6 V6-3.0L DOHC (2003)
Oxygen Sensor: Testing and Inspection
Heated Oxygen Sensor (HO2S) Inspection
HEATED OXYGEN SENSOR (HO2S) INSPECTION
NOTE: Perform the following inspection only when directed
Voltage Inspection
1. Warm-up the engine and run it at idle.
2. Disconnect the HO2S connector.
3. Connect the voltmeter test leads to the following HO2S terminals:
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(+) lead-terminal A
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(-) lead-terminal B
4. Run the engine at 3,000 rpm until the voltmeter moves between approx. 0 and 1.0 V.
5. Verify that the measurement voltage changes when the engine speed increases and decreases suddenly several times.
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If the HO2S is okay, but the PID value is out of specification, perform the "Circuit Open/Short Inspection".
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If not as specified, replace the HO2S. (See EXHAUST SYSTEM REMOVAL/INSTALLATION.)
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
