Jetta Sedan L5-2.5L (CBTA) (2009)
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to --> [ Diagnostic Mode 03 - Read DTC Memory ] See: Testing and Inspection/Scan Tool Testing and
Procedures/Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Diagnostic Mode 04 - Erase DTC Memory.
3. If the DTC memory was erased, generate readiness code. Refer to --> [ Readiness Code ] See: Testing and Inspection/Monitors, Trips, Drive
Cycles and Readiness Codes.
Oxygen Sensor O2S 1 In Center Three Way Catalytic Converter, Checking
Oxygen Sensor O2S 1 in center Three Way Catalytic Converter, Checking
‹› Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Oxygen Sensor (O2S) 2 in center Three Way
Catalytic Converter (TWC) (G465).
Special tools, testers and auxiliary items required
‹› multimeter.
‹› Wiring diagram.
Test requirements
‹› Fuse 15 in Fuse Box B is OK.
‹› Engine Control Module (ECM) (J623) fuses OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check.
Start diagnosis
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Perform the function test in Diagnostic Mode 06. Refer to --> [ Diagnostic Mode 06 - Read Test Results for Specific Diagnostic Functions ] See:
Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 06 - Read Test Results For Specific Diagnostic Functions.
If specified values are obtained:
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Check for possible intermittant connection or rub through of harness.
If the specified values are not obtained:
Checking primary voltage
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Disconnect the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G465) electrical harness connector.