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Passat Sedan V6-3.6L (BLV) (2008)

Sensors and Switches > Sensors and Switches - Powertrain Management > Sensors and Switches - Computers and Control Systems > Oxygen Sensor > Component Information > Testing and Inspection > HO2S Front Oxygen Sensor Bank 1 Sensor 1, Checking > Page 964

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Oxygen Sensor Heater Bank 2 Sensor 1, Checking

‹› Oxygen Sensor Heater Bank 2 Sensor 1 (Z28) is part of HO2S Oxygen Sensor Bank 2 Sensor 1 (G108) and cannot be serviced separately.

‹› When servicing terminals in the electrical harness connector of HO2S Oxygen Sensor Bank 2 Sensor 1 (G108), use only gold-plated terminals.

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› Wiring diagram.

Test requirements

‹› Fuse (SB 33) fuse 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 connections between engine/transmission/chassis OK.

‹› Ignition switched off.

‹› The voltage for the Oxygen Sensor Heater Bank 2 Sensor 1 (Z28) is supplied by the Motronic Engine Control Module (ECM) Power Supply Relay

2 (J670).

Test procedure

-

Observe safety precautions. Refer to => [ Safety Precautions ] See: Powertrain Management/Computers and Control Systems/Service
Precautions/Safety Precautions

-

Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Powertrain Management/Computers and Control
Systems/Service Precautions/Clean Working Conditions

-

Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check.

Start diagnosis

-

Disconnect the HO2S Oxygen Sensor Bank 2 Sensor 1 (G108) electrical harness connector- 4 -.

Sensors and Switches > Sensors and Switches - Powertrain Management > Sensors and Switches - Computers and Control Systems > Oxygen Sensor > Component Information > Testing and Inspection > HO2S Front Oxygen Sensor Bank 1 Sensor 1, Checking > Page 964

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