Service High Voltage Charging System - Out of warranty

quick into
As many getting this - the trigger may be

1. the Hot weather causing a false trigger of the sensor or harness that got added to 2011-2012 Volts

2. old 12 volt batteries

3. LOW coolant ( but most of us check that and that is NOT the reason)

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A. There is a service report on getting replacement NEW sensor and cable
BUT like many dealer items you must have the problem before that will install .


B. reports are that to just clear - you need to re-flash/program a module AND clear/reset some codes
not just clear codes

Links are in the other post but will link them here later.
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I plan to do 12 volt battery first as it is 7 years old and a dealer re-programming and code reset
then wait and see about sensor/cable.

https://static.nhtsa.gov/odi/tsbs/2013/SB-10052204-6977.pdf

Bulletin No.: PI0961A
Date: November, 2013


"Scan modules HPCM2 has codes. P1FFF and P0AA6 current.

Scan check data. Isolation resistance is ok, at 325k ohms.

Perform update on BECM and HPCM2 as per bulletin PIC5920.

Also replace Coolant level sensor for high voltage battery pack with updated unit for P1FFF.

Bulletin PI0961."

Found this on
https://sandyblogs.com/techlink/?p=8089


If a coolant leak is not observed, update the HPCM2 and BECM with the latest calibrations in TIS2Web. The revised calibrations are designed to improve the measurement accuracy of the internal loss of isolation DTC P0AA6. This is the more common repair for this DTC. The HPCM2 and the BECM work in conjunction to monitor and control the battery pack.



The BECM programming procedure is unique. It’s important to wait for service programming to fully complete with the checkered flag, as each of the four Battery Interface Control Modules (BICMs) are subsequently flashed once the status bar reaches 100%. Remain patient as this programming could take an additional ten minutes.



If DTC P1FFF does not clear after programming, attempt a secured high voltage code clear, as a function of the HPCM2.



The special labor operation listed in PIC5920G as well as normal programming updates for the HPCM2 and BECM are covered under the Voltec warranty period (8 years/100,000 miles, U.S., or 160,000 kilometers, Canada).