Test sequence

• Connect Scan Tool VAG 1551 or Vehicle system tester VAG1552/. Start engine and select "Address word" 01 of engine control module. → 01 ON BOARD DIAGNOSTIC (OBD)

Indicated on display

Rapid data transfer HELP Select function XX

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

Indicated on display

Basic setting Input display group number XXX

• Press keys "0" , "0" and "1" for "Display group number 1" and confirm entry with "Q" key.

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

System in basic setting 1 -> 1 2 3 4

Only continue with the test when:

• Coolant temperature is above 85 ° C - Display zone 2  -

• Change to display group 46 as follows:
• Press C key.

Indicated on display

Basic setting Input display group number XXX

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

Indicated on display: (1...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 engine control module to approx. 2300 rpm.

Only continue with the test when:

• Catalytic converter temperature is above 380 ° C - Display zone 2  -

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

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

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

• Press → key.
• Press keys "0" and "6" for function "End output" and confirm entry with "Q" key.
• Switch ignition off.

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

• Press → key.
• Check DTC memory: → 01 ON BOARD DIAGNOSTIC (OBD)
• Read readiness code: → 01 ON BOARD DIAGNOSTIC (OBD)
• Generate readiness code again if DTC memory has been erased or engine control module disconnected from permanent positive supply: → 01 ON BOARD DIAGNOSTIC (OBD)

If no DTC is stored in DTC memory:

• Press keys "0" and "6" for function "End output" and confirm entry with "Q" key.
• Switch ignition off.
• Replace front exhaust pipe with catalytic converter, -.