Preliminary Procedures

WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, 2001 BMW X5, and 2000 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Carry out secondary voltage check using test adapter 12 7 040.

IMPORTANT: Observe safety precautions.

Switch off ignition.

NOTE: The following checks can be carried out with the adapter kit:

Secondary voltage check. See Figure -Figure .
Comparison between ignition coils from different manufacturers. See OSCILLOGRAMS OF IGNITION COILS FROM DIFFERENT MANUFACTURERS .
Ignition coil faults IGNITION COIL FAULTS
Spark plug faults SPARK-PLUG FAULTS
Injection system faults

Fig 1: Identifying Adapter Kit
Courtesy of BMW OF NORTH AMERICA, INC.

Connect special tool 12 7 043 (connecting cable) to special tool 12 7 041 (single adapter).

Fig 2: Identifying Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Checks on engines with single-spark ignition coils:

Special tool 12 7 041 (single adapter) in conjunction with special tool 12 7 045 for fitting onto ignition coil.

Fig 3: Checking Engines With Single-Spark Ignition Coils

Courtesy of BMW OF NORTH AMERICA, INC.

Remove cover for ignition coils.