I followed the below "Work tool does not Function" troubleshooting procedure and here is where i am at:
Step 1 result: OK (No fault lights) on to step 2
Step 2 result: the resistance from contact 24 to contact 68 (wire P988-OR to wire 975-WH) of the wire harness connector is 9.8 Ohms.... (Supposed to be 6?) on to step 3?
Step 3 result: OK (10 ohms measured at Work tool pilot solenoid) on to step 4
Step 4 result: Not OK NO RESISTANCE measured at the work tool detent coil
Does this mean the work tool detent coil is bad and causing all these issues?
I also checked continuity from the ecm plug to the work tool pilot solenoid and detent solenoids to check for shorts/continuity and everything looks good.
Work Tool Does Not Function
System Operation Description:
The Interlock ECM will NOT engage the work tool pilot solenoid if problems exist with the parking brake switch or the work tool pilot solenoid.
Note: Use a jumper wire on machines that do NOT use a lockout switch for the work tool. The jumper wire is
165-0312 Wire Assembly. This jumper wire is fastened to the harness in place of the switch. The jumper must be connected in order to allow both the primary work tool and the auxiliary work tool to operate.
Test Step 1. CHECK THE FAULT INDICATORS
- Occupy the seat.
- Lower the armrest.
- Turn the key start switch to the ON position.
- Press and release the parking brake switch.
Expected Result:
The armrest indicator and the parking brake indicator should be off.
Results:
- OK - The armrest indicator and the parking brake indicator are off. Proceed to Test Step 2.
- NOT OK - The parking brake indicator remains on.
Repair: See Troubleshooting, "Switch (Parking Brake)".
Stop.
Test Step 2. CHECK THE CIRCUIT OF THE WORK TOOL PILOT SOLENOID
- 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.
- Remove the wire harness from the ECM.
- Measure the resistance from contact 24 to contact 68 (wire P988-OR to wire 975-WH) of the wire harness connector.
Expected Result:
The resistance should be approximately 6 Ohms.
Results:
- OK - The resistance is approximately 6 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 approximately 6 Ohms. Proceed to Test Step 3.
Test Step 3. CHECK THE RESISTANCE OF THE WORK TOOL PILOT SOLENOID
- Locate the work tool pilot solenoid.
- Disconnect the wire harness from the work tool pilot solenoid.
- Measure the resistance of the two wires on the work tool pilot solenoid.
Expected Result:
The resistance should be approximately 10.5 Ohms.
Results:
- OK - The resistance is approximately 10.5 Ohms. Proceed to Test Step 4.
- NOT OK - The resistance is not approximately 10.5 Ohms.
Repair: The solenoid has failed. Replace the coil.
Stop.
Test Step 4. CHECK THE RESISTANCE OF THE WORK TOOL DETENT COIL
- Locate the work tool detent coil. The detent coil is located beneath the right hand joystick. Remove the access panel in order to get to the connector.
- Disconnect the wire harness from the work tool detent coil .
- Measure the resistance of the two wires on the work tool detent coil.
Expected Result:
The resistance should be approximately 10.5 Ohms.
Results:
- OK - The resistance is approximately 10.5 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 approximately 10.5 Ohms.
Repair: The work tool detent coil has failed. Replace the the work tool detent coil.
Stop.