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Home >> Volkswagen >> 2001 >> Jetta GLS Wagon (1J6) V6-2.8L (AFP) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Oxygen Sensor and O2 Sensor Control Before TWC, Checking >> With Manufacturer's Scan Tool >> Aging Check

Aging Check




Oxygen Sensor 1 Aging, Checking

Special tools and equipment
- VAG1551 Scan Tool (ST) or VAG1552 mobile scan tool with VAG1551/3 adapter cable
- VAG1788/10 engine speed adjuster

Test conditions
- Coolant temperature at least 85 °C display group 04, display field 3

Functional check
- Connect VAG1551 (VAG1552) Scan Tool (ST).
- Switch ignition on and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (when doing this engine must be running at idle).

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input.

Indicated on display


Basic setting
Input display group number XXX


- Press buttons -0-, -3-, and -4- to input display group number 34 (034) and press -Q- button to confirm input.

Indicated on display: (1-4 = display fields)


System in basic setting 34 ->
1 2 3 4


- Depress brake pedal and hold.


NOTE: Engine speed will be increased by the Engine Control Module (ECM).


- Check specified values in display fields 1-4.

If the diagnostic is initiated from the
Engine Control Module (ECM), the display in display field 4 changes from "Test OFF" to "Test ON."


Display Group 034:






If the specified values are obtained:
- Release brake pedal.
- Press -> button.
- Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
- Switch ignition off.

Continuation
If the specified values are not obtained:
- Carry out road test to free oxygen sensor of possible residues and repeat test.
Observe the safety precautions when carrying out a road test. Refer under "Fuel Delivery and Air Induction", Service Precautions

If the specified values are still not obtained:
- Replace Heated Oxygen Sensor (HO2S) -G39- before Three Way Catalytic Converter (TWC), item 30. Refer under "Fuel Delivery and Air Induction/Fuel Injector", Service and Repair
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
- Display readiness code.

If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, the readiness code must be generated again.
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