Work sequence

• Connect scan tool VAG1551 (or VAG1552). Then switch ignition on and select Motronic Engine Control Module (ECM) J220 with the "Address word" 01. (Connecting scan tool and selecting Engine Control Module (ECM) → VAG1551 and Motronic Engine Control Module (ECM) J220, connecting and selecting  ).

Work step 1: Check DTC memory 

Indicated on display:

Rapid data transfer HELP Select function XX

• Operate scan tool taking into account the information on the display:
• Press buttons 0 and 2 for function "Check DTC memory" and confirm entry with Q button.

The number of Diagnostic Trouble Codes (DTCs) stored or "No DTC detected!" will be shown on the display.

X Diagnostic Trouble Codes (DTCs) detected!

If a DTC is stored:

Repair Diagnostic Trouble Codes (DTCs) printed out using DTC table:

• SAE P0 codes → DTC table: SAE P0 codes  ,
• SAE P1 codes → DTC table: SAE P1 codes  ,
• SAE P2 codes → DTC table: SAE P2 codes 
• SAE P3 codes → DTC table: SAE P3 codes  .

If no DTC is stored:

• Press → button.
• Continue with work step 3

Work step 2: Erase DTC memory 

Indicated on display:

Rapid data transfer HELP Select function XX

• Press buttons 0 and 5 for function "Erase DTC memory" and confirm entry with Q button.

Indicated on display:

Rapid data transfer → DTC memory is erased!

• Press → button.

Work step 3: Adjust the Throttle Valve Control Module J338 to the Motronic Engine Control Module (ECM) J220 

Indicated on display:

Rapid data transfer HELP Select function XX

• Press buttons 0 and 4 for function "Initiate basic setting" and confirm entry with Q button.

Indicated on display:

Basic setting Input display group number XXX

• Press buttons 0, 6 and 0 for "Display group number 60" and confirm entry with Q button.

Indicated on display: (1 to 4 = display zones)

System in basic setting 60 → xxx.x % xxx.x % x ADP. runs

• Check specifications in display zones 3 and 4:

Display zone 3: 0 to 8

Display zone 4: ADP. runs, ADP. OK.

Indicated on display: (1 to 4 = display zones)

System in basic setting 60 → xxx % xxx % 8 ADP. OK.

• Terminate engine basic setting at earliest after 30 seconds by pressing → button.

If the display does not indicate as described:

• Check Throttle Valve Control Module J338 → Throttle Valve Control Module J338, checking .

If the display indicates as described:

• Start engine and run at idle.

Work step 4: Requesting temperature 

Indicated on display:

Rapid data transfer HELP Select function XX

• Press buttons 0 and 8 for function "Read measured value (data) block" and confirm entry with Q button.

Indicated on display:

Read measured value block Input display group number XXX

• Press buttons 0, 0 and 4 for "Display group number 4" and confirm entry with Q button.

Indicated on display: (1 to 4 = display zones)

Read measured value block 4 → 1 2 3 4

• Read Engine Coolant Temperature value in display zone 3.

Specification: 85 to 110 ° C

• Read Intake Air Temperature value in display zone 4.

Specification: Ambient temperature less than 80 ° C

If the specifications are obtained:

• Press → button.

Work step 5: Evaporative Emissions (EVAP) Canister system diagnosis (Tank ventilation system) 

Indicated on display:

Rapid data transfer HELP Select function XX

• Press buttons 0 and 4 for function "Initiate basic setting" and confirm entry with Q button.

Indicated on display:

Basic setting Input display group number XXX

• Press buttons 0, 7 and 1 for "Display group number 71" and confirm entry with Q button.

Indicated on display: (1 to 4 = display zones)

System in basic setting 71 → 1 2 3 4

If "Reed op." appears in display zone 1:

• Open fuel tank filler cap briefly to release pressure in fuel tank. This will close reed terminal.

If the diagnosis is initiated by the Motronic Engine Control Module (ECM) J220 the display in display zone 4 jumps from "Test OFF" to "Test ON".

• Leave engine running at idle until specification "Sys. OK." is displayed in display zone 4.

If "Sm leak or La leak" (meaning Small leak or Large leak) appears in display zone 2 and "Sys. n.OK." appears in display zone 4:

• Press → button.
• Check DTC memory, repair Diagnostic Trouble Codes (DTCs) if necessary and then erase DTC memory → DTC memory, checking and erasing  , DTC memory, checking and erasing.
• Read readiness code → Read readiness code  . If the DTC memory has been erased, the readiness code must be generated again → Generating readiness code  .

If no DTC is stored:

• Check Evaporative Emissions (EVAP) Canister system for leaks: → 20 - FUEL SUPPLY

If "Sys. OK." appears in display zone 4:

• Press → button.

Work step 6: Oxygen Sensor (O2S) control diagnosis status before Three Way Catalytic Converter (TWC) 

Indicated on display:

Rapid data transfer HELP Select function XX

• Press buttons 0 and 8 for function "Read measured value (data) block" and confirm entry with Q button.

Indicated on display:

Read measured value block Input display group number XXX

• Press buttons 0, 3 and 0 for "Display group number 30" and confirm entry with Q button.

Indicated on display: (1 to 2 = display zones)

Read measured value block 30 → 1 2

• Check Oxygen Sensor (O2S) control status before Three Way Catalytic Converter (TWC) (display zone 1):

Specification: 111

Significance of figures in 3 digit number block Significance of characters in 3 digit number block, display zones 1 and 2 - Status of Oxygen Sensor (O2S) control before and after Three Way Catalytic Converter (TWC)  .

If the specification is not obtained:

• Press → button.
• Check Oxygen Sensor (O2S) heater of Oxygen Sensor (O2S) before Three Way Catalytic Converter (TWC) → Heated Oxygen Sensor (HO2S), checking .

If the specification is obtained:

• Press → button.

Work step 7: Oxygen Sensor (O2S) aging diagnosis of Oxygen Sensor (O2S) before Three Way Catalytic Converter (TWC) 

Indicated on display:

Rapid data transfer HELP Select function XX

• Press buttons 0 and 4 for function "Initiate basic setting" and confirm entry with Q button.

Indicated on display:

Basic setting Input display group number XXX

• Press buttons 0, 3 and 4 for "Display group number 34" and confirm entry with Q button.

Indicated on display: (1...4 = display zones)

System in basic setting 34 → 1 2 3 4

• Depress brake pedal and hold.
• Depress accelerator down to wide open throttle position.

Engine speed will be increased by Motronic Engine Control Module (ECM) J220 to approx. 2300 rpm.

• Depress brake pedal and accelerator down until display in display zone 4 jumps from "Test OFF" to "Test ON". When performing this test Three Way Catalytic Converter (TWC) temperature in display zone 2 must be at least 380 ° C.

• Depress brake pedal and accelerator down until display zone 4 displays specification "B1-P1 OK.".
• Release brake and accelerator pedals.

If "B1 P1 n.OK." appears in display zone 4:

• Press → button.
• Check DTC memory, repair Diagnostic Trouble Codes (DTCs) if necessary and then erase DTC memory → DTC memory, checking and erasing  , DTC memory, checking and erasing.
• Read readiness code → Read readiness code  . If the DTC memory has been erased, the readiness code must be generated again → Generating readiness code  .

If no DTC is stored:

• Check aging of Oxygen Sensor (O2S) before Three Way Catalytic Converter (TWC) → Heated Oxygen Sensor (HO2S), checking aging .

If "B1 P1 OK." appears in display zone 4:

• Press C button.

Work step 8: Fuel supply system diagnosis (part load) 

Indicated on display:

Basic setting Input display group number XXX

• Press buttons 2, 1 and 6 for "Display group number 216" and confirm entry with Q button.

Indicated on display: (1 to 4 = display zones)

System in basic setting 216 → 1 2 3 4

• Depress brake pedal and hold.
• Depress accelerator down to wide open throttle position.

Engine speed will be increased by Motronic Engine Control Module (ECM) J220 to approx. 2300 rpm.

• Depress brake pedal and accelerator down until display zone 4 displays (after approx. 75 seconds) specification "xxxxx100".
• Release brake and accelerator pedals.

If the display does not indicate as described:

• Press → button.
• Check DTC memory, repair Diagnostic Trouble Codes (DTCs) if necessary and then erase DTC memory → DTC memory, checking and erasing  , DTC memory, checking and erasing.
• Read readiness code → Read readiness code  . If the DTC memory has been erased, the readiness code must be generated again → Generating readiness code  .

If the display indicates as described:

• Press → button.

Work step 9: Oxygen Sensor (O2S) control diagnosis status after Three Way Catalytic Converter (TWC) 

Indicated on display:

Rapid data transfer HELP Select function XX

• Press buttons 0 and 8 for function "Read measured value (data) block" and confirm entry with Q button.

Indicated on display:

Read measured value block Input display group number XXX

• Press buttons 0, 3 and 0 for "Display group number 30" and confirm entry with Q button.

Indicated on display: (1...2 = display zones)

Read measured value block 30 → 1 2

• Check Oxygen Sensor (O2S) control status after Three Way Catalytic Converter (TWC) (display zone 2): Specification: 111

Significance of figures in 3 digit number block Significance of characters in 3 digit number block, display zones 1 and 2 - Status of Oxygen Sensor (O2S) control before and after Three Way Catalytic Converter (TWC)  .

If the specification is not obtained:

• Press → button.
• Check Oxygen Sensor (O2S) heater of Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) → Oxygen Sensor (O2S) heating for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130, checking .

If the specification is obtained:

• Press → button.

Work step 10: Oxygen Sensor (O2S) aging diagnosis of Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) 

Indicated on display:

Rapid data transfer HELP Select function XX

• Press buttons 0 and 4 for function "Initiate basic setting" and confirm entry with Q button.

Indicated on display:

Basic setting Input display group number XXX

• Press buttons 0, 4 and 3 for "Display group number 43" and confirm entry with Q button.

Indicated on display: (1 to 4 = display zones)

System in basic setting 43 → 1 2 3 4

• Depress brake pedal and hold.
• Depress accelerator down to wide open throttle position.

Engine speed will be increased by Motronic Engine Control Module (ECM) J220 to approx. 2300 rpm.

• Depress and hold brake pedal and accelerator until display in display zone 4 jumps from "Test OFF" to "Test ON", when performing this test the Three Way Catalytic Converter (TWC) temperature in display zone 2 must be at least 380 ° C.

• Depress and hold brake pedal and accelerator until display zone 4 displays specification "B1 P2 OK.".
• Release brake and accelerator pedals.

If "B1 P2 n.OK." appears in display zone 4:

• Press → button.
• Check DTC memory, repair Diagnostic Trouble Codes (DTCs) if necessary and then erase DTC memory → DTC memory, checking and erasing  , DTC memory, checking and erasing.
• Read readiness code → Read readiness code  . If the DTC memory has been erased, the readiness code must be generated again → Generating readiness code  .

If no DTC is stored:

• Check aging of Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) → Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130, checking aging .

If "B1 P2 OK." appears in display zone 4:

• Press C button.

Work step 11: Oxygen Sensor (O2S) diagnosis after Three Way Catalytic Converter (TWC) (operational readiness) 

Indicated on display:

Basic setting Input display group number XXX

• Press buttons 0, 3 and 6 for "Display group number 36" and confirm entry with Q button.

Indicated on display: (1...2 = display zones)

System in basic setting 36 → 1 2

If the diagnosis is initiated by the Motronic Engine Control Module (ECM) J220 the display in display zone 2 jumps from "Test OFF" to "Test ON".

• Leave engine running at idle until display zone 2 shows specification "B1 P2 OK.".

If "B1 P2 n.OK." appears in display zone 4:

• Press → button.
• Check DTC memory, repair Diagnostic Trouble Codes (DTCs) if necessary and then erase DTC memory → DTC memory, checking and erasing  , DTC memory, checking and erasing.
• Read readiness code → Read readiness code  . If the DTC memory has been erased, the readiness code must be generated again → Generating readiness code  .

If no DTC is stored:

• Check Oxygen Sensor (O2S) and Oxygen Sensor (O2S) control after Three Way Catalytic Converter (TWC) → Oxygen Sensor (O2S) and Oxygen Sensor control after Three Way Catalytic Converter (TWC), checking

If "B1 P2 OK." appears in display zone 4:

• Press C button.

Work step 12: Three Way Catalytic Converter (TWC) diagnosis (checking conversion) 

Indicated on display:

Basic setting Input display group number XXX

• Press buttons 0, 4 and 6 for "Display group number 46" and confirm entry with Q button.

Indicated on display: (1 to 4 = display zones)

System in basic setting 46 → 1 2 3 4

• Depress brake pedal and hold.
• Depress accelerator down to wide open throttle position.

Engine speed will be increased by Motronic Engine Control Module (ECM) J220 to approx. 2300 rpm.

Only continue with the test when:

• The Three Way Catalytic Converter (TWC) temperature is above 380 ° C (display zone 2).

• Depress brake pedal and accelerator down and hold until display in display zone 4 jumps from "Test OFF" to "Test ON".

• Depress and hold brake pedal and accelerator until display zone 4 displays specification "Cat. B1 OK.".
• Release brake and accelerator pedals.

If "CatB1 n.OK." appears in display zone 4:

• Press → button.
• Check DTC memory, repair Diagnostic Trouble Codes (DTCs) if necessary and then erase DTC memory → DTC memory, checking and erasing  , DTC memory, checking and erasing.
• Read readiness code → Read readiness code  . If the DTC memory has been erased, the readiness code must be generated again → Generating readiness code  .

If no DTC is stored:

• Press buttons 0 and 6 for the function "End output" and confirm entry with the Q button.
• Switch off ignition.
• Replace front exhaust pipe with Three Way Catalytic Converter (TWC): → 26 - EXHAUST SYSTEM, EMISSION CONTROLS

If "Cat B1 OK." appears in display zone 4:

• Press C button.

Work step 13: Fuel supply system diagnosis (idle speed) 

Indicated on display:

Basic setting Input display group number XXX

• Press buttons 2, 1 and 6 for "Display group number 216" and confirm entry with Q button.

Indicated on display: (1...4 = display zones)

System in basic setting 216 → 1 2 3 4

• Observe figure displayed in display zone 4.

Specification: xxxxx100

• Allow engine to run at idle until display zone 4 displays (after approx. 30 seconds):

Specification: xxxx1100.

If the display does not indicate as described:

• Press → button.
• Check DTC memory, repair Diagnostic Trouble Codes (DTCs) if necessary and then erase DTC memory → DTC memory, checking and erasing  , DTC memory, checking and erasing.
• Read readiness code → Read readiness code  . If the DTC memory has been erased, the readiness code must be generated again → Generating readiness code  .

If the display indicates as described:

• Press C button.

Work step 14: Evaporative Emissions (EVAP) Canister system solenoid valve 1 diagnosis (Tank ventilation system) 

Indicated on display:

Basic setting Input display group number XXX

• Press buttons 0, 7 and 0 for "Display group number 70" and confirm entry with Q button.

Indicated on display: (1 to 4 = display zones)

System in basic setting 70 → 1 2 3 4

If the diagnosis is initiated by the Motronic Engine Control Module (ECM) J220 the display in display zone 4 jumps from "Test OFF" to "Test ON".

• Leave engine running at idle until display zone 4 displays:

Specification: TBV OK..

If "TBV n. OK." appears in display zone 4:

• Press → button.
• Check DTC memory, repair Diagnostic Trouble Codes (DTCs) if necessary and then erase DTC memory → DTC memory, checking and erasing  , DTC memory, checking and erasing.
• Read readiness code → Read readiness code  . If the DTC memory has been erased, the readiness code must be generated again → Generating readiness code  .

If no DTC is stored:

• Press buttons 0 and 6 for the function "End output" and confirm entry with the Q button.
• Switch off ignition.
• Check breather lines to EVAP canister (may be kinked).
• Check EVAP canister system for leaks: → 20 - FUEL SUPPLY

If "TBV OK." appears in display zone 4:

• Press C button.

Work step 15: Secondary air system diagnosis 

Indicated on display:

Basic setting Input display group number XXX

• Press buttons -0, - 7  - and - 7  - for "Display group number 77" and confirm entry with Q button.

Indicated on display: (1 to 4 = display zones)

System in basic setting 77 → 1 2 3 4

If the diagnosis is initiated by the Motronic Engine Control Module (ECM) J220 the display in display zone 4 jumps from "Test OFF" to "Test ON".

• Leave engine running at idle until display zone 4 displays:

Specification: "Syst. OK."

If "Syst.n.OK." appears in display zone 4:

• Press → button.
• Check DTC memory, repair Diagnostic Trouble Codes (DTCs) if necessary and then erase DTC memory → DTC memory, checking and erasing  , DTC memory, checking and erasing.
• Read readiness code → Read readiness code  . If the DTC memory has been erased, the readiness code must be generated again → Generating readiness code  .

If no DTC is stored:

• Press buttons 0 and 6 for function "End output" and confirm entry with Q button.
• Switch off ignition.
• Check combi-valve: → 26 - EXHAUST SYSTEM, EMISSION CONTROLS

If "Syst. OK." appears in display zone 4:

• Press → button.

Work step 16: Read readiness code 

• Read readiness code → Read readiness code  .