Volkswagen Golf / Golf GTI / Golf Variant. Service manual - part 199

♦ Scan Tool.
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 469

 .

– NO:

♦ GATHER more information from customer

about the complaint.

2

• IGNITION: OFF.
• DISCONNECT: Charge Air Pressure Sensor -

G31- harness connector.

• IGNITION: ON.
• CHECK: Charge Air Pressure Sensor - G31-

harness connector terminals 1 to 3 for voltage.

• SPECIFIED VALUE: About 5.0 V.
• IGNITION: OFF.
– Was Value obtained?

– YES:

♦ GO TO: Step 3 

⇒ page 469

 .

– NO:

♦ GO TO: Step 4 

⇒ page 470

 .

3

• REMOVE: Engine Control Module - J623- .

Refer to appropriate repair manual.

• CHECK: Charge Air Pressure Sensor - G31-

harness connector terminal 2 to the Engine

Control Module - J623- harness connector

T91 / 54 for resistance.

• CHECK: Charge Air Pressure Sensor - G31-

harness connector terminal 4 to the Engine

Control Module - J623- harness connector

T91 / 55 for resistance.

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

– YES:

♦ GO TO: Step 5 

⇒ page 470

 .

– 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 470

 .

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing    

469

Step

Procedure

Result / Action to Take

4

• REMOVE: Engine Control Module - J623- .

Refer to appropriate repair manual.

• CHECK: Charge Air Pressure Sensor - G31-

harness connector terminal 1 to the Engine

Control Module - J623- harness connector

T91 / 35 for resistance.

• CHECK: Charge Air Pressure Sensor - G31-

harness connector terminal 3 to the Engine

Control Module - J623- harness connector

T91 / 32 for resistance.

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

– YES:

♦ GO TO: Step 5 

⇒ page 470

 .

– 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 470

 .

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.

3.6.7

Charge Pressure Actuator - V465- /

Charge Pressure Actuator Position Sen‐

sor - G581- , Checking

General Description
The Engine Control Module - J623- computes the nominal charge

pressure from the requested torque. If the actual charge pressure

deviates from the nominal charge pressure, the wastegate* is

opened further by the Charge Pressure Actuator - V465- (charge

pressure decreases) or closed further (charge pressure increa‐

ses). The rapid response of the Charge Pressure Actuator - V465-

ensures that the wastegate opens quickly in overrun mode,

thereby reducing the pumping effort of the turbocharger. The

wastegate is closed in the start position. The Charge Pressure

Actuator - V465- is activated by the PWM signal, and the Charge

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

470

     Rep. Gr. ST - Generic Scan Tool

Pressure Actuator Position Sensor - G581- provides position

feedback.
Special tools and workshop equipment required
♦ Multimeter.
♦ Wiring Diagram.
♦ Scan Tool.
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 471

 .

– NO:

♦ GATHER more information from customer

about the complaint.

2

• IGNITION: OFF.
• DISCONNECT: Charge Pressure Actuator -

V465- / Charge Pressure Actuator Position

Sensor - G581- harness connector.

• CHECK: Charge Pressure Actuator - V465- /

Charge Pressure Actuator Position Sensor -

G581- component connector terminals 2 to 6

for resistance.

• SPECIFIED VALUE: 2.4 – 4.6 Ω (@ approx.

20° C).

– Was Value obtained?

– YES:

♦ GO TO: Step 3 

⇒ page 471

 .

– NO:

♦ REPLACE: Charge Pressure Actuator -

V465- / Charge Pressure Actuator Position

Sensor - G581- . Refer to appropriate repair

manual.

♦ GO TO: Step 6 

⇒ page 473

 .

3

• IGNITION: ON.
• CHECK: Charge Pressure Actuator - V465- /

Charge Pressure Actuator Position Sensor -

G581- harness connector terminals 1 to 3 for

voltage.

• SPECIFIED VALUE: About 5.0 V.
• IGNITION: OFF.
– Was Value obtained?

– YES:

♦ GO TO: Step 5 

⇒ page 472

 .

– NO:

♦ GO TO: Step 4 

⇒ page 472

 .

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing    

471

Step

Procedure

Result / Action to Take

4

• REMOVE: Engine Control Module - J623- .

Refer to appropriate repair manual.

• CHECK: Charge Pressure Actuator - V465- /

Charge Pressure Actuator Position Sensor -

G581- harness connector terminal 1 to the En‐

gine Control Module - J623- harness connector

T105 / 35 for resistance.

• CHECK: Charge Pressure Actuator - V465- /

Charge Pressure Actuator Position Sensor -

G581- harness connector terminal 3 to the En‐

gine Control Module - J623- harness connector

T105 / 33 for resistance.

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

– YES:

♦ GO TO: Step 6 

⇒ page 473

 .

– 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 6 

⇒ page 473

 .

5

• REMOVE: Engine Control Module - J623- .

Refer to appropriate repair manual.

• CHECK: Charge Pressure Actuator - V465- /

Charge Pressure Actuator Position Sensor -

G581- harness connector terminal 2 to the En‐

gine Control Module - J623- harness connector

T105 / 88 for resistance.

• CHECK: Charge Pressure Actuator - V465- /

Charge Pressure Actuator Position Sensor -

G581- harness connector terminal 5 to the En‐

gine Control Module - J623- harness connector

T105 / 41 for resistance.

• CHECK: Charge Pressure Actuator - V465- /

Charge Pressure Actuator Position Sensor -

G581- harness connector terminal 6 to the En‐

gine Control Module - J623- harness connector

T105 / 89 for resistance.

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

– YES:

♦ GO TO: Step 6 

⇒ page 473

 .

– 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 6 

⇒ page 473

 .

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

472

     Rep. Gr. ST - Generic Scan Tool