GUIDE 8M6152 - Caterpillar

Use this procedure in order to troubleshoot an engine overspeed or use this procedure if the following event code is active. Refer to Troubleshooting, "Event Codes" for information about event codes. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".Note: Some of the following codes may not be applicable for certain applications.
Table 1
Diagnostic Trouble Codes    
CDL Code    J1939 Code    Code Description
(code descriptions may vary)    Comments    
E362 (1)     190-15     Engine Overspeed     The code is logged.    
E362 (3)     190-0     Engine Overspeed     The code requires factory passwords to be cleared.    Probable Causes
Proceeding down steep grades (if applicable)
Proper operation of the turbocharger
Intake air
Starting aids that are not operating properlyRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 2
Troubleshooting Test Steps    Values    Results    
1. Proceeding Down Steep Grades (If Applicable)
Engaging the engine brakes on a steep grade may be necessary.
A. The operator needs to understand the proper operation of the machine while using the engine brakes.
Not all applications have engine brakes.
   
Steep Grades
   
Result: Steep grades are the cause of the overspeed.
Repair: Control the engine speed during steep grades.
Result: Steep grades are not the cause of the overspeed.
Proceed to Test Step 2.
   
2. Proper Operation of the Turbocharger
A. Check for proper operation of the turbocharger.
B. Check for any oil that may be leaking into the air inlet.
   
Turbocharger
   
Result: The turbocharger is leaking oil into the inlet.
Repair: Repair or replace the turbocharger.
Result: The turbocharger is not leaking oil into the inlet.
Proceed to Test Step 3.
   
3. Intake Air
A. Check for combustible gases in the surrounding atmosphere.
B. Check for proper operation of starting aids (if equipped).
   
Air quality
   
Result: The atmosphere has combustible gases.
Repair: Do not operate the engine in an environment with combustible gases.
   Contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).