Conditions Which Generate This Code:
The Electronic Control Module (ECM) detects the following condition:
- Exhaust inlet temperature is greater than the default temperature of 750 °C (1382 °F) for five seconds.
- The engine has been running for three seconds.
- The diagnostic codes CID-FMI 827-08 and CID-FMI 828-08 are not active.
System Response:
The ECM will log the event. The ECM derates the engine at 15 second intervals in 2 percent increments when the exhaust inlet temperature is above 750 °C (1382 °F) for five seconds up to a maximum derate of 25 percent. The Fuel limiting function will continue until the exhaust temperature returns below 740 °C (1364 °F). After the temperature returns below 740 °C (1364 °F) the derate due to a high exhaust temperature will be deactivated.
- Low power
- There may be an exhaust restriction.
- There may be an air leak.
Test Step 1. Check for "ACTIVE" Diagnostic Codes
- Start the AVSpare Electronic Technician (ET).
- Turn the keyswitch to the ON position.
- Check for any active diagnostic codes or logged diagnostic codes.
Expected Result:
There are no diagnostic codes that are present.
Results:
- OK - There are no diagnostic codes that are present. Proceed to Test Step 2.
- Not OK - There are diagnostic codes that are present.
Repair: Repair the diagnostic codes that are present. Refer to the appropriate topic in the "Troubleshooting With a Diagnostic Code" section of this manual. Ensure that the repair eliminates the problem.
STOP
Test Step 2. Perform a Check of the Exhaust System
- Perform a check of the exhaust system. Refer to the diagnostic procedure Troubleshooting, "Exhaust Temperature is Too High" for possible causes.
Expected Result:
There are no problems with the exhaust system.
Results:
- OK - There may be an intermittent problem.
Repair: Monitor the operation of the engine. Repair the problem. Ensure that the repair eliminates the problem.
STOP
- Not OK - There is a problem with the exhaust system.
Repair: Repair the problem. Ensure that the repair eliminates the problem.
STOP