| CHECK HARNESS BETWEEN ECM AND REAR OXYGEN SENSOR CONNECTOR. |
|
1) Connect the connector to ECM. 2) Turn the ignition switch to ON. 3) Measure the voltage between rear oxygen sensor connector and chassis ground. Connector & terminal (E22) No. 4 (+) — Chassis ground (−): |
| QUESTION | |
|
Is the voltage 0.2 — 0.5 V? | |
| Yes | No |
|
Replace the rear oxygen sensor. |
Repair the harness and connector. NOTE: In this case, repair the following item: • Open circuit in harness between ECM and rear oxygen sensor connector • Poor contact of ECM connector • Poor contact of coupling connector |
