OXYGEN SENSOR FEEDBACK VOLTAGE TEST
Oxygen sensor feedback voltage test is not available. If problem exists with oxygen sensor, diagnostic trouble code will be stored in Engine Control Module (ECM). For trouble code diagnosis, see the TESTS W/CODES - 3.4L article.
Note. Diagnostic trouble Codes 21, 25, 26, 27 and 28 (some models) are oxygen sensor circuit codes. For diagnostic trouble code charts, see the TESTS W/CODES - 3.4L article.
| Application Type | Main Oxygen Sensor | Sub-Oxygen Sensor | Sensor Heater |
|---|---|---|---|
| T100 | (1) X | N/A | (2) X |
| (1) One on exhaust pipe in front of catalytic converter and one on exhaust pipe behind catalytic converter. (2) Heater used on main oxygen sensor. | |||
| (1) | One on exhaust pipe in front of catalytic converter and one on exhaust pipe behind catalytic converter. |
| (2) | Heater used on main oxygen sensor. |
OXYGEN SENSOR APPLICATION
EXHAUST GAS RECIRCULATION (EGR) SYSTEM TEST
Note. EGR systems contain different components depending on application. (Схема №25) When testing EGR system and components, use proper illustration to determine component location.
Note. When performing EGR system test, it will be necessary to monitor engine RPM by using tachometer or scan tester depending on model application. For tachometer or scan tester connections, see IDLE SPEED & MIXTURE in the ADJUSTMENTS - 3.4L article.