GLI L4-2.0L Turbo (BPY) (2008)
Oxygen Sensor: Testing and Inspection
Heated Oxygen Sensor, Checking
Heated Oxygen Sensor, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The Engine Component Power Supply Relay (J757) OK.
‹› Fuse (SB9) OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› 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: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check.
Function test
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Perform the function test in Diagnostic Mode 06 --> [ Diagnostic Mode 06 - Read Test Results for Specific Diagnostic Functions ] See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 06 - Read Test Results
For Specific Diagnostic Functions.
If the specified values are not obtained:
Start diagnosis
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Remove the engine cover with air filter.
If the specified values are not obtained:
Checking primary voltage
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Disconnect the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector - arrow -.