This is an instruction show you guide on how to do regeneration troubleshooting for Detroit Diesel GHG14 DDEC VI engine.
2023 Detroit Diesel Diagnostic Link DDDL 8.17 8.09 Free Download
Note : This diagnostic should be completed first for regeneration issues.
Verification: Verify Parked Regeneration Completes
1.Connect using DiagnosticLink ® and then turn the ignition ON (key ON, engine OFF).
2.Using DiagnosticLink, check for fault codes. Are any Fuel System or Air System fault codes present?
2a Yes; troubleshoot those codes first.
2b No; Go to step 3.
During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside.
Note : If the unit is in zone zero, the system will not initiate a parked regeneration without using DiagnosticLink.
3.Using DiagnosticLink, go to Service Routines/DPF System/Perform Parked Regeneration/Start. Does the regeneration start successfully by reaching at least 1,100 rpm?
3a Yes; let the regeneration continue to run and Go to step 4.
3b No; Regeneration – Unable to Start a Parked Regeneration
4.Does the regeneration end at any time without a fault code coming active?
4a Yes; Regeneration – Regeneration Ends Abruptly.
4b No; Go to step 5.
5.Using DiagnosticLink, monitor DOC inlet temperature. Does the DOC inlet temperature reach 280 °C (536 °F)?
5a Yes; Go to step 6.
5b No; Regeneration – DOC Inlet Temperature Unable to Reach HC Dosing Temperature .
6.Using the chart tab in DiagnosticLink, monitor DOC outlet temp and DOC Out Model Delay. After 30 minutes into the regeneration, is there a difference greater than +/- 55.5°C (100°F)?
6a Yes; Regeneration – DOC Outlet Temperature Unable to Meet Model Delay .
6b No; Go to step 7.
7.Using the chart tab in DiagnosticLink, monitor AS077: Fuel Cut Off Valve. At 30 minutes, does Fuel Cut Off Valve stay steady at 100%?
7a Yes; troubleshooting is complete.
7b No; stop the parked regen and start a DOC Face Cleaning service routine, found under Action – Aftertreatment. Let the routine run for one minute, then stop it. Start another parked regen and verify it completes successfully.
More repair cases for Detroit Diesel engines,please refer to:Detroit Diesel Engine Repair