Montero Sport XS 2WD V6-3.5L SOHC (2001)
Oxygen Sensor: Testing and Inspection
OXYGEN SENSOR CHECK
Required Special Tools:
MB991316: Test Harness Set
MD998464: Test Harness
<Left bank heated oxygen sensor (front)>
1. Using scan tool MB991502, observe HO(2)S reading. If values are satisfactory, or if a scan tool is not available, use the following procedure:
1. Disconnect the heated oxygen sensor connector and connect special tool MB991316 to the connector on the heated oxygen sensor side.
2. Make sure that there is continuity [4.5 - 8.0 Ohms at 20 °C (68 °F)] between terminal 1 (red clip of special tool) and terminal 3 (blue clip of
special tool) on the heated oxygen sensor connector
3. If there is no continuity, replace the heated oxygen sensor.
4. Warm up the engine until engine coolant is 80 °C (176 °F) or higher.
CAUTION: Be very careful when connecting the jumper wires; incorrect connection can damage the heated oxygen sensor.
5. Use the jumper wires to connect terminal 1 (red clip) of the heated oxygen sensor connector to the positive battery terminal and terminal 3
(blue clip) to the negative battery terminal.
6. Connect a digital voltage meter between terminal 2 (black clip) and terminal 4 (white clip).
Standard Value
