Ignition Coil N152 , checking

The following procedure is used to diagnose l Ignition Coil.

Special tools, testers and auxiliary items required 

• Multimeter.
• Diode test lamp.
• Wiring diagram.

Test requirements 

• The Ignition Coil N152 fuse OK.
• The Fuel Pump (FP) Relay J17 OK. → Voltage supply, checking 
• The Engine Speed (RPM) Sensor G28 OK, → Engine Speed (RPM) Sensor G28 , checking  .
• The Camshaft Position (CMP) Sensor G40 OK, → Camshaft Position (CMP) Sensor G40 , 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 

• Perform a preliminary check to verify the customers complaint. Refer to → Motronic Engine Control Module (ECM) J220 , replacing 

Start diagnosis 

• Remove the engine cover with air filter.

Fig 1: Identifying Ignition Coil With Final Output Stage Black 6-Pin Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Remove the Ignition Coil N152 electrical connector.

Checking voltage supply 

• Switch the ignition on.

Fig 2: 4-Pin Electrical Harness Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Using a Multimeter , check the Ignition Coil electrical harness connector terminals 2 to 4 for voltage.

Specified value: battery voltage.

• Switch the ignition off.

If the specified value was not obtained:

• Check Ignition Coil electrical harness connector terminal 2 to the Fuse (on fuse panel) 29 for an open circuit.

Specified value: 1.5 Ω Max.

If the specified value was not obtained:

• Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
• Check the wiring connection for damage, corrosion, loose or broken terminals.
• If necessary, repair the faulty wiring connection.

If the specified values were obtained:

Checking activation 

• Disable the power supply to the Fuel Injectors N30, N31, N32, N33, by removing Fuse 29 (on fuse panel B) from the fuse holder SB29, in the E-box, plenum chamber.

Fig 3: 4-Pin Electrical Harness Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Using a diode test lamp , check the Ignition Coil electrical harness connector terminals 1 to 4 and 3 to 4 for voltage.
• Operate the starter.

The LED should flicker.

• Switch the ignition off.

If the LED flickers and the voltage was OK:

• Replace the faulty Ignition Coil N152. Refer to 28 - Ignition/Glow plug System  .

If the LED does not flicker:

Checking wiring 

If the manufacturers test box is being used. Perform the following step.

• Install the Adapter F/VAG1598 (68 Pin) VAG1598/22. Refer to 24 MULTIPORT FUEL INJECTION (MFI) .

If the manufacturers test box is not being used. Perform the following step.

• Remove the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing  .

Fig 4: 4-Pin Electrical Harness Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Using a Multimeter , Check the Ignition Coil electrical harness connector to the Motronic Engine Control Module (ECM) J220 electrical harness connector T80 for an open circuit.

Specified value: 1.5 Ω Max.

If the specified value was not obtained:

• Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
• Check the wiring connection for damage, corrosion, loose or broken terminals.
• If necessary, repair the faulty wiring connection.
• Re-enable the power supply to the Fuel Injectors N30, N31, N32, N33, by reinstalling Fuse 29 (on fuse panel B) from the fuse holder SB29, in the E-box, plenum chamber.

Fig 5: Identifying Ignition Coil Electrical Harness Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Re-connect the Ignition Coil N152 electrical harness connector to the Ignition Coil N152.
• Install the engine cover with air filter.
• Erase the DTC memory. Refer to → Diagnostic Mode 04: Reset/delete diagnostic data 
• Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to → Readiness Code  .

• End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:

• Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing  .
• Assembly is performed in the reverse of the removal.

Final procedures 

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to.
2. If necessary, erase the DTC memory. Refer to.
3. If the DTC memory was erased, generate readiness code. Refer to.

End of diagnosis