Volkswagen Golf / Golf GTI / Golf Variant. Service manual - part 206

• Vehicles with Auto. Transmission, ensure Selector Lever po‐

sition is in “P”.

• Vehicles with Man. Transmission, ensure Shifter Lever posi‐

tion is in “N” with Parking Brake applied.

• Coolant Temperature: ≥ 80° C.
• Observe all safety precautions:

⇒ “1.1 Safety Precautions”, page 2

 .

• View clean working conditions:

⇒ “1.2 Clean Working Conditions”, page 3

 .

• For Hybrid vehicles refer to:

⇒ “1.3 High Voltage System General Warnings”, page 4

 .

Test Procedure

Step

Procedure

Result / Action to Take

1

• PERFORM: Preliminary Check to verify the

customers complaint. Refer to

⇒ “3.1 Preliminary Check ”, page 18

 .

– Was Complaint verified?

– YES:

♦ GO TO: Step 2 

⇒ page 497

 .

– NO:

♦ GATHER more information from customer

about the complaint.

2

• IGNITION: OFF.
• REMOVE: Evaporative Canister. Refer to ap‐

propriate repair manual.

• Plug or Cap off the Fuel Tank Pressure Sensor

- G400- hose going to the vent filter.

• CONNECT: Hand vacuum pump to the Fuel

Tank Pressure Sensor - G400- and apply

0.700 bar and see if the vacuum holds.

– Did the vacuum hold?

– YES:

♦ GO TO: Step 3 

⇒ page 497

 .

– NO:

♦ REPLACE: Fuel Tank Pressure Sensor -

G400- . Refer to appropriate repair manual.

♦ GO TO: Step 5 

⇒ page 498

 .

3

• DISCONNECT: Fuel Tank Leak Detection

Control Module - J909 - harness connector.

• IGNITION: ON.
• CHECK: Fuel Tank Leak Detection Control

Module - J909 - harness connector terminal 4

to ground for voltage.

• IGNITION: OFF.
• SPECIFIED VALUE: Battery voltage.
– Was Value obtained?

– YES:

♦ GO TO: Step 4 

⇒ page 498

 .

– NO:

♦ PERFORM: Visual Inspection of wiring and

component.

♦ CHECK: Wiring for open, high resistance,

short or harness connector for damage, corro‐

sion, loose or broken terminals.

♦ REPAIR: Faulty wiring or connector.
♦ GO TO: Step 5 

⇒ page 498

 .

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing    

497

Step

Procedure

Result / Action to Take

4

• REMOVE: Engine Control Module - J623- .

Refer to appropriate repair manual.

• DISCONNECT: Fuel Tank Pressure Sensor -

G400- . Refer to appropriate repair manual.

• CHECK: Fuel Tank Leak Detection Control

Module - J909 - harness connector terminal 2

to the Engine Control Module - J623- harness

connector T91 / 38 for resistance.

• CHECK: Fuel Tank Leak Detection Control

Module - J909 - harness connector terminal 3

to the Engine Control Module - J623- harness

connector T91 / 78 for resistance.

• CHECK: Fuel Tank Leak Detection Control

Module - J909 - harness connector terminal 1

to the Fuel Tank Pressure Sensor - G400- har‐

ness connector terminal 1 for resistance.

• CHECK: Fuel Tank Leak Detection Control

Module - J909 - harness connector terminal 5

to the Fuel Tank Pressure Sensor - G400- har‐

ness connector terminal 3 for resistance.

• SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
– Were Values obtained?

– YES:

♦ REPLACE: Fuel Tank Leak Detection Control

Module - J909 - . Refer to appropriate repair

manual.

♦ GO TO: Step 5 

⇒ page 498

 .

– NO:

♦ PERFORM: Visual Inspection of wiring and

component.

♦ CHECK: Wiring for open, high resistance,

short or harness connector for damage, corro‐

sion, loose or broken terminals.

♦ REPAIR: Faulty wiring or connector.
♦ GO TO: Step 5 

⇒ page 498

 .

5

• Final Procedure
• Perform a road test to verify repair.
– Does the original DTC return?

– YES:

♦ CHECK: Engine Control Module - J623- har‐

ness connector for any damaged, pushed-out

pins.

♦ REPAIR: As necessary.
♦ Clear the DTC’s. Refer to

⇒ “3.3.4 Diagnostic Mode 04 - Erase DTC

Memory”, page 26

 .

♦ Repair is complete. Generate Readiness

Code. Refer to

⇒ “3.2 Readiness Codes”, page 19

 .

♦ Return vehicle to Customer.
♦ If all electrical connections are OK:
♦ REPLACE: Engine Control Module - J623- .

Refer to appropriate repair manual.

♦ Repair is complete. Generate Readiness

Code. Refer to

⇒ “3.2 Readiness Codes”, page 19

 .

♦ Return vehicle to Customer.
– NO:

♦ Perform the diagnostic procedure for any

DTC’s.

♦ If no DTC’s return the repair is complete.
♦ Return vehicle to customer.

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

498

     Rep. Gr. ST - Generic Scan Tool

3.6.20

Ignition Coils with Power Output Stage ,

Checking

General Description
The ignition coil must transform the relatively low 12 V on-board

vehicle voltage to the high ignition voltage required and supply

the energy stored in that voltage to the spark plug. The functional

principle of the ignition coil is relatively simple. It has a primary

winding (small number of turns) and a secondary winding (lots of

turns). The turn ratio between the number of primary and secon‐

dary winding turns determines the level of the voltage generated

at the output. Ignition Coils With Power Output Stage are plugged

directly into the spark plug. This means that the ignition energy

can be transferred directly to the spark plug with virtually zero

power loss.
Special tools and workshop equipment required
♦ Multimeter.
♦ Wiring Diagram.
♦ Scan Tool.
♦ LED Test Lamp.
Test requirements
• Fuses OK.
• Battery voltage OK.
• Switch OFF all electrical and electronic accessories.
• Vehicles with Auto. Transmission, ensure Selector Lever po‐

sition is in “P”.

• Vehicles with Man. Transmission, ensure Shifter Lever posi‐

tion is in “N” with Parking Brake applied.

• Coolant Temperature: ≥ 80° C.
• Observe all safety precautions:

⇒ “1.1 Safety Precautions”, page 2

 .

• View clean working conditions:

⇒ “1.2 Clean Working Conditions”, page 3

 .

• For Hybrid vehicles refer to:

⇒ “1.3 High Voltage System General Warnings”, page 4

 .

Test Procedure

Step

Procedure

Result / Action to Take

1

• PERFORM: Preliminary Check to verify the

customers concern. Refer to

⇒ “3.1 Preliminary Check ”, page 18

 .

– Was Complaint verified?

– YES:

♦ GO TO: Step 2 

⇒ page 500

 .

– NO:

♦ GATHER more information from customer

about the complaint.

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing    

499

Step

Procedure

Result / Action to Take

2

• IGNITION: OFF.
• DISCONNECT: Suspected Ignition Coil With

Power Output Stage harness connector.

• IGNITION: ON.
• CHECK: Ignition Coil With Power Output Stage

harness connector terminal 4 to 1 for voltage.

• CHECK: Ignition Coil With Power Output Stage

harness connector terminal 4 to 3 for voltage.

• SPECIFIED VALUE: Battery voltage.
• IGNITION: OFF.
– Were Values obtained?

– YES:

♦ GO TO: Step 3 

⇒ page 500

 .

– NO:

♦ CHECK: Wiring for opens, high resistance,

short or harness connector for damage, corro‐

sion, loose or broken terminals.

♦ REPAIR: Faulty wiring or connector.
♦ REPLACE: Any open fuses.
♦ GO TO: Step 5 

⇒ page 501

 .

3

• REMOVE: Engine Control Module - J623- .

Refer to appropriate repair manual.

• CHECK: Suspected Ignition Coil With Power

Output Stage harness connector terminal 2 to

the Engine Control Module - J623- harness

connector terminals (refer to the wiring dia‐

gram for proper terminal locations).

• SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
– Was Value obtained?

– YES:

♦ GO TO: Step 4 

⇒ page 500

 .

– NO:

♦ CHECK: Wiring for open, high resistance,

short or harness connector for damage, corro‐

sion, loose or broken terminals.

♦ REPAIR: Faulty wiring or connector.
♦ GO TO: Step 5 

⇒ page 501

 .

4

• DISABLE: Fuel Injectors . Refer to appropriate

electrical schematic for in-line connector loca‐

tions and/or fuses.

• DISCONNECT: Cold Start Injector (if applica‐

ble).

• CONNECT: LED Test Lamp to suspected Ig‐

nition Coil With Power Output Stage harness

connector terminals 2 to 3.

• CRANK: Engine.
• SPECIFIED VALUE: LED Test Lamp should

flicker ON & OFF.

– Was Value obtained?

– YES:

♦ GO TO: Step 5 

⇒ page 501

 .

– NO:

♦ GO TO: Step 5 

⇒ page 501

 .

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

500

     Rep. Gr. ST - Generic Scan Tool