Quest Minivan GXE V6-3.3L (VG33E) (2002)
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 50 [Heated oxygen sensor 1 (front) signal] and engine ground.
3. Check the following with engine speed held at 2,000 rpm constant under no load.
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The voltage fluctuates between 0 to 0.3 V and 0.6 to 1.0 V more than five times within 10 seconds.
1 time: 0 - 0.3 V -> 0.6 - 1.0 V -> 0 - 0.3 V
2 times: 0 - 0.3 V -> 0.6 - 1.0 V -> 0 - 0.3 V -> 0.6 - 1.0 V -> 0 - 0.3 V
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The maximum voltage is over 0.6 V at least one time.
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The minimum voltage is below 0.3 V at least one time.
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The voltage never exceeds 1.0 V
CAUTION:
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Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor;
use a new one.
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Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and
approved anti-seize lubricant.
HEATED OXYGEN SENSOR 1 HEATER (FRONT)
Check resistance between terminals 3 and 1.
Resistance: 2.3 - 4.3 Ohm at 25 °C (77 °F)
Check continuity between terminals 2 and 1, 3 and 2.
Continuity should not exist.
If NG, replace the heated oxygen sensor 1 (front).
CAUTION:
-
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor;
use a new one.
-
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and
approved anti-seize lubricant.
HEATED OXYGEN SENSOR 2 (REAR)
With CONSULT-II