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- Disconnect connector, and measure at sensor side.
- Resistance between heater power supply terminal and OHFL line terminal.
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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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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(s), or check and repair the harness of short circuit to earth, and open circuit in power supply line between oxygen sensor (front) connector and engine control relay connector.
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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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![](../../../buttons/03btn002.png)
Repair or replace the connector(s), or check and repair the harness of short circuit to earth, and open circuit in OHFL line between oxygen sensor (front) connector and engine-ECU connector.
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Q.
Is the check result normal?
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Repair the connector(s) or wiring harness.
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Q.
Is the check result normal?
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Repair the connector(s) or wiring harness.
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- Reconfirmation of diagnosis code.
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Q.
Is diagnosis code set?
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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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