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Table 1
Diagnostic Trouble Codes for the Ground Level Shutdown Switch
J1939 Code CDL Code Code Description Comments
- 267-3 Remote Shutdown Input : Voltage Above Normal The Electronic Control Module (ECM) detects the following condition:
Both contacts from the ground level shutdown switch are in the open state.
- 267-4 Remote Shutdown Input : Voltage Below Normal The Electronic Control Module (ECM) detects the following conditions:
Both contacts from the ground level shutdown switch are in the closed state. The ground level shutdown switch allows the engine to be shut down from ground level. When the switch is moved to the STOP position, the engine shuts down. The ECM remains powered. The ground level shutdown switch must be in the RUN position and the power to the ECM must be cycled before the engine can restart.Refer to the Electrical Schematic for the application during this procedure.
Table 2
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Thoroughly inspect the terminal connections on the P1 ECM connector and the switch connector.
Refer to Troubleshooting, "Electrical Connectors - Inspect".
B. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector and the ground level shutdown switch connector.
C. Check the screw for the ECM connector for the correct torque of 5 N m (44 lb in).
D. Check the harness for corrosion, abrasion, and pinch points from the solenoids to the ECM.
Loose connection or damaged wire
Result: There is a fault in a connector or the wiring.
Repair any faulty connectors or replace the wiring harness. Ensure that all the seals are properly in place and ensure that the connectors are correctly coupled.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly coupled and/or inserted. The harness is free of corrosion, abrasion, and pinch points.
Proceed to Test Step 2.
2. Check for Active Diagnostic Codes
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the diagnostic connector.
C. Place the ground level shutdown switch in the RUN position.
D. Turn the keyswitch to the ON position. Wait at least 20 seconds for activation of the diagnostic codes.
E. Verify if any of the diagnostic codes that are listed in Table 1 are active.
F. Turn the keyswitch to the OFF position.
Diagnostic codes
Result: No diagnostic codes are active or logged.
Repair: The switch is operating normally. There may be an intermittent fault in the wiring harness or in a connector. Check the wiring harness and the connectors for an intermittent electrical fault. Refer to Troubleshooting, "Electrical Connector - Inspect".
Result: A 267-3 diagnostic is active.
Proceed to Test Step 3.
Result: A 267-4 diagnostic is active.
Proceed to Test Step 5.
3. Create a Short Circuit at the Shutdown Switch Connector
A. Turn the keyswitch to the OFF position.
B. Fabricate a jumper wire. Install the jumper wire between terminal 1 and terminal 2 on the harness connector for the shutdown switch.
C. Turn the keyswitch to the ON position.
D. Use the electronic service tool to check for an active 267-3 diagnostic code.
E. Turn the keyswitch to the OFF position. Remove the jumper wire.
Diagnostic code
Result: The 267-3 diagnostic code is no longer active with the jumper installed.
Repair: Install a replacement ground level shutdown switch.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: The 267-3 diagnostic code is still active with the jumper installed.
Proceed to Test Step 4.
4. Check the (N/C) Wiring for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the harness connector for the ground level shutdown switch. Disconnect the P1 connector from the ECM.
C. Use a multimeter to measure the resistance between terminal 1 on the shutdown switch harness connector and the appropriate terminal on the P1 connector.
Less than 2 Ohms
Result: The measured resistance is greater than 2 Ohms.
The fault is in the wiring between the ground level shutdown switch and the P1 ECM connector.
Repair: Repair the faulty wiring or replace the faulty wiring.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: The measured resistance is less than 2 Ohms.
Contact the Dealer Solutions Network (DSN).
5. Create an Open Circuit at the Shutdown Switch Harness Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the harness connector for the ground level shutdown switch.
C. Turn the keyswitch to the ON position.
D. Use the electronic service tool to check for an active 267-3 diagnostic code.
Diagnostic code
Result: A 267-3 diagnostic code is active with the switch disconnected.
Repair: Install a replacement ground level shutdown switch.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: There are no active 267 diagnostic codes with the switch disconnected.
Proceed to Test Step 6.
6. Check the (N/O) Wiring for a Short Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the harness connector for the ground level shutdown switch. Disconnect the P1 connector from the ECM.
C. Use a multimeter to check the resistance between the N/O terminal on the P1 connector and all other terminals on the P1 connector.
Greater than 1 k Ohm
Result: At least one of the resistance measurements is less than 1 k Ohm.
There is a short in the wiring between the ground level shutdown switch and the P1 connector.
Repair: Repair the faulty wiring or replace the faulty wiring.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: All resistance measurements are greater than 1 k Ohm.
Contact the Dealer Solutions Network (DSN).