Montero SR 4WD V6-3.5L SOHC (1997)
STEP 2. Check for an open-circuit, or a short-circuit to ground, between the engine control module and the heated oxygen sensor.
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Heated oxygen sensor connector: Disconnected
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Engine control module connector: Disconnected
OK: GO TO STEP 3
NG: Repair the harness. (A4 - 79, B4 - 76, C4 - 73, D4 - 75)
STEP 3. Check for an open-circuit, or a short-circuit to ground, between the engine control module and the heated oxygen sensor.
-
Heated oxygen sensor connector: Disconnected
-
Engine control module connector: Disconnected
OK: GO TO STEP 4
NG: Repair the harness. (A3 - 42, 63 - 34, C3 - 43, D3 - 35)
STEP 4. Check for continuity of the ground circuit.
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Heated oxygen sensor connector: Disconnected
OK: STOP
NG: Repair the harness. (A2, 62, C2, D2 - 92)
HEATED OXYGEN SENSOR CHECK
<Heated oxygen sensor (front)>
(1) Disconnect the connector to the heated oxygen sensor, then use the special tool (test harness) to make connections with the connection on the
heated oxygen sensor side.
(2) Check that there is continuity between terminal (1) (red clip of the special tool) and terminal (3) (blue clip) of the heated oxygen sensor
connector [approx. 12 Ohm at a temperature of 20°C (68°F)].
(3) It there is no continuity, replace the heated oxygen sensor.