With Manufacturer's Scan Tool
Heated Oxygen Sensor (HO2S) aging, bank 1 sensor 1, checking
Special tools and equipment
- VAG 1788/10 RPM adjuster
- V.A.G 1551 Scan Tool (or VAG 1552) with VAG 1551/3 cable
Test condition
- Coolant temperature must be at least 85°C, See display group 04, display field 3
Function test
- Connect V.A.G 1551 scan tool (VAG 1552). Start engine and select Engine Control Module (ECM) using address word 01. Refer to Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting V.A.G 1551 Scan Tool [1][2][3]Connecting VAG 1551 Scan Tool
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -4- to select "Basic Setting" function 04. Press -Q- button to confirm input.
Indicated on display
Basic Setting
Input display group number XXX
- Press buttons -0-, -3- and -4- to select "Display group number 34". Press -Q- button to confirm input.
Indicated on display (1 - 4 = display fields)
System in Basic Setting 34 ->
1 2 3 4
- Use VAG 1788/10 RPM adjuster to adjust engine RPM to 1000-2400 RPM:
- Hold RPM until the catalytic converter temperature in display field 2 over 350°C climbs.
- Check specified values in display fields 1 - 4.
If diagnostic is initiated by the Engine Control Module (ECM), the indication in display field 4 will jump from "Test OFF" to "Test ON".
- Continue to hold the RPM at 1000 - 2400 until in display field 4 expected value "B1-S1 OK" is indicated.
If specified values are not obtained:
- Perform a road test to free Heated Oxygen Sensor (HO2S) of any possible residue, and repeat test.
Observe safety precautions which apply to road tests.
If specified values are not obtained again:
- Replace Heated Oxygen Sensor (HO2S) (G39), bank 1 before catalytic converter item 27.
- Check DTC memory, repair any malfunctions and then erase DTC memory. Refer to Displaying and Reading Trouble Codes/With Manufacturer Scan Tool/DTC Memory Checking and Erasing DTC Memory Checking and Erasing
- Read readiness code. If DTC memory was erased or Engine Control Module (ECM) was disconnected from B+ supply, readiness code must be re-generated. Monitors, Trips, Drive Cycles and Readiness Codes