Anyone have a 97 4.0l OHV PCM pinout? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 08-23-2013
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Anyone have a 97 4.0l OHV PCM pinout?

If anyone has the pinout for a 97 OHV 4.0l I need to see a picture of the pinout for the PCM
More specifically I am looking for what pin(s) are for the purge flow sensor.

Any help is appreciated explorers of my year don't have this sensor and Im running a ranger computer for my set up so I need to wire in a sensor or take another approach and I'm trying to avoid reprogramming my PCM as that gets pricey.
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Old 08-26-2013
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the DPFE sensor?

That is BR/LG pin 65 off of the PCM
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Old 08-26-2013
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Maybe you mean the canister vent solenoid for the fuel system?

that is Pink/White wire pin 67

btw I am assuming this is for a 1997 Ford Explorer with the 4.0 OHV engine.
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Old 08-27-2013
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Thanks for the replies.
I do have an Explorer but I'm running a Ranger pcm since I swapped a manual and that's what I could get my hands on. It has a different emissions setup. Basically the explorer doesn't have a thermistor (purge flow sensor )
So I was hoping for the PIN number(s) for the purge flow circuit. I saw on another site it was pin 11 that gets the reading from the resistor but I don't have a wire there. it's a p1445 code.
I'm looking for a lower cost option than getting a tune to get rid of the MIL I don't really care to have the gains a tune will get me. Just trying to find a cheap solution without hopefully having to do too much more work.

I double checked with my explorer pcm and it reads no emissions codes only the trans codes so the issue lies in the ranger pcm looking for the signal from the thermistor (purge flow sensor).

Last edited by moneypit; 08-27-2013 at 08:41 PM.
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Old 08-27-2013
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What engine hardness are you using? Explorer? 97?


The Ranger PCM is indeed pin 11 BK/LG for the purge flow sensor. You may have to add a pin?
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Old 08-27-2013
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hope this helps.

97 explorer pcm



97 ranger pcm

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Anyone have a 97 4.0l OHV PCM pinout?-97-explorer-pcm.png   Anyone have a 97 4.0l OHV PCM pinout?-97-ranger-pcm.png  
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Old 08-28-2013
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I appreciate it. That's the info I was looking for. I probably will have to add a pin. All i did was re wire the 97 harness to get everything working proper on that end. I didnt account for the extra emissions sensor.

Do you think I could add the sensor fairly easily? wiring and all?
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Old 08-28-2013
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Well I was posting a nice long reply on here but the token expired... Thanks to Zabeards help I fixed my problem by installing a purge flow sensor.

I also had some help from here (about half way down) 1997 Ford Ranger Check Engine Light
to make sure I didn't burn my truck or its pcm to a crisp. It's a very good reference for a p1443 code.

Wired a hot lead to the vehicle power out of pin 97 with an inline connector and a ground lead to a chassis ground inline with the pcm harness.
I found a pin I had from a scrap harness laying around and I plugged it into pin 11 for the sensor and attached it to the signal lead for the sensor plug I made from a modified old o2 plug connector .

Cut the flow line between my purge solenoid and the throttle body and clamped the sensor in place and plugged everything back in. I'd post pictures but your trucks already have the sensor so you know what it is. Just wanted to say thanks and give news of the happy ending. giggity
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