19-23 Electrical System Troubleshooting z Error code 01-5 (O 2 sensor open abnormality) Related portion A35 C1 Probable cause c O 2 Sensor defect d Harness defect e Engine controller defect Caution: When another error code is present, repair the related parts first before carrying out the following. Error code 01-5 Disconnect the battery negative terminal (for more than 10 seconds). Check the connection status of C1, disconnect C1 and perform a visual and contact pressure inspection of the connector.
Short circuit the service connector TC terminal with the E1 terminal, and after connecting C1 and the battery negative terminal (on a combination vehicle, switch the fuel changeover switch to gasoline), turn the ignition key switch ON (engine stopped), depress the accelerator pedal 5 times within 30 seconds (fully open to fully closed), then start the engine and check that the error has been cleared. Service connector Disconnect the battery negative terminal, disconnect TC terminal - E1 terminal, connect the battery negative terminal, start the engine, and check whether the error occurs after performing error confirmation drive mode (see 19-13).
No error Connector contact defect Error NG Inspection 1: Harness continuity and short circuit inspection Harness defect OK O 2 sensor defect If the error occurs even after replacing the O 2 sensor Engine controller defect Section 19 Engine controller AC2 20 (OX) 4 3 (OX) REC TAB 21 (E11) 7 4 (E1) O2 sensor C 21 (E11) E TAB 7 4 (E1) R