Volkswagen Golf / Golf GTI / Golf Variant. Manual — part 211
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.
• DISCONNECT: Oxygen Sensor 1 Before Cat‐
alytic Converter - GX10- harness connector.
• CHECK: Oxygen Sensor 1 Before Catalytic
Converter - GX10- component connector ter‐
minals 3 to 4 for resistance.
• SPECIFIED VALUE: 2 - 4 Ω ( @ 25° C).
– Was Value obtained?
– YES:
– NO:
♦ REPLACE: Oxygen Sensor 1 Before Catalytic
Converter - GX10- . Refer to appropriate repair
manual.
3
• IGNITION: ON.
• CHECK: Oxygen Sensor 1 Before Catalytic
Converter - GX10- 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 7
4
• RECONNECT: Oxygen Sensor 1 Before Cat‐
alytic Converter - GX10- harness connector.
• CONNECT: Scan Tool.
• START: Engine and let Idle.
• Perform the function test located in diagnostic
mode 06. Refer to appropriate Diagnostic
Mode 06 - Read Test Results for Specific Di‐
agnostic Functions,
⇒ “3.3 Diagnostic Modes 01 - 0A”, page 21
• SPECIFIED VALUE: Mode 6 Pass.
• IGNITION: OFF.
– Were Values obtained?
– YES:
– NO:
5
• FAULT: Is intermittent.
• 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.
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
3. Diagnosis and Testing
517
Step
Procedure
Result / Action to Take
6
• REMOVE: Engine Control Module - J623- .
Refer to appropriate repair manual.
• CHECK: Oxygen Sensor 1 Before Catalytic
Converter - GX10- harness connector terminal
1 to the Engine Control Module - J623- harness
connector T91 / 43 for resistance.
• CHECK: Oxygen Sensor 1 Before Catalytic
Converter - GX10- harness connector terminal
2 to the Engine Control Module - J623- harness
connector T91 / 44 for resistance.
• CHECK: Oxygen Sensor 1 Before Catalytic
Converter - GX10- harness connector terminal
3 to the Engine Control Module - J623- harness
connector T91 / 74 for resistance.
• CHECK: Oxygen Sensor 1 Before Catalytic
Converter - GX10- harness connector terminal
5 to the Engine Control Module - J623- harness
connector T91 / 41 for resistance.
• SPECIFIED VALUE: 0.5 Ω ( ± 0.3 Ω ).
– Were Values obtained?
– YES:
♦ GO TO: Step 7
.
– 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 7
.
7
• 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
518
Rep. Gr. ST - Generic Scan Tool
3.6.29
Secondary Air Injection Pump Motor -
V101- / Secondary Air Injection Pump
Relay - J299- , Checking
General Description
Injecting additional air into the exhaust pipe triggers an exother‐
mic reaction. This leads to the combustion of HC and CO com‐
ponents that prevail mainly during the warm up phase. This
oxidation process releases additional heat. Consequently, the
exhaust gas becomes hotter, causing the catalytic converter to
heat up at a faster rate. For spark-ignition engines, secondary-air
injection is an effective means of reducing HC and CO emissions
after starting the engine and to rapidly heat up the catalytic con‐
verter. This ensures that the conversion of NOx emissions com‐
mences earlier.
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: ≤ 20 °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
Note
The engine MUST be cold (room temperature) in order for the
ECM to command the air pump relay ON. The pump runs for ap‐
proximately 20 – 100 seconds. Once the engine has been started,
the ECM may not command the pump to run again for approx 6-8
hrs of engine off time. Due to potential damage to the catalyst,
the generic scan tool has no provision for SAI relay control.
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
519
Step
Procedure
Result / Action to Take
2
• IGNITION: OFF
• DISCONNECT: Secondary Air Injection Pump
Relay - J299- from the Fuse Panel B - SB- .
• CONNECT: Jumper wire, Secondary Air Injec‐
tion Pump Relay - -J299-- socket terminals
5/87 and 3/30.
• SPECIFIED VALUE: The Secondary Air Injec‐
tion Pump Motor - V101- should be heard run‐
ning.
– Was Value obtained?
– YES:
♦ GO TO: Step 6
.
– NO:
♦ GO TO: Step 3
.
3
• DISCONNECT: Jumper wire, Secondary Air
Injection Pump Relay - -J299-- socket termi‐
nals 5/87 and 3/30.
• IGNITION: ON.
• CHECK: Secondary Air Injection Pump Relay
- J299- socket terminals 5/87 and 1/86 to
ground for voltage.
• IGNITION: OFF.
• SPECIFIED VALUE: Battery voltage.
– Were Values obtained?
– YES:
♦ GO TO: Step 4
.
– 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.
♦ REPLACE: Any open fuses.
♦ GO TO: Step 7
.
4
• REINSTALL: Secondary Air Injection Pump
Relay - J299- into the Fuse Panel B - SB- .
• DISCONNECT: Secondary Air Injection Pump
Motor - V101- harness connector.
• IGNITION: ON.
• CHECK: Secondary Air Injection Pump Motor
- V101- harness connector terminals 1 to 2 for
voltage.
• IGNITION: OFF.
• SPECIFIED VALUE: Battery voltage.
– Was Value obtained?
– YES:
♦ REPLACE: Secondary Air Injection Pump Mo‐
tor - V101- , Refer to appropriate repair man‐
ual.
♦ GO TO: Step 7
.
– NO:
♦ GO TO: Step 5
.
5
• REMOVE: The Fuse from the Fuse Panel B -
SB- . Refer to appropriate wiring diagram for
fuse designation.
• CHECK: Secondary Air Injection Pump Motor
- V101- harness connector terminal 1 to ground
for resistance.
• CHECK: Secondary Air Injection Pump Motor
- V101- harness connector terminal 2 to output
cavity of Fuse 11 (On Fuse Panel B) - SB11-
for resistance.
• SPECIFIED VALUE: 0.5 Ω ( ± 0.3 Ω ).
– Were Values obtained?
– YES:
♦ GO TO: Step 6
.
– 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.
♦ REPLACE: Any open fuses.
♦ GO TO: Step 7
.
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
520
Rep. Gr. ST - Generic Scan Tool
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