846530 Volvo.Penta Screw

Table 1
Diagnostic Code    
Description    Conditions which Generate this Code    System Response    
267-2 Remote Shutdown Input : Erratic, Intermittent, or Incorrect     The two inputs for the ground level shutdown switch are in the same state.     The code is active and the code is logged.    The ground level shutdown switch is used to shut down the engine. The engine Electronic Control Module (ECM) remains powered. Caterpillar Electronic Technician (ET) can be used to communicate with the ECM. The ground level shutdown switch must be returned to the RUN position and the keyswitch must be cycled to the OFF position before the ECM will allow the engine to start.To shut down the engine, toggle the ground level shutdown switch to the SHUTDOWN position. The ECM reads the position of the ground level shutdown switch. If the engine is running, the ECM disables the fuel injection. If the engine is not running, the ECM will not allow the engine to start.
Illustration 1 g01446574
Schematic for the ground level shutdown switch
Illustration 2 g01446587
Location of the connectors at the ECM(typical left side engine view) (1) Right rail connector (2) J1/P1 ECM connector
Illustration 3 g01447008
P1 ECM connector (P1-18) Digital return (P1-23) Ground level shutdown (NO) (P1-40) Ground level shutdown (NC)
Illustration 4 g01446592
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)
Illustration 5 g01159881
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 wires from the ground level shutdown switch.
D. Create a short circuit at the connector for the ground level shutdown switch between terminal A (ground level shutdown (NC)) and the terminal B (digital return).
E. Turn the keyswitch to the ON position.
F. Observe the status of the "Shutdown Switch" on Cat ET.
G. Remove the short circuit at the connector for the switch.
H. Create a short circuit at the connector for the ground level shutdown switch between terminal C (ground level shutdown (NO)) and the terminal B (digital return).
I. Observe the status of the "Shutdown Switch" on Cat ET.
J. Turn the keyswitch to the OFF position.
K. Remove the wire short.
    Short Switch    
Results: The status of the switch is correct for both tests.
Repair: The problem is not with the harness or the ECM. Temporarily connect a new ground level shutdown switch.
Verify that the new ground level shutdown switch solves the problem before you permanently install the new ground level shutdown switch.
Results: The status of the switch is not correct for at least one of the tests. There is a problem in the harness and/or the ECM.
Proceed to Test Step 4.
   
           
4. Short the Ground Level Shutdown Switch at the ECM
A. Use a wire removal tool to remove the wires from terminal locations P1-18, P1-23, and P1-40 at the ECM connector.
B. Fabricate a jumper wire that is long enough to create a test circuit across the ECM connector. Crimp connector sockets to each end of the jumper wire.
C. Use the wire jumper to create a short circuit between terminal locations P1-18 and P1-40 at the ECM connector.
D. Turn the keyswitch to the ON position.
Note: The digital return will no longer be connected to the other sensors and switches. Additional diagnostic codes will be generated from the ECM. Clear the codes after you complete this test.
E. Observe