5030031 JOHNSON BOLT, Bracket

Table 1
Diagnostic Codes Table
CDL Code Code Description Comments
267-3 Remote Shutdown Input : Voltage Above Normal The code is logged.
267-4 Remote Shutdown Input : Voltage Below Normal
E678 (2) Ground Level Shutdown The inputs from the ground level shutdown switch to the ECM have changed states. The engine will shut down. The code is logged. The ground level shutdown switch allows the operator to shut down the engine from outside of the cab. When the switch is toggled to the STOP position, the engine shuts down. The Electronic Control Module (ECM) remains powered. Return the engine shutdown switch to the RUN position and cycle the electrical power to the ECM before attempting to restart the engine.The status of the engine shutdown switch can be observed using Caterpillar Electronic Technician (ET).
Illustration 1 g02133293
Schematic for the engine shutdown switch
Illustration 2 g02133296
Terminal locations at the P1 ECM connector
(P1-5) Digital sensor return
(P1-40) Engine shutdown switch (N/O)
(P1-41) Engine shutdown switch (N/C)
Illustration 3 g01159881
Harness connector for the engine shutdown switch
(Terminal A) Engine shutdown switch (N/O)
(Terminal B) Digital return
(Terminal C) Engine shutdown switch (N/C)
Table 2
Troubleshooting Test Steps Values Results
1. Inspect the Electrical Connectors and the Wiring
A. Remove electrical power from the engine ECM.
B. Thoroughly inspect ECM connectors (1). Also, thoroughly inspect the connectors for the machine interface connector and the engine shutdown switch. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. Perform a 45 N (10 lb) pull test on each of the wires for the engine shutdown switch.
D. Check the torque of the allen head screw on the ECM connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
E. Check the harness and the wiring for abrasion and for pinch points from the switch back to the ECM.
Connectors
Result: The harness and the connectors appear to be OK.
Proceed to Test Step 2.
Result: There is a problem with the connectors and/or wiring.
Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. Ensure that all of the seals are properly in place and ensure that the connectors are coupled.
STOP
2. Check the Status of the Shutdown Switch on CatET
A. Connect Cat ET to the service tool connector.
B. Turn the keyswitch to the ON position.
C. Monitor the status screen on Cat ET while you operate the shutdown switch. Observe the status for the shutdown switch.
Note: Wait at least 30 seconds for the status of the switch to change.
Shutdown Switch
Result: The status of the shutdown switch reads "ON" with the shutdown switch in the STOP position. The status of the shutdown switch reads "OFF" when the shutdown switch is in the RUN position. The shutdown switch is operating normally.
Repair: The circuit for the shutdown switch appears to be operating correctly. There may be an intermittent problem in the harness or in a connector. If an intermittent problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect".
STOP
Result: The status of the switch does not read "ON" with the shutdown switch in the STOP position. The status of the shutdown switch does not read "OFF" when the shutdown switch is in the RUN position.
There is a problem with the circuit for the shutdown switch. There may be a problem with the ECM. Proceed to Test Step 3.
3. Short the Terminals at the Harness Connector for the Shutdown Switch
A. Turn the keyswitch to the OFF position.
B. Fabricate a jumper wire that is long enough to short circuit two terminals at the harness connector for the shutdown switch. Crimp connector pins to each end of the jumper wire.
C. Disconnect the harness connector for the shutdown switch.
D. Check the status of the shutdown switch while the circuit is shorted to the RUN position.
a. Install the jumper wire between terminals B (digital return) and C (engine shutdown switch (N/C)) at the harness connector for the switch.
b. Turn the keyswitch to the ON position.
c. Observe the status of the shutdown switch using Cat ET.
Note: Wait at least 30 seconds for the status of the switch to change.
The correct status for the shutdown switch is "OFF".
d. Turn the keyswitch to the OFF position.
E. Check the status of the shutdown switch while the circuit is shorted to the STOP position.
a. Install the jumper wire between terminals A (engine shutdown switch (N/O)) and B (digital return) at the harness connector for the switch.
b. Turn the keyswitch to the ON position.
c. Observe the status of the shutdown switch using Cat ET.
Note: Wait at least 30 seconds for the status of the switch to change.
The correct status for the shutdown switch is "ON".
F. Turn the keyswitch to the OFF position.
G. Remove the jumper wire from the harness connector
Switch Status
Result: The switch status on Cat ET agrees with the test results.
Repair: There is a problem with the shutdown switch. Replace the shutdown switch.
STOP
Result: The switch status on Cat ET does not agree with the test results that are stated above.
The problem is in the harness between the ECM and the harness connector for the switch. There may be a problem with the ECM. Proceed to Test Step 4.
4. Short the Terminals for the Shutdown Switch at the ECM
A. Disconnect the J1/P1 ECM connectors.
B. Fabricate three jumper wires that are long enough to short circuit the terminals at the P1 ECM connector. Crimp connector sockets to one end of each of the jumper wires.
C. Remove the wires from terminal locations P1-5, P1-40, and P1-41 at the ECM connector. Install a jumper wire into each of these terminal locations.
D. Check the status of the shutdown switch while the circuit is shorted to the RUN position.
a. Short circuit the