Ignition coil (vehicles with engine code AFP), checking: Notes

Recommended special tools and equipment

Test requirements

Fig 1: Identifying Main Fuse Panel

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Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Battery voltage must be at least 11.5 volts.
All electrical consumers such as, for example, lights and rear window defroster must be switched off.
Parking brake must be engaged or else daylight driving lights will be switched on.
For vehicles with automatic transmission, selector lever must be in -P-.

Ground (GND) connections between engine and chassis must be OK.
Engine speed (RPM) sensor must be OK, checking. Refer to Engine speed (RPM) sensor, checking .
Camshaft Position (CMP) sensors must be OK, checking. Refer to Camshaft Position (CMP) sensor, checking .
Ignition switched off.

Test sequence

Fig 2: 5-Pin Connector At Ignition Coil N152

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Checking voltage supply

Fig 3: Measuring Voltage Between Terminals 1 & 5 Of Disconnected Ignition Coil Connector

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Connect multimeter to terminals 1 + 5 of disconnected connector for voltage measurement.
Switch ignition on.

Specified value: at least 11.5 V

If there is no voltage:

Fig 4: 5-Pin Connector Terminals 1 & 5

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Check wire between 5-pin connector terminal 5 and relay carrier for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

Check for open circuit in wire between 5-pin connector terminal 1 and Ground (GND) according to wiring diagram.

Wire resistance: max. 1.5 Ω

Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
Generate readiness code. Refer to Readiness code, generating

If there is no malfunction in voltage supply: