2012 Azure Transit Connect P0B3F-F1 Hybrid Battery Voltage Sense A Circuit Intermitte

Technical discussion on converting internal combustion to electric
Post Reply
okashira
Noobie
Posts: 2
Joined: Tue, 14 Nov 2017, 07:16

2012 Azure Transit Connect P0B3F-F1 Hybrid Battery Voltage Sense A Circuit Intermitte

Post by okashira » Tue, 14 Nov 2017, 07:18

Hi guys, first post here.

I have a 2012 AZD transit connect with only 82 miles on the clock.
When I got it, it did not run or charge, and I found two cells at 0v.
I replaced one of the cells, and the other cell charged up and holds a charge fine.

Btw, I made the replacement cell out of 21 18650 cells in parallel from a 2016 Model S ;-)
pics: https://1drv.ms/f/s!AuqwBZb5n5Jqgu1KRHYx_pEuam5Vuw


Anyway, after fixing everything else and putting the pack back together I got the van so it can drive, ac works, etc.
But pack 2 is throwing errors and wont come online. So the van runs in limp mode and won't charge.

Here are the codes:
-----ESS Pack 2 Info Codes-----
P0AFC-49 Hybrid Battery Pack Sensor Module
P0B3F-F1 Hybrid Battery Voltage Sense A Circuit Intermittent / Erratic


-----VCU DTC-----
P1A28 Battery Control Module "B" Critical Fault (same as P1A20)
P1A8B HV Discharger Status Circuit High


Anyone have any parts or insight?

okashira
Noobie
Posts: 2
Joined: Tue, 14 Nov 2017, 07:16

Re: 2012 Azure Transit Connect P0B3F-F1 Hybrid Battery Voltage Sense A Circuit Intermitte

Post by okashira » Tue, 14 Nov 2017, 12:35

After another 4 hours of experimenting and diagnosis Ive narrowed it down to one bad BMS module board.
Image

It looks grungy because ive been trying to clean off the conformal coating.

It has two AD7280 BMS chips
and a 32 bit NEC micro controller

The van has a total of 16 of these boards, only one is bad and giving the voltage sense code.

Does anyone know anyone who might have some of these boards?

Post Reply