expected Result:The parking brake indicator should be on.Results:
OK - The parking brake indicator is on. Proceed to Test Step 4.
NOT OK - The parking brake indicator is flashing. Proceed to Test Step 2.
NOT OK - The parking brake indicator is off.Repair: The parking brake indicator is not working properly. See Testing and Adjusting, "Parking Brake Indicator and Armrest Indicator Do Not Function Correctly". Stop.Test Step 2. CHECK THE CIRCUIT FOR THE PARKING BRAKE SWITCH FOR A SHORT TO GROUND
Turn the key start switch to the OFF position.
Raise the cab. See Operation and Maintenance Manual, "Cab Tilting".
Locate the interlock ECM. The interlock ECM is located on the left side of the machine beneath the access cover on the floor of the machine.
Disconnect the wire harness from the ECM.
Measure the resistance from contact 42 to contact 3 (wire F780-PK to wire 201-BK) on the wire harness connector.Expected Result:The resistance should be greater than 3000 Ohms.Results:
OK - The resistance is greater than 3000 Ohms.Repair: The ECM is very unlikely to have failed. Reconnect all connections and visually inspect the wire harness. Verify that the diagnostic code still exists. If the diagnostic code still exists perform the Test Steps again.Replace the ECM, if the cause of the diagnostic code was not found after the second attempt. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace". Stop.
NOT OK - The resistance is not greater than 3000 Ohms. Proceed to Test Step 3.Test Step 3. CHECK THE PARKING BRAKE SWITCH
Lower the cab.
Remove the parking brake switch.
Disconnect the wire harness from the switch.
Measure the resistance from terminal 2 to terminal 3 of the parking brake switch.Expected Result:The resistance should be greater than 5000 Ohms.Results:
OK - The resistance is greater than 5000 Ohms.Repair: The wire harness has failed. Repair the wire harness and/or the connector or replace the wire harness and/or the connector. Stop.
NOT OK - The resistance is not greater than 5000 Ohms.Repair: The parking brake switch has failed. Replace the parking brake switch. Stop.Test Step 4. CHECK FOR A FLASHING PARKING BRAKE INDICATOR AFTER THE SYSTEM IS ENABLEDNote: The seat will still need to be occupied and the armrest will need to be down. The key start switch will also need to be in the ON position.
Press and release the parking brake switch.Expected Result:The parking brake light should be off.Results:
OK - The parking brake light is off.Repair: There is no problem at this time. Stop.
NOT OK - The parking brake is flashing. Proceed to Test Step 5.Test Step 5. CHECK THE CIRCUIT OF THE HYDROSTATIC PILOT VALVE
Turn the key start switch to the OFF position.
Raise the cab. See Operation and Maintenance Manual, "Cab Tilting".
Locate the interlock ECM. The interlock ECM is located on the left side of the machine beneath the access cover on the floor of the machine.
Disconnect the wire harness from the ECM.
Measure the resistance between contact 29 and contact 68 (wire H416-GN and