Aging Check

Oxygen Sensors Behind Catalytic Converter, Checking Aging

Special tools and equipment







- VAS 5051 with VAS 5051/1

Test requirements

- Engine coolant temperature at least 80 degree C, see display group 004, display zone 3.

Test sequence

- Connect testing and information system VAS 5051 and select vehicle system "01 -Engine electronics" in selection. Engine must be running at idling speed. Connecting VAS 5051 Scan Tool

Display on VAS 5051:







- Under -1- select diagnostic function "04 - Basic setting".

Display on VAS 5051:







1 - Enter display group.
- Enter "194" for "display group number 194" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS 5051:







- Activate basic setting by pressing -A- button.
- Press accelerator and brake pedal simultaneously, engine speed increases to approx. 2200 rpm.

Test conditions:
- Accelerator and brake pedal pressed simultaneously, engine runs at approx. 2200 rpm.
- Check specification in display zones -3- and -4-.

Display Group 194:

- Press <- button.

Continuation:

If specification in display zones -3- and -4-. is not obtained:
- Perform test drive to free oxygen sensors from any possible residues and repeat test.

If specification in display zones -3- and -4- is not obtained even after a test drive has been performed:
- Replace relevant oxygen sensor behind catalytic converter.