PUMP GP-MAIN HYDRAULIC 1232233 - Caterpillar

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Typical schematic
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P1 ECM connector (P1-20) Manual ether switch
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P2 ECM connector (P2-10) Ether solenoid + (P2-20) Ether solenoid -
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Customer connector (Terminal 62) Manual ether switch
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Location of ECM connectorsTest Step 1. Inspect the Electrical Connectors and Wiring
Turn the main disconnect switch to the OFF position.
Thoroughly inspect the ECM connectors J1/P1 and J2/P2. Inspect all of the other connectors. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the customer connector (allen head screw) for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and the wiring for abrasion and for pinch points.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiringare free of corrosion, of abrasion and of pinch points.Results:
OK - The connectors and wiring are OK. Proceed to Test Step 2.
Not OK - The connectors and/or wiring are not OK.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOPTest Step 2. Check for Active Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the main disconnect switch to the ON position.
Monitor the active diagnostic code screen on Cat ET. Check the ether system for an active diagnostic code.Note: Wait at least 30 seconds in order for any diagnostic codes to become active.
Activate the override for the ether system. Monitor the active diagnostic code screen on Cat ET. Check the ether system for an active diagnostic code.Note: Wait at least 30 seconds in order for the diagnostic code to become active.
Deactivate the override for the ether system.Expected Result:No active codes or logged codes are present.Results:
OK - No active codes or logged codes are present. The ether injection system does not inject ether.Repair: Remove the ether canister(s) from the ether solenoid(s). Determine if the ether canister(s) contains any ether. If the ether canisters are empty, replace the empty ether canister with a full ether canister. Retry the system. If the ether canisters are not empty, proceed to Test Step 3.
Active Code - Active Diagnostics are displayed. Proceed to Test Step 3.
Logged Code - Logged Diagnostics are displayed. Check for an intermittent short or for an open in the wiring or in the connectorsRepair: Repair the connectors or wiring and/or replace the connectors or wiring.STOPTest Step 3. Check the Voltage at the Ether SolenoidsNote: This test step must be performed for each of the ether solenoids in the circuit.
Turn the main disconnect switch to the OFF position.
Disconnect the ether solenoid connectors at the solenoids.
Connect a voltmeter between pin 1 and pin 2 of the ether solenoid connector.
Turn the main disconnect switch to the ON position.
Select the "Diagnostic Tests" on Cat ET.
Select the "Override Parameters" screen on Cat ET.
Activate the ether