GLC63 with M177LS1 - Engine Light Illuminated - P030022 Misfire
Topic number

LI07.61-P-069688

Version

3

Function group

07.61 ME fuel injection/ ignition system

Date

05-31-2019

Validity

253 GLC63 Equipped with M177LS1

Reason for change

Added instructions for injector procurement

Reason for block

Complaint:

Customer complains that CEL is illuminated. May also complain of rough running.

Cause:

Under inverstigation.

Attachments
File

Description

BR253_ground_points.pdf

Ground Point Locations

M177LS2 Intake Manifold Leak Area.jpg

Intake manifold leak area

Remedy:

1.) Smoke test intake/exhaust and check for leaks.
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Working each bank one at a time; remove the upstream O2 sensor and install the smoke tip.
Seal around the tip to ensure there are no leaks.
Seal the exhaust tip outlet to the O2 sensor bung.
Turn the smoke machine on at the maximum possible pressure.
Look for leaks in the exhaust.
Using very soapy water (it should create suds by itself by spraying) saturate all connections.
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Look for signs of bubbles.
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Move and stress the components.
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Perform the check with engine cold and after a 5 minute run time (lukewarm).
Working each bank one at a time, install the smoke machine tip into the intake air temperature sensor port.
Remove the oil fill cap.
Turn the pressure up on the smoke machine to maximum and fill the engine with smoke until it begins to come
out of the oil fill port.
Reinstall the oil fill cap.
Look for leaks.
Using very soapy water (it should create suds by itself by spraying) saturate all connections.
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Look for signs of bubbles.
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Perform the check with engine cold and after a 5 minute run time (lukewarm)
If leaks are found, open a PTSS case and perform the following:
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Repair the leaks as necessary.
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Clear the mixture adaptations, clear the fault codes, and perform 2 AMG Engine Adaptation Drives (this
can be found in the AMG User's Guide)
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Pull the new injector performance data. Label this "IPDA"

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Compare the new injector performance data to the initial injection performance data pulled when the car
first arrived.
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The ORA and FRA values should have changed.
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If the ORA/FRA values have not changed; stop and ask for assistance in the PTSS case.
Then perform another 2 AMG Engine Adaptation Drives and pull the injector performance data again. Label this "IPDB"
Upload all three injector performance data printouts to the PTSS case.
If no leaks are found proceed to step (2)

2.) Check driver's side intake manifold for cracks near the rear (see attachments) of the engine.
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If damage is found, order a new manifold for the driver's side bank from EPC and OPEN PTSS case with pictures of damage.
Include the following:
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Production stamp on the damaged manifold (looks like a pair of clocks)
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Production sticker
If no damage is found, or repair does not remedy complaint proceed to step (3).

3.) Measure the following grounds. If any reading is above 0.5 ohm, check grounding locations (per attachments).
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ME Connector F, Pin 1 to ground
ME Connector F, Pin 2 to ground
ME Connecter F, Pin 4 to ground
ME Connector M, Pin 6 to ground
ALL Coils, Pin 1 to ground
Rework grounding locations by removing and cleaning the chassis ground point(s) of any paint or debris.
If rework/replacement does not remedy complaint, proceed to step (4).

4.) Contact your parts department. Have them open a PAC case and order 8 injectors.
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In the notes field of the PAC case specificy that you need (8) injectors that follow these rules:
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(4) Injectors whose IMA codes read as 33xx
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(2) Injectors whose IMA codes read as 34xx
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(2) Injectors whose IMA codes read as 35xx
Install the injectors as follows:
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Cylinder 1: [35xx]
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Cylinder 2: [33xx]
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Cylinder 3: [34xx]
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Cylinder 4: [33xx]
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Cylinder 5: [33xx]
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Cylinder 6: [35xx]
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Cylinder 7: [33xx]
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Cylinder 8: [34xx]
Replace all injector seals
Perform new injector coding
Observe AR07.03-P-1010-04MM
Clear all fault codes
Check for updates to the ME/VGS/PTCU/FSCU and update as available
Reset the self mixture adaptation data
Read out the injector performance data, label this IPDA
Perfrom 2 AMG engine adaptation drives (this can be found in the AMG User's Guide), then read out and upload
the injector performance data. Label this IPDB
Perform a line graph version of the fault counter per the attachment: "Hot-Cold Misfire Detection"

4.) Open PTSS Case if Above do not Remedy the Complaint INCLUDE IN THE CASE:
1.
2.

All Data from step (3)
MED1775 Control Unit Log

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3.
4.
5.

Software update check for ME and Transmission control units
Engine Performance Data
PICO Compression Test or Manual Compression Test

Attachments
File

Description

Hot-Cold Misfire Detection.pdf

Hot-Cold Misfire Detection

Fault Counter.pdf

Fault Counter Instructions

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

Fault text

N3/10 - Motor electronics
P030027
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring has been detected. The signal change rate
is above the permissible limit value.

N3/10 - Motor electronics
P030485
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring of cylinder 4 has been detected. There is a
signal above the permissible limit value.

N3/10 - Motor electronics
P030185
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring of cylinder 1 has been detected. There is a
signal above the permissible limit value.

N3/10 - Motor electronics
P030385
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring of cylinder 3 has been detected. There is a
signal above the permissible limit value.

N3/10 - Motor electronics
P030685
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring of cylinder 6 has been detected. There is a
signal above the permissible limit value.

N3/10 - Motor electronics
P030285
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring of cylinder 2 has been detected. There is a
signal above the permissible limit value.

N3/10 - Motor electronics
P030785
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring of cylinder 7 has been detected. There is a
signal above the permissible limit value.

N3/10 - Motor electronics
P030585
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring of cylinder 5 has been detected. There is a
signal above the permissible limit value.

N3/10 - Motor electronics
P030022
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring has been detected. The signal amplitude is
greater than the maximum amplitude.

N3/10 - Motor electronics
P030885
'MED1775' for combustion engine 'M178' (ME)

Combustion misfiring of cylinder 8 has been detected. There is a
signal above the permissible limit value.

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