CSP-23B70 Certain 2022-23 F-150 Lightnings - BMS Sensor Replacement

[Lytning]

According to this website, that 4th character in the prefix is the Design Responsibility Code:
T Heavy Truck Engineering
Z Ford Customer Service Division (Ford), Product Analysis and Publications

Edit: It is interesting that the basic part number (the piece in the middle) says 10C659 on the box but 10C652 on the part. I only glanced at the box my mobile tech had and just saw the -B. Didn't notice the other bits. But it is a later revision as evidenced by the suffix and the SW version.

I am beginning to understand why their software does not work. Ford can't even put the same number on the part and the box for the part.

Imagine how confusing this must be for the dealership Techs and Parts Department. They open a box with part number ML3Z-10C679-B printed on it and pull out a part with number ML3T-10C652-BA printed on it.

Do they have this same problem on the assembly line? What could possibly go wrong?

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[Lytning]

I've been idling the truck for ~5 hours now, the LVB SOC is at 84%
Ignition status Run
Lights & E-Heat off
Cabin HVAC fan set to 7

You may be on to something here. Do you have to "restart" the vehicle periodically to keep it in Run mode?

 

[bmwhitetx]

You may be on to something here. Do you have to "restart" the vehicle periodically to keep it in Run mode?

Settings > Vehicle > Power Down Timer > Slide off. Works for that session and resets next cycle.

 

[Jim Lewis]

Cabin HVAC fan set to 7

I think fan speed 3 is a bit breezy/noisy with all air routed through the dash louvers. I'll have to buckle up and try 7 and higher!

I didn't read the details for the "fan method" of charging the LVB, but when I'm charging the LVB in Accessory Mode with the truck plugged in, I turn off all accessories and my LVB seems to charge at a reasonable, slow rate (about 1 A or less for the charger current draw above 80% SOC), which you'd presumably want as you approach 100% SOC. I'll have to read up on why fan speed matters.

 

[TaxmanHog]

I think fan speed 3 is a bit breezy/noisy with all air routed through the dash louvers. I'll have to buckle up and try 7 and higher!

I didn't read the details for the "fan method" of charging the LVB, but when I'm charging the LVB in Accessory Mode with the truck plugged in, I turn off all accessories and my LVB seems to charge at a reasonable, slow rate (about 1 A or less for the charger current draw above 80% SOC), which you'd presumably want as you approach 100% SOC. I'll have to read up on why fan speed matters.

It is parked in my chilly garage while I'm in my comfortably warm house

I'm following @rugedraw advice a while back, turn off most 12V loads with exception to the HVAC Fan, the Mach-e reference materials suggest 5+ fan speed, so I went to 7, this was all while not plugged into the EVSE, so I am only running on the HVB energy not wanting to waste PTC energy.

At 6:15 pm I put the HVAC mode back to auto, lights auto, shut down the truck and plugged into the EVSE, I'm pumping up the HVB to 95% tonight for an expected heavy wind and rain storm midnight to 8:00 am.

The past 45 minutes the LVB has jumped quickly to 92%

 

[TaxmanHog]

You may be on to something here. Do you have to "restart" the vehicle periodically to keep it in Run mode?

Settings > Vehicle > Power Down Timer > Slide off. Works for that session and resets next cycle.

Exactly, I switched off the 30 minute automatic shutdown timer.

 

[rugedraw]

I am beginning to understand why their software does not work. Ford can't even put the same number on the part and the box for the part.

Imagine how confusing this must be for the dealership Techs and Parts Department. They open a box with part number ML3Z-10C679-B printed on it and pull out a part with number ML3T-10C652-BA printed on it.

Do they have this same problem on the assembly line? What could possibly go wrong?

When I converted the rear bumper of my truck to the Tremor bumper to accommodate a dual exhaust, the dealer ordered the left and right bumper end caps. Both boxes had two different part numbers, and the parts themselves had a sticker with two different part numbers.

They sent me two left side end caps even though one was labeled as it was supposed to be for the right side.

 

[bmwhitetx]

I didn't read the details for the "fan method" of charging the LVB, but when I'm charging the LVB in Accessory Mode with the truck plugged in, I turn off all accessories and my LVB seems to charge at a reasonable, slow rate (about 1 A or less for the charger current draw above 80% SOC), which you'd presumably want as you approach 100% SOC. I'll have to read up on why fan speed matters.

IIRC, the DC-DC converter can charge the battery at either 13.7V or 14.4V (may be off on a couple of digits). With a high system load (fan at 5 or above), the 14.4V kicks in and supposedly charges faster. In Car scanner you can observe all this. I have tried several methods. The thing about the fast blower is it does cause the DC-DC to output more volts but you are using/wasting a lot of energy on the fan. Lately I just put in RUN with everything off. A guy in the Mach-E forum explains all the different methods. He also has a good 12V battery FAQ.

 

[TaxmanHog]

My HVB just reached 95% 1 hour 24 minutes to add 16%
My LVB reached 93%

 

[F150ROD]

Had recall completed, all settings are still intact.

I notice for the Sync 4 recall, there was nothing they did as the paperwork said there was no need to update per instructions.

 

[Jim Lewis]

Here's what my CarScanner Pro screens look like when charging the LVB in Accessory Mode with the truck plugged into my FCSP. I'm using @Capstone's 8/7/22 CarScanner template https://www.f150lightningforum.com/...e-charging-battery-and-range-telemetry.11602/). It works great with an OBDLink CX dongle. All accessories are off, headlights and running lights off, etc.

Something interesting. Charging via Accessory Mode Plugged In seems to stop at 93% LVB SOC. Wonder if that has something to do with my BSM (which hasn't been replaced yet) and also relates to why I can't charge the LVB over 80% with a battery tender. See the last two images in this post.

Screen Showing 1 A Current Draw (@88% LVB SOC, see next pic)

Screen Showing ECU Voltage, LVB Voltage, LVC % SOC.

Video Showing Truck Charging Port Behavior:

LVB % SOC After 26 Minutes Of Accessory Mode Plugged In Charging (93%)
- 4 to 5% increase

CarScanner Screen Showing Charging Current ZERO When LVB 93% SOC.

 

[derm]

called the dealer last Wednesday and they are coming to my house to replace Monday... woot woot

 

[derm]

I got a notification this morning to schedule service for this issue. Have to wait 2 1/2 weeks.

Does this issue prevent me from getting OTA updates? So far I haven’t received any OTA Updates and I’ve had the truck 6 months.

I have been told. yes. got my truck July 1st and have never received an update.

 

[TaxmanHog]

LVB SOC has been maintained better since the new part install.

This is from early this morning before I refreshed the truck at 07:12

Then remote started the truck at 07:30 to begin a 30 minute warm up grid energy draw test.
LVB at 07:42

LVB at 07:50

LVB at 07:55

LVB at 10:00 after a short round of errands of 3 key cycles.

If I drive a longer period of time or a long charging session this will get higher into 80 & 90"s

 

[Lytning]

I am beginning to understand why their software does not work. Ford can't even put the same number on the part and the box for the part.

Imagine how confusing this must be for the dealership Techs and Parts Department. They open a box with part number ML3Z-10C679-B printed on it and pull out a part with number ML3T-10C652-BA printed on it.

Do they have this same problem on the assembly line? What could possibly go wrong?

I had the BMS and Dash Mat CSP's completed yesterday via Dealer Mobile Service. I must admit that it was an overall great experience. The Tech called about 20 minutes ahead of arrival and explained that he would be about 5 minutes late for the appointment. The Tech was knowledgeable, friendly and helpful. He answered all my questions and was not in a rush. He checked FDRS for any pending updates and said I was current at 6.5.

The different box (Ford "Service" part number) and part (Ford "Engineering" part number) numbers were the same as others have reported. I shared with the Tech that the CSP 23B70 document stated to install service part number ML3Z-10C679-B. I handed him the actual part with (Engineering) part number ML3T-10C652-BA printed on it, and asked him how he knew he was installing the correct part since the number on the part did not match the CSP document. He said he did not know, and that he just had to trust that the correct part was in the box.

Everything worked properly after the BMS replacement. I did have to manually lower the frunk lid since its known status was lost when the battery was disconnected.

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