Jetta SportWagen L5-2.5L (CBUA) (2009)
Ignition Coil: Testing and Inspection
Ignition Coils with Power Output Stage, Checking
The following procedure is used to diagnose all Ignition Coils with Power Output Stage.
Special tools, testers and auxiliary items required
‹› multimeter.
‹› Diode test lamp.
‹› Wiring diagram.
Test requirements
‹› The Ignition Coils with Power Output Stage (N70, N127, N291, N292, N323) fuses OK.
‹› The Motronic Engine Control Module (ECM) Power Supply Relay (J271) OK.
‹› The Engine Speed (RPM) Sensor (G28) OK, --> [ Engine Speed Sensor, Checking ] See: Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Engine Speed Sensor, Checking.
‹› The Camshaft Position (CMP) Sensor (G40)OK, --> [ Camshaft Position Sensor, Checking ] See: Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Camshaft Position Sensor, Checking.
‹› Battery voltage 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.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] See: Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Preliminary Check
Start diagnosis
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Remove the engine cover with air filter
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Remove the Ignition Coils with Power Output Stage (N70, N127, N291, N292, N323) electrical harness screws - 1 -.