Volkswagen Golf / Golf GTI / Golf Variant. Manual — part 197
Step
Procedure
Result / Action to Take
2
• IGNITION: OFF.
• DISCONNECT: Suspected Cam Adjustment
Actuator(s) harness connector.
• CHECK: Suspected Cam Adjustment Actuator
(s) component connector terminals 1 to 2 for
resistance. Refer to appropriate wiring dia‐
gram.
• SPECIFIED VALUE: 7 – 10 Ω (@ approx. 20°
C).
– Was Value obtained?
– YES:
– NO:
♦ REPLACE: Cam Adjustment Actuator(s) . Re‐
fer to appropriate repair manual.
3
• IGNITION: ON.
• CHECK: Suspected Cam Adjustment Actuator
(s) harness connector terminal 2 to ground for
voltage. Refer to appropriate wiring diagram.
• 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
4
• REMOVE: Engine Control Module - J623- .
Refer to appropriate repair manual.
• CHECK: Suspected Cam Adjustment Actuator
(s) harness connector terminal 1 to the Engine
Control Module - J623- harness connector for
resistance. Refer to appropriate wiring dia‐
gram.
• SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
– 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
461
Step
Procedure
Result / Action to Take
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.
3.6.3
Camshaft Adjustment Valve 1 - N205- ,
Checking
General Description
The camshaft’s task is to operate the valves at the right time and
in the right order to control the charge cycle. Camshaft adjustment
using the Camshaft Adjustment Valve 1 - N205- varies the open‐
ing times of the valves to suit all operating conditions. This en‐
sures ideal charge cycles within a wide range of engine speeds
and loads. Fuel consumption and pollutant emissions are re‐
duced, torque and smoothness increased. In engines with a
double overhead camshaft the size and positioning of the valve
opening overlap can be influenced, enhancing characteristics in
full-load and part-load operation. In continuous camshaft adjust‐
ment, the adjustment is infinitely variable within specific parame‐
ters.
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.
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
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Rep. Gr. ST - Generic Scan Tool
• Vehicles with Auto. Transmission, ensure Selector Lever po‐
sition is in “P”.
• Vehicles with Manual Transmission, ensure Shifter Lever po‐
sition 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.
2
• IGNITION: OFF.
• DISCONNECT: Camshaft Adjustment Valve 1
- N205- harness connector.
• CHECK: Camshaft Adjustment Valve 1 - N205-
component connector terminals 1 to 2 for re‐
sistance.
• SPECIFIED VALUE: 5 to 20 Ω (at approx. 20°
C).
– Was Value obtained?
– YES:
– NO:
♦ REPLACE: Camshaft Adjustment Valve 1 -
N205- . Refer to appropriate repair manual.
3
• IGNITION: ON.
• CHECK: Camshaft Adjustment Valve 1 - N205-
harness connector terminal 1 to ground for
voltage.
• SPECIFIED VALUE: Battery voltage.
• IGNITION: OFF.
– 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
4
• REMOVE: Engine Control Module - J623- .
Refer to appropriate repair manual.
• CHECK: Camshaft Adjustment Valve 1 - N205-
harness connector terminal 2 to the Engine
Control Module - J623- harness connector
T105 / 105 for resistance.
• SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
– 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
463
Step
Procedure
Result / Action to Take
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.
3.6.4
Camshaft Position Sensor 3 - G300- ,
Checking
General Description
Camshaft position sensors are located at each camshaft for con‐
trol and monitoring of the camshaft adjusters. For exact determi‐
nation of the camshaft adjustment, the basic settings (retard
position) of the four camshafts are learned by the control modules
(adaptation). During adaptation, the Camshaft solenoid valves
are de-energized. The camshafts are moved to retard position
(basic setting) both by the setting of the solenoid valves and the
direction of pull exerted by the chain. The position of the camshaft
position sensor signals relative to the engine speed sensor ref‐
erence mark (actual values), is stored as basic position and
compared to the specified values.
This provides the basic values for camshaft timing control. A dis‐
tinction is made between basic and fine adaptation. Basic adap‐
tation is always implemented after the ECM is de-energized (no
Terminal 30) or erasing of DTCs. After starting the engine, the
camshafts briefly remains in the basic position until the exact po‐
sition of the camshafts with respect to the crankshaft has been
established. If the camshafts are already in basic position (valves
de-energized) and the coolant temperature is greater than 185°
F (85° C), and assuming basic adaptation has been implemented,
fine adaptation is always performed briefly several times (for ap‐
proximately one second) after starting the engine. Adaptation of
the inlet camshafts takes place at idle or in the near idle range.
Adaptation of the exhaust camshafts takes place in the engine
speed range between 1,200 and 2,000 RPM and at low engine
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
464
Rep. Gr. ST - Generic Scan Tool
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