Volkswagen Golf / Golf GTI / Golf Variant. Manual - part 211

– NO:

♦ GATHER more information from customer

about the complaint.

• 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:

♦ GO TO: Step 3

– NO:

♦ REPLACE: Oxygen Sensor 1 Before Catalytic

Converter - GX10- . Refer to appropriate repair

manual.

♦ GO TO: Step 7

• 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:

♦ 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.
♦ GO TO: Step 7

⇒ “3.3 Diagnostic Modes 01 - 0A”, page 21

• 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,

• SPECIFIED VALUE: Mode 6 Pass.
• IGNITION: OFF.
– Were Values obtained?

– YES:

♦ GO TO: Step 5

– NO:

♦ GO TO: Step 6

• 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.

♦ GO TO: Step 7

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing

517

Step

Procedure

Result / Action to Take

• 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

⇒ “3.3.4 Diagnostic Mode 04 - Erase DTC

• 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

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

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

• PERFORM: Preliminary Check to verify the

customers concern. Refer to

⇒ “3.1 Preliminary Check ”, page 18

– Was Complaint verified?

– YES:

♦ GO TO: Step 2

– 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

• 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

• 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

• 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

• 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