Volkswagen Golf / Golf GTI / Golf Variant. 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:
– 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:
– NO:
♦ REPLACE: Fuel Tank Pressure Sensor -
G400- . Refer to appropriate repair manual.
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:
– 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
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
.
– 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
.
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
.
♦ 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:
– 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
.
– 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
.
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
.
– 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
.
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
.
– NO:
♦ GO TO: Step 5
.
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
500
Rep. Gr. ST - Generic Scan Tool
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