810753 1 Mercury LOCK PLATE

Table 1
Diagnostic Codes
J1939 Code Code Description
(code descriptions may vary) Comments
2813-5 Engine Air Shutoff Command Status : Current Below Normal The code is logged.
2813-6 Engine Air Shutoff Command Status : Current Above Normal The code is logged.
3667-2 Engine Air Shutoff Status : Erratic, Intermittent, or Incorrect The inlet air shutoff valve switch has been used, but the inlet air shutoff valve feature is set as "Disabled" in the configuration parameters.
3667-31 Engine Air Shutoff Status The engine air shutoff valve has been activated. The engine was shut down and injection is disabled. Perform a key cycle and reset the air inlet shutoff system.
Follow the troubleshooting procedure in order to identify the root cause of the problem. Note: The "Air Shutoff" parameter must be set to "Enabled" in order for the ECM to energize the air shutoff solenoid.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Trouble Codes
A. Establish communication between Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM) . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Determine if a code is active or logged.
Diagnostic code
Result: A 3667-31 code is active or logged, or the air inlet shutoff valve is not working properly.
Proceed to Test Step 2.
Result: A 2813-5 code is active or logged.
Proceed to Test Step 11.
Result: A 2813-6 code is active or logged.
Proceed to Test Step 12.
Result: A 3667-2 code is active or logged.
Proceed to Test Step 13.
2. Perform the "Air Inlet Shutoff Override"
A. Turn the key switch to the OFF position.
B. Connect Cat ET to the service tool connector.
C. Turn the key switch to the ON position.
D. Place the transmission in neutral.
If the engine will not start, check the air inlet valve to ensure that the valve is not stuck closed.
E. Start the engine. Increase the engine speed to 1500 rpm 100 rpm.
F. Access the "Air Inlet Shutoff Override" in the "Diagnostic Tests" under the "Diagnostics" menu in Cat ET.
G. Start the test.
H. Wait for the engine to stop.
I. Stop the test.
Test was successful
Result: The engine is shut down when the "Air Inlet Shutoff Override" is activated. The air inlet shutoff is working correctly.
Reset the air inlet shutoff system. Proceed to Test Step 3.
Result: The engine did not shut down.
Proceed to Test Step 5.
3. Check the Air Inlet Shutoff Switch
A. Turn the key switch to the ON position.
B. Connect Cat ET to the service tool connector.
C. Use Cat ET to monitor the status for the air inlet shutoff switch while the switch is depressed.
Switch works correctly
Result: The status of the switch changed in Cat ET.
The inlet air shutoff switch is operating properly.
Return to service.
Result: The status of the switch did not change in Cat ET.
Proceed to Test Step 4.
4. Check the Circuit to the Air Inlet Shutoff Switch
A. Turn the key switch to the OFF position.
B. Remove the air inlet shutoff switch.
C. Turn the key switch to the ON position.
D. Connect Cat ET to the service tool connector.
E. Short the terminals of the air inlet shutoff switch together. This will simulate the switch being closed.
F. Use Cat ET to monitor the status for the air inlet shutoff switch while the short is in place.
The circuit is OK
Result: The status changed in Cat ET.
The wiring is OK. The switch is not working properly.
Replace the air inlet shutoff switch. Verify that the repair eliminates the problem.
Result: The status did not change in Cat ET.
There is a problem with the wiring between the ECM and the air inlet shutoff switch.
Inspect the wiring between the ECM and the air inlet shutoff switch. Repair the wiring or replace the wiring. Verify that the repair eliminates the problem.
5. Check the Transmission Neutral Switch
A. Verify that the transmission neutral switch is wired correctly.
If a transmission neutral switch is installed, the transmission must be in neutral.
B. Turn the key switch to