Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Catalyst system efficiency below threshold

Toyota Corolla (E120): Catalyst system efficiency below threshold

Dtc p0420 catalyst system efficiency below threshold (bank 1)

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RSA (Road Sign Assist)
The RSA system detects specific road signs using the front camera and/or navigation system (when speed limit information is available) and warns the driver via displays and buzzers. WARNING ■For safe use Driving safely is solely the responsibility of the driver. Pay careful attention to the su ...

Inspection procedure
1 Inspect skid control ecu connector(+bs terminal voltage) Disconnect the skid control ecu connector.  measure the voltage between terminals +bs (2) and gnd (1, 23) of skid control ecu harness side connector. Voltage: 10 – 14 v 2 Reconfirm dtc Check the dtc . Ok : ...

Terminals of ecu
1. Inspect integration relay Disconnect the connector from the integration relay. check the continuity between each terminal of the disconnected connector and the body ground, as shown in the illustration and table. Standard: If the result is not as specified, the vehicle’s ...