LI5421P062006
Service Bulletin Details
Public Details for: LI5421P062006
C63/gtx 177/178 check engine light on with misfire dtc's. Engine running roughly
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C63/GTx 177/178 Check Engine Light on with Misfire DTC's. Engine Running Roughly Topic number LI54.21-P-062006 Version 8 Function group 54.21 Control units / basic modules Date 12-03-2018 Validity Model 190.3## Model 190.4## Model 205.#8# Reason for change Added VC location picture Reason for block Complaint: Engine running rough / Fault code entry Possible fault codes: P030185 - Combustion misfiring of cylinder 1 was detected. P030285 - Combustion misfiring of cylinder 2 was detected. P030385 - Combustion misfiring of cylinder 3 was detected. P030485 - Combustion misfiring of cylinder 4 was detected. P030585 - Combustion misfiring of cylinder 5 was detected. P030685 - Combustion misfiring of cylinder 6 was detected. P030785 - Combustion misfiring of cylinder 7 was detected. P030885 - Combustion misfiring of cylinder 8 was detected. P030022 - Combustion misfiring was detected Cause: Misfire detection protocol in ME SW Attachments File Description IMG_3273.JPG Example image of ceramic damage on spark plug 20150609_105958.jpg Example image of electrode damage on spark plug Remedy: Check that the ME Control Software is up to date at version VC 5.1 or later (located in the ME CUL, see the attachments for location) 12-03-2018 4:23 PM © Copyright Daimler AG HENRAND Page 1/3 If ME Control Unit Software is NOT up to date: 1. 2. 3. 4. 5. If ME Control Unit Software is not up to date, update it along with the VGS, PTCU, and FSCU control units. Ensure that all ignition coils are pare number A 177 906 95 00 After updating, clear out the mixture adaptation data and perform 2 AMG Engine Adaptation Drives Create a PTSS case and upload the old (showing the fault codes) IQT, the new (after ME update) IQT, and the injector perofmance data AFTER performing the 2 AMG Engine Adaptation Drives. The data will be reviewed and you will be given instructions on whether to release the vehicle or perform further adaptations If ME Control Unit Software IS up to date: 1) Smoke test intake/exhaust and check for leaks. NOTE: The intakes to the turbochargers as well as the tubes from the turbochargers to the intercoolers must be tested. • • Repair as necessary. If no leaks are found, or repair does not remedy complaint proceed to step (2). 2) Inspect ignition coils and verify they are PN: A 177 906 95 00. • • Replace as necessary. If all coils are PN A 177 906 95 00 swap the coil(s) of the misfiring cylinder(s) with those of cylinder(s) that are not misfiring and road test the vehicle. • If the misfires move with the coils, replace the coils and the spark plugs on original misfiring cylinders • If the misfires do not move with coils, or if the misfires do not reappear proceed to step (3) 3) Perform a Xentry guided high pressure fuel test from cold start and obtain the injector performance data, and initial quick test with fault freeze • • If the test fails for either bank, replace the high pressure fuel pump for that bank. If the test passes for both banks, road test the car with ECO start/stop disabled and allow the vehicle to achieve operating temperature • Shut the vehicle down and observe the fuel pressures on the left and right banks at t=0, t=30 minutes, t=60 minutes, and t>120 minutes • If at any time the fuel pressure drops below the minimum value and/or a large differential exists between the left and right banks, boroscope the cylinders on the bank with low fuel pressure and determine if one or more of the injectors is leaking. • If the fuel pressure remains within acceptable limits proceed to step (4) • If one or more of the injectors is leaking, open a PTSS case and upload pictures of the leaking injector(s) taken with the boroscope as well as the information collected via Xentry thus far. • Replace the leaking injector(s) • Update the IMA coding for the new injectors in their respective cylinders via Xentry • Perform 2 AMG Engine Adaptation Drives • Upload the new injector performance data and quick test to the case 4) Open PTSS Case if Above do not Remedy the Complaint: Include in the case: 1. 2. 3. 4. 5. 6. All Data from step (3) MED1775 Control Unit Log Software update check for ME and Transmission control units Engine Performance Data Injector Performance Data Line Graph Version of the Fault counter from Cold Start 12-03-2018 4:23 PM © Copyright Daimler AG HENRAND Page 2/3 7. 8. PICO Compression Test of ALL Cylinders Boroscope of cylinder(s) with leaking injector(s) • Important: Before performing the boroscope examination, it is imperative that the engine be left to sit until cold Attachments File Description Fault Counter.pdf Line Graph Version of Fault Counter Instructions AMG Adaptation.docx AMG Engine Adaptation Drive vc.png VC Number Location Symptoms Power generation / Engine management / Engine running / Runs rough/shakes Power generation / Engine management / Indicator lamp / Engine diagnosis / lit Control unit/fault code Control unit Fault code N3/10 - Motor electronics 'MED1775' for combustion engine 'M177' (ME) Fault text - Operation numbers/damage codes Op. no. Operation text 12-03-2018 4:23 PM © Copyright Daimler AG Time HENRAND Damage code Note 54575 90 Use the appropriate damage code according to the cause Page 3/3