12 13 009 Checking ignition coils (M60, M62, S62)

WARNING: This page is about a different variant/trim than selected.

CAUTION: Instructions for working on ignition system,
refer to WORKING ON IGNITION SYSTEM .

Switch off ignition.

Acoustic cover version 1:

(Acoustic cover screwed down)

Remove sealing caps (1).

Release nuts (2).

Remove acoustic cover.

Fig 1: Removing Acoustic Cover Version 1

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Acoustic cover version 2:

(Acoustic cover with press-stud fastener)

Press press-stud fasteners (1 to 4) in succession and simultaneously raise acoustic cover slightly. Remove acoustic cover when all four press-stud fasteners have been unlocked.

Installation:

Position acoustic cover and press downwards until press-stud fasteners (1... 4) are heard to engage.

Fig 2: Removing Acoustic Cover Version 2

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Acoustic cover version 3 (E53):

Turn fasteners on acoustic cover 90° counterclockwise.

Remove acoustic cover.

Fig 3: Removing Acoustic Cover Version 3 (E53)

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M60, M62:

Remove sealing caps.

Release nuts.

Remove covers on ignition coils.

Fig 4: Removing Ignition Coil Cover (M60,M62)

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Installation:

Check profile seal (1) for damage and correct seating, replace if necessary.

Fig 5: Identifying Profile Seal

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S62:

Release cap nuts (1) on left and right.

Remove cover (2) on ignition coils on left and right.

Fig 6: Removing Ignition Coil Cover (S62)

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M60, M62, S62:

Use adapter set 12 7 040 to check ignition coils.

NOTE: Attach special tool 12 7 045 to single adapter 12 7 041.

Fig 7: Identifying Special Tools 12 7 045 & 12 7 041

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Switch off ignition!

Attach single adapters 12 7 041 to ignition coils of left and right cylinder banks.

Fig 8: Attaching Single Adapters To Ignition Coils

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Connect single adapters 12 7 041 with connecting cable set 12 7 043.

NOTE: Pass long connecting cable over engine.

Fig 9: Connecting Single Adapters To Ignition Coils

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Connect DIS Tester to diagnosis socket. Connect RZV connection line of DIS Tester to last test adapter.

Connect trigger pliers of DIS Tester to supply lead of ignition coil of 1st cylinder.

Select < Measurement >
Select < Preset measurements >
Select < Secondary ignition signal >
Select < Stationary ignition distribution >
Select < 8 cylinders >

For subsequent procedure, follow DIS instructions.

Fig 10: Connecting DIS Tester To Diagnosis Socket

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Notes on troubleshooting using adapter set:

Normal oscillogram, refer to NORMAL OSCILLOGRAM (M, S, W ENGINES ONLY) .
Ignition coil comparison, refer to OSCILLOGRAMS OF IGNITION COILS FROM DIFFERENT MANUFACTURERS . MG 12.
Ignition coil fault, refer to IGNITION COIL FAULTS .
Spark plug fault, refer to SPARK-PLUG FAULTS .
Additional fault patterns, refer to FURTHER FAULT PATTERNS WITH EVALUATION .
Fault on injection system, refer to FAULT IN FUEL INJECTION SYSTEM .
Additional fault instructions, refer to ADDITIONAL FAULT NOTES FOR TROUBLESHOOTING .