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- Disconnect connector, and measure at sensor side.
- Resistance between terminal power supply line and engine-ECU OHFL line.
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OK: 4.5 - 8.0 Ω (at 20°C)
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Q.
Is the check result normal?
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Repair or replace the connector, or replace the oxygen sensor (front).
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- Disconnect connector, and measure at harness side.
- Ignition switch: "ON"
- Voltage between terminal power supply line and body earth.
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Q.
Is the check result normal?
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Repair or replace the connector, or check and repair harness between oxygen sensor (front) connector terminal and engine control relay connector terminal.
- Check power supply line for open/short circuit.
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- Disconnect connector, and measure at harness side.
- Ignition switch: "ON"
- Voltage between terminal OHFL and body earth.
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Q.
Is the check result normal?
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Repair or replace the connector, or check intermediate connector, and repair if necessary. If intermediate connector is normal, check and repair harness between oxygen sensor (front) connector terminal and engine-ECU connector terminal OHFL.
- Check earthing line for open/short circuit.
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- Check earthing line for damage.
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Q.
Is the check result normal?
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Repair or replace the connector, or repair the damaged harness wire.
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- Check power supply line for damage.
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Q.
Is the check result normal?
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Repair or replace the connector, or repair the damaged harness wire.
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- Reconfirmation of diagnosis code.
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Q.
Is diagnosis code stored?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
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