New PCM still have P0352 code

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Nov 5, 2022 | 06:03 PM

Bmitchell417

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New PCM still have P0352 code

Hello Everyone,

Brandon here and this is my first post. I have used the forum for years but just joined today.
1999 F350 Super Cab - 6.8 V10. Cold Air Intake, AirRaid TB Spacer, Leveling kit, run 315-75-R16
Purchased truck brand new - 265,000 miles - i have performed all minor and major repairs to the truck.

I have been chasing a P0352 code for months now. I was showing a P0358 also but corrected that with a new COP connector. The P0352 code has been driving me crazy. I have diagnosed with voltmeter and determined i was not getting the ground signal to the connector. I traced the entire wiring harness all the way through back to the PCM. At the PCM the Pink/Light blue wire form Pin #78 has no ground signal. After discovering this i researched the problem and purchased a new programmed plug and play PCM. I installed and i am still getting the P0352 code. Could this be my pin on the wiring harness? i still have no ground signal at the PCM. ( where pink/Light blue wire comes out of PCM harness).

Any thought would be appreciated.

Nov 6, 2022 | 07:49 AM

projectSHO89

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From: St Louis

Quote:

Could this be my pin on the wiring harness?

Certainly possible.

You have correctly identified the wire/circuit to be checked.

Have you verified that you have switched battery power at the PCM connector. If so, by what technique?
Have you verified continuity of the PK/LB wire all the way from the male pin of the PCM connector to the COP connector?
Verified that there is no short to power or ground on the same wire?
If the answer to either or both is "no", go check that first.

Nov 6, 2022 | 10:25 PM

Bmitchell417

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3rd Gear

Joined: Nov 2022

Posts: 3

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I did perform check on wire from all way from COP though intermediate Plug Housing and through to the PCM. I installed new PCM hooked wiring harness up and cranked truck. Fired Right up and then checked OBDII with scan tool. Immediately showed the 0352 code. I actually pulled coil, checked for spark, with no luck. I then located the Pnk/Bl wire from the #78 Pin and have no ground signal on harness side of the PCM.

I am thinking i have a bad/damaged wire inside the vehicle harness connector.

Thanks for your reply

Nov 7, 2022 | 06:23 AM

projectSHO89

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From: St Louis

Re-read my previous questions and answer them specifically and concisely. Don't simply repeat what you already said.

Nov 9, 2022 | 02:47 PM

Bmitchell417

Thread Starter

3rd Gear

Joined: Nov 2022

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so, it was the harness side pink/lt blue wire. It had backed out of the harness. i was able to push the wire back through connector into the proper location. secured with super glue .

drove for two days now, no codes .

just asking, how would you check the switched battery power at the PCM?

Nov 9, 2022 | 03:21 PM

projectSHO89

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Joined: Jan 2004

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From: St Louis

Well, the fasted and easiest to see if ht ePCM is getting switched power is to look at the check engine light when the ignition switch is turned to RUN. If it lights up, the PCM is getting its switched power and has a ground connection.

Glad you were able to find the problem and get it fixed!