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mass air flow sensor wiring question

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Old Sep 8, 2008 | 01:28 PM
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Default mass air flow sensor wiring question

I have an aftermarket 85mm MAS sensor from SLP Performance parts.

It has three wires - black/grey; yellow, red.

I know that one wire is ground, one is + voltage and one is signal.

Would like to know which is which and is the +voltage 12V or 5V?

Thanks in advance for any help. I cannot find any information on this.
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Old Sep 8, 2008 | 02:12 PM
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Originally Posted by hacksawjones
I have an aftermarket 85mm MAS sensor from SLP Performance parts.

It has three wires - black/grey; yellow, red.

I know that one wire is ground, one is + voltage and one is signal.

Would like to know which is which and is the +voltage 12V or 5V?

Thanks in advance for any help. I cannot find any information on this.
Since your sig is devoid of any info, I can only assume that you have a 2000 or older C5 that uses the three wire MAF. If this is the case, they are as follows:

Pin A: Yellow wire-signal
Pin B: Black/White wire-Ground
Pin C: Pink Wire- Ignition voltage

All this info is available in the engine controls section of the service manual.
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Old Sep 8, 2008 | 06:02 PM
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Originally Posted by lucky131969
Since your sig is devoid of any info, I can only assume that you have a 2000 or older C5 that uses the three wire MAF. If this is the case, they are as follows:

Pin A: Yellow wire-signal
Pin B: Black/White wire-Ground
Pin C: Pink Wire- Ignition voltage

All this info is available in the engine controls section of the service manual.
Thakns for the reply. That was my first post.

It is a 3 wire sensor and does have yellow, blk/wht and pink.

Actually this MAF is not going on a car. Its being used on a piece of test equiipment with a fan and I need to measure flow but did not know how to hook it up.

Ignition voltage being 12V? Is there a chance it could be 5V DC?

Thanks again.
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Old Sep 8, 2008 | 06:37 PM
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From: Dyer, IN
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Originally Posted by hacksawjones
Thakns for the reply. That was my first post.

It is a 3 wire sensor and does have yellow, blk/wht and pink.

Actually this MAF is not going on a car. Its being used on a piece of test equiipment with a fan and I need to measure flow but did not know how to hook it up.

Ignition voltage being 12V? Is there a chance it could be 5V DC?

Thanks again.
Yes, the ignition voltage is 12volts(input to the MAF), the 5 volts is output from the MAF to the PCM.
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Old Sep 8, 2008 | 09:24 PM
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Thanks very much for your help with this.
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