Jetta GLS Wagon L4-2.0L (AZG) (2002)
-
Erase DTC memory to put learned values in a neutral setting
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading
Diagnostic Trouble Codes
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Clearing
Diagnostic Trouble Codes
With Manufacturer's Scan Tool
Oxygen Sensor and Oxygen Sensor Control Before Catalyst, Checking
NOTE:
-
Raise vehicle to reach Oxygen sensor connector.
-
The Oxygen sensor (before catalyst) has constant regulation and can be distinguished by a 6-pin connector from the Oxygen sensor after catalyst.
-
Only gold contacts may be used for servicing the contacts in the connector for the Oxygen sensor.
Special tools and equipment
-
V.A.G 1551 scan tool or 1552 scan tool with cable VAG1551/3
-
Test box VAG1598/31
-
Hand multimeter VAG 1526 or multimeter VAG 1715
-
Adapter set VAG 1594
-
Wiring diagram
Check conditions
-
All fuses must be OK.
-
The battery voltage must be at least 11.5 V.
-
Exhaust system between catalyst and cylinder head must be free of leaks
-
Coolant temperature must be at least 80 °C, See display group 04, display zone 3.
Functional check
-
Connect V.A.G 1551 scan tool ((VAG 1552). Start engine and select "Address word" 01 of engine control module. Engine must be running at
idling speed. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble
Codes/Scan Tool Connecting
Indicated on display:
Rapid data transfer
HELP
Self function XX
-
Press keys 0 and 8 for the function "Read measuring value block" and confirm entry with Q key.
Indicated on display:
Read measuring value block
Input display group number XXX
-
Press keys 0, 3 and 0 for the "Display group number 30" and confirm entry with Q key.