Touareg V10-5.0L DSL Turbo (BKW) (2004)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor Heater, Checking
Diagnostic Procedures
Oxygen Sensor Heater, Checking
‹› Cylinder bank 1 is located in direction of travel, right.
‹› Cylinder bank 2 is located in direction of travel, left.
‹› Use only gold-plated terminals when servicing terminals in harness connector.
Special tools, testers and auxiliary items required
‹› Multimeter (VAG1526) or Multimeter (VAG1715)
‹› Connector test kit (VAG1594)
‹› Wiring diagram
Test Prerequisites
‹› Fuses in E-box (plenum chamber, left) must be OK:
‹› Power Supply Relay (Terminal 30, B+) Relay 2 (J689), must be OK, check:
‹› Battery voltage must be at least 11.5 volts.
‹› All electrical consumers such as, for example, lights and rear window defroster must be switched off.
‹› For vehicles with automatic transmission, selector lever must be in P.
‹› If vehicle is equipped with an A/C system, it must be switched off.
‹› Ground (GND) connections between engine and chassis must be OK.
‹› Coolant temperature must be at least 80 °C --> [ Diagnostic Mode 01 - Read Current System Data ] See: Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09.
‹› Ignition is switched off.
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Disconnect 6-pin harness connector - B - to Heated Oxygen Sensor (HO2S) (G39).