32412-ZY1-801 Honda COVER, MAGNETIC SWITCH (Honda Code 7549785). TERMINAL

Table 1
J1939 Code and Description Comments
3554-18
Engine Ventilation Status : Low - moderate severity (2) The code is logged.
1664-31
Engine Automatic Start Failed The code is set if an unburned gas purge is commanded and engine speed is not detected.
Engine speed will not be detected for any of the following conditions:
- Engine speed does not become non zero within one second of the initial crank command.
- Starter system failure. The engine does not rotate during a crank command.
- The engine is rotating but neither the camshaft nor the crankshaft speed timing sensors provide a signal to the ECM.
The alarm output is activated.
The code is logged. Probable Causes
Excessive load
Incorrect base timing
Timing pattern not locked
Fuel supply problem
Ignition system problemIf the engine does not start, a problem with the primary fuel supply or ignition system may be present.Recommended Repairs
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (Cat ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: A code is active or logged.
Proceed to Test Step 2.
2. Check for Excessive Load
A. Ensure that the load is not excessive. If necessary, disengage the driven equipment and test the engine.
Excessive Load
Result: No excessive load on the engine.
Proceed to the next step.
Result: The engine has an excessive load.
Repair: Remedy the cause of the excessive load.
If the problem is not resolved, proceed to Test Step 3.
3. Check the Base Timing
A. Verify that the base timing is correct. Refer to Systems Operation/Testing and Adjusting, "Ignition Timing - Adjust"
Base Timing
Result: The Base Timing is correct.
Proceed to Test Step 4.
Result: The Base Timing is not correct.
Repair: Correct the Base Timing.
If the problem is not resolved, proceed to Test Step 4.
4. Verify Timing Pattern
A. Verify that the speed /timing pattern is locked. Verify by observing the primary and secondary engine speed sensor timing pattern status in CatET.
Parameters:
• "Primary Engine Speed Sensor Timing Pattern Status"
• "Secondary Engine Speed Sensor Timing Pattern Status"
Note: When checking status parameters, engine must be in a cranking state.
Note: Valid engine speed may be shown without a pattern being locked.
Speed/Timing
Result: Both the primary and the secondary speed sensor timing patterns are locked in Cat ET.
Proceed to Test Step 5.
Result: One or more timing patterns were not locked in Cat ET.
Repair: Verify the speed/timing circuit health. Refer to Troubleshooting , Speed/Timing-Test
If the problem is not resolved, proceed to Test Step 5.
5. Check the Fuel Supply
A. Make sure that fuel is supplied at a sufficient pressure that is stable. Make sure that the size of the fuel line is sufficient. Inspect the fuel system for leaks.
The following conditions can cause the engine to malfunction:
- Low fuel pressure
- High fuel pressure
- Poor fuel quality
B. Make sure that the fuel pressure is correct. When possible, interview the operator to determine if fuel quality is in question. Try to determine if the source of the fuel was changed.
Inspect the fuel system components:
- Fuel filter
- Gas pressure regulator
- Gas shutoff valve
- Fuel metering valve
Fuel
Result: The fuel supply is OK.
Proceed to Test Step 6.
Result: A faulty component was identified.
Repair: Repair or replace the faulty component.
If the problem is not resolved, proceed to Test Step 6.
6. Check the Ignition System
A. Ensure that current parts are used for the following components:
- Transformers
- Extenders
- Spark plugs
Inspect the ignition system for the following conditions:
1. Check the connection between the ignition transformer and the extender. A loose connection can cause arcing and misfires.
2. Check the connection between the extender and the spark plug for a loose connection or for pin holes that are caused by arcing. Both conditions can cause misfires.
3. Check the extender for corrosion on the spring. Corrosion may cause arcing through the extender.
4. Check for corrosion on the terminal of the spark plug and check for wear on the electrode. Both conditions can cause misfires.
Excessive moisture can cause misfire.
Maintain the spark plug according to the engine Operation and Maintenance Manual.
Ignition
Result: A faulty component was identified.
Repair: Repair or replace the faulty component.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).