Ignition Coil N152 , checking

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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

CAUTION: Do not touch the Ignition Coil connecting parts or adapter cables during the following test.

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.

Ignition Coil N152 electrical harness connector terminal	Motronic Engine Control Module (ECM) J220 electrical harness connector T80 terminal or test box socket
3	78
1	71

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:

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

End of diagnosis