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2002 chevy envoy 4.2

autojoe
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4 years 3 months ago #53015 by autojoe

2002 chevy envoy 4.2 was created by autojoe

Cps is it 12 volt pull up circuit? Ty

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autojoe
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4 years 3 months ago #53025 by autojoe

Replied by autojoe on topic 2002 chevy envoy 4.2

I know pull up down. So you are saying there should be no voltage on signal wire from pcm? I don't know if there is a problem with the signal wire open or short so no voltage on signal wire. That's why I was asking from experience if someone knows if pull up or pull down. I heard people say if 12 volt feed then probably pull up. Want to make sure.

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Matt T
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4 years 3 months ago #53033 by Matt T

Replied by Matt T on topic 2002 chevy envoy 4.2

Appears to be a 2 wire AC output sensor rather than pull up or down DC. Looks like it has a bias voltage on the signal wire.going by the OE wiring diagram. Probably either 12V or 5V with the sensor unplugged and some greater than zero voltage plugged in.

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autojoe
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4 years 3 months ago #53035 by autojoe

Replied by autojoe on topic 2002 chevy envoy 4.2

This is a 3 wire hall effect 12 volt feed ground and signal. DC Square wave.

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autojoe
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4 years 3 months ago #53054 by autojoe

Replied by autojoe on topic 2002 chevy envoy 4.2

I know that stuff but may have a signal wire problem so need to know if pull up or down from someone with experience on this car. Have to check with test light and ohmmeter.

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