Volkswagen Workshop Manuals
Passat Sedan V6-3.6L (BLV) (2008)
Powertrain Management > 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 2770
‹› 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
Observe safety precautions. Refer to => [ Safety Precautions ] See: Computers and Control Systems/Service Precautions/Safety Precautions
Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Computers and Control Systems/Service Precautions/Clean
Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems/Testing
Disconnect the HO2S Oxygen Sensor Bank 2 Sensor 1 (G108) electrical harness connector- 4 -.
Checking internal resistance
Using a multimeter, check the Oxygen Sensor Heater Bank 2 Sensor 1 (Z28) terminals 3 to 4 for resistance.
Specified value: 2.5 to 10.0 ohms (at approx. 20° C)
If the specification was not obtained:
Replace HO2S Oxygen Sensor Bank 2 Sensor 1 (G108). Refer to the Repair Information.
If the specification was obtained:
Checking voltage supply
Switch the ignition on.
Using a multimeter, check the Oxygen Sensor Heater Bank 2 Sensor 1 (Z28) electrical harness connector terminal to ground for voltage.
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