HARNESS AS-POWER 3901194 - Caterpillar

Illustration 2 g01446587
Location of the connectors at the ECM that are for the 16 cylinder engines (typical left front engine view) (1) Right rail connector (2) J1/P1 ECM connector
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Location of the connectors at the ECM that are for the 20 cylinder engines (typical front side engine view) (1) Right rail connector (2) J1/P1 ECM connector
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P1 ECM connector (P1-18) Digital return (P1-23) Ground level shutdown (NO) (P1-40) Ground level shutdown (NC)
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Terminal locations at the right rail connector for the ground level shutdown (Terminal 6) Digital return (Terminal 19) Ground level shutdown (NO) (Terminal 20) Ground level shutdown (NC)
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Terminal locations at the harness connector for the ground level shutdown (Terminal A) Ground level shutdown (NC) (Terminal B) Digital return (Terminal C) Ground level shutdown (NO)
Table 2
Troubleshooting Test Steps    Values    Results    
1. Inspect the Electrical Connectors and the Wiring
A. Turn the keyswitch to the OFF position.
B. Thoroughly inspect connectors (1) and (2) . Thoroughly inspect the connectors for the ground level shutdown switch. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector 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.
    Inspect Connectors and Wiring.    
Results: The harness and wiring are OK.
Proceed to Test Step 2.
Results: 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 coupled.
Verify that the repair eliminates the problem.
   
2. Check the Status of the Ground Level Shutdown Switch on Cat ET
A. Connect Cat ET to the service tool connector. Start Cat ET.
B. Turn the keyswitch to the ON position.
C. Operate the ground level shutdown switch. Observe the status for the "Shutdown Switch" on Cat ET.
    Status of Switch    
Results: The status of the "Shutdown Switch" reads "ON" with the ground level shutdown switch in the SHUTDOWN position. The status of the "Shutdown Switch" reads "OFF" when the ground level shutdown switch is in the RUN position. The ground level shutdown switch is operating normally.
Repair: There may be an intermittent problem. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".
Results: The status of the "Shutdown Switch" does not read "ON" with the ground level shutdown switch in the SHUTDOWN position. The status of the "Shutdown Switch" does not read "OFF" when the ground level shutdown switch is in the RUN position. The ground level shutdown switch is not operating normally.
Proceed to Test Step 3.
   
3. Short the Wires together at the Ground Level Shutdown Switch
A. Turn the keyswitch to the OFF position.
B. Record the position of the wiring on the ground level shutdown switch before removing the wires.
C. Disconnect the