Ignition Coil N152, Checking: Requirements

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The Ignition Coil N152 fuse OK.
The Fuel Pump (FP) Relay J17 OK.
The Engine Speed (RPM) Sensor G28 OK.
The Camshaft Position (CMP) Sensor G40 OK.
The battery voltage must be at least 12.5 Volts.
All electrical consumers such as, lights and rear window defroster, switched off.
Vehicles with automatic transmission, shift selector lever into position "P" or "N".
A/C switched off.
Ground (GND) connections between engine/transmission/chassis OK.
Ignition switched off