PLANETARY GP 7T9087 - Caterpillar

Table 2
Troubleshooting Test Steps Values Results
1. Inspect the Electrical Connectors and the Wiring
A. Remove the electrical power from the ECM.
B. Thoroughly inspect connectors (2), (3), and (4). Also, thoroughly inspect the other connectors for the prelubrication relay that are in the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the proper procedure for inspecting the connectors and the wiring.
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors and the other connections that are associated with the circuit.
D. Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
E. Check the harness and the wiring for abrasion and for pinch points. Connectors Results: The connectors and wiring appear to be OK.
Proceed to Test Step 2
Results: There is a problem in the connectors and/or wiring.
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 coupled.
Verify that the repair eliminates the problem.
2. Check for Active Diagnostic Codes
A. Connect Cat ET to the service tool connector.
B. Restore the electrical power to the ECM.
C. Monitor the active diagnostic code screen on Cat ET. Check the prelubrication system for an active diagnostic code.
Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
D. Select diagnostic tests from Cat ET.
E. Select the "Override Parameters" screen on Cat ET.
F. Activate the override for the prelubrication system.
G. Monitor the active diagnostic code screen on Cat ET. Check the prelubrication system for an active diagnostic code.
Note: Wait at least 30 seconds in order for the diagnostic code to become active.
H. Disable the override for the prelubrication system. Active codes Results: No diagnostic codes are active, but a problem is suspected in the prelubrication system.
Proceed to Test Step 6
Results: A -6 diagnostic code is active at this time. A short is detected in the circuit for the prelubrication relay.
Proceed to Test Step 3
Results: A -5 diagnostic code is active at this time. An open is detected in the circuit for the prelubrication relay.
Proceed to Test Step 4
3. Create an Open Circuit at the Control Circuit of the Prelubrication Relay
A. Remove the electrical power from the ECM.
B. Disconnect the control inputs from the blade terminals at the prelubrication relay.
C. Restore the electrical power to the ECM.
D. Monitor the active diagnostic code screen on Cat ET. Check the prelubrication system for an active diagnostic code.
Note. Wait at least 30 seconds in order for the diagnostic codes to become active.
E. Select diagnostic tests from Cat ET.
F. Select the "Override Parameters" screen on Cat ET.
G. Activate the override for the prelubrication system.
H. Monitor the active diagnostic code screen on Cat ET. Check for an active diagnostic code for the prelubrication system.
Note: Wait at least 30 seconds in order for the diagnostic code to become active.
I. Remove the electrical power from the ECM. Open Circuit Results: A -6 diagnostic code