Engine Overspeeds
Use this procedure to troubleshoot an engine overspeed or use this procedure if one of the codes in Table 1 is active.
Show/hide table
| Diagnostic Trouble Codes | |
|---|---|
| CDL Code | Comments |
| E362 (3)
Engine Speed : High - most severe (3) |
The code requires factory passwords to be cleared. |
| E362 (1)
Engine Speed : High - least severe (1) |
The code is logged. |
- Proceeding down steep grades (if applicable)
- Proper operation of the turbocharger
- Intake air
- Starting aids that are not operating properly
Show/hide table
| Troubleshooting Test Steps | Values | Results |
|---|---|---|
1. Check for Steep Grade Acceleration (If Applicable) Note: 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. |
Steep Grades |
Result: Steep grades are not the cause of the overspeed. Proceed to Test Step 2. Result: Steep grades are the cause of the overspeed. Repair: Control the engine speed during steep grades. If the problem is not resolved, proceed to Test Step 2. |
2. Check for 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 OK. Proceed to Test Step 3. Result: The turbocharger is NOT OK. Repair: Repair or replace the turbocharger. If the problem is not resolved, proceed to Test Step 3. |
3. Inspect the Intake Air A. Check for combustible gases in the surrounding atmosphere. B. Check for proper operation of starting aids (if equipped). |
Intake air quality |
Result: The atmosphere has combustible gases. Repair: Do not operate the engine in an environment with combustible gases. |
If the problem is not resolved, contact your Technical Communicator (TC). For further assistance, the TC can confer with the Dealer Solutions Network (DSN).
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