Test sequence
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- 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".
NOTE:
- This process can take approx. 80 seconds.
- 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, -.