TURBO GP 3054920 - Caterpillar

and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The harness and wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check the Status of the Ether Switch
Remove the ether canister from the ether solenoid.
Connect the Cat ET to the service tool connector.
Turn the keyswitch to the ON position.
Press the starting aid switch to "MANUAL". Observe the status of "Ether Switch" on Cat ET. Expected Result:When the starting aid switch is pressed, Cat ET displays the status of the switch as "On".When the starting aid switch is not pressed, Cat ET displays the status of the switch as "Off".Results:
OK - The starting aid switch is operating correctly. Proceed to Test Step 5.
Not OK - There may be a problem with the switch circuit. Proceed to Test Step 3.Test Step 3. Short the Switch Wires
Turn the keyswitch to the ON position.
Disconnect the starting aid switch.
Observe the status of "Ether Switch" on Cat ET. Note: The status should be "Off".
Install a jumper wire between terminal 2 and terminal 3 in the plug for the starting aid switch.
Observe the status of "Ether Switch" on Cat ET. Note: The status should be "On".Expected Result:When the terminals are shorted, Cat ET displays the status of the starting aid switch as "On".When the terminals are not shorted, Cat ET displays the status of the starting aid switch as "Off".Results:
OK - The ECM and the harness are OK, but the starting aid switch is not operating correctly.Repair: Replace the starting aid switch.Verify that the repair eliminates the problem.STOP
Not OK - There may be a problem with the harness. Proceed to Test Step 4.Test Step 4. Short the Switch Inputs at the ECM
Turn the keyswitch to the OFF/RESET position.
Remove the wires from P1:22 (Starting Aid Switch) and P1:5 (Digital Return).
Turn the keyswitch to the ON position.
Observe the status of "Ether Switch" on Cat ET. Note: The status should be "Off".
Install a jumper wire with Deutsch sockets on each end between P1:22 (Starting Aid Switch) and P1:5 (Digital Return).
Turn the keyswitch to the ON position.
Observe the status of "Ether Switch" on Cat ET. Note: The status should be "On".
Remove the jumper wire and reinstall the wires in the P1 connector. Expected Result:When the jumper wire is installed, Cat ET displays the status of the switch as "On".When the jumper wire is not installed, Cat ET displays the status of the starting aid switch as "Off".Results:
OK - The ECM is operating correctly. There is a problem in the wiring between the switch and the ECM.Repair: Repair the circuit.Verify that the repair eliminates the problem.STOP
Not OK - There is a problem with the solenoid circuit or the ECM.Repair: Verify your results. Replace the ECM. Refer to Troubleshooting, "Replacing