CHECK POWER SUPPLY TO REAR OXYGEN SENSOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from rear oxygen sensor.

3) Turn the ignition switch to ON.

4) Measure the voltage between rear oxygen sensor connector and engine ground.

Connector & terminal

(E22) No. 2 (+) — Engine ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the power supply line.

NOTE:

In this case, repair the following item:

• Open circuit of harness between main relay and rear oxygen sensor

• Poor contact of the rear oxygen sensor

• Poor contact of main relay connector