- #SNAP ON MODIS BATTERY VOLTAGE MANUAL#
- #SNAP ON MODIS BATTERY VOLTAGE FULL#
- #SNAP ON MODIS BATTERY VOLTAGE SOFTWARE#
When battery voltage is low, BMS may disable certain sub-systems like Auto Start-Stop, heated seats, or SYNC to conserve power. The (positive) starter cable runs through a sensor assembly (not visible) that appears to be similar to a magnetic induction clamp meter. A small two-wire harness exits the BCM (red/grey wires), presumably providing power and data.
#SNAP ON MODIS BATTERY VOLTAGE SOFTWARE#
The BCM has markings indicating hardware and software versions/dates.
Both negative and negative (to chassis) ground cables are bolted to the BCM via ring terminals. On the 2017 Ford F-150 (pictured below), the BCM is clamped directly to the negative battery post. So what is BMS? Battery Management System (BMS)įord Battery Management System (BMS) - also referred to by Ford as the Battery Control Module (BCM) - connects to the negative terminal of the battery and monitors current, voltage, and temperature. Why none of the techs assigned to my shop ticket know about BMS - who presumably replace batteries and troubleshoot other issues with the electrical systems - I'm not sure. Auto Start-Stop functioned as if nothing had ever been wrong. Once they did everything functioned properly, no replacement parts required. The condition still remained until the shop foreman was consulted and asked whether anyone had reset the BMS. another vehicle was found on the lot exhibiting the same behavior (which was not a reassuring assessment or solution).diagnosis that the electronic transmission fluid pump was bad (somehow not talking to the powertrain control module this ended up being a red herring and nothing ended up being replaced).passing Rotunda test (full charge + test in ~28 minutes).healthy battery check using handheld tester.The message remained.Īfter a few trips to the Ford dealer, a couple overnights, here's what the service department came up with: SYNC was content with the state of the battery and stayed on, but Auto Start-Stop was still not happy.
#SNAP ON MODIS BATTERY VOLTAGE FULL#
The NOCO was content with the state of the battery, reporting a full charge. I drove home and put the battery on a NOCO GENIUS5 tender for a few days for more information, read my practical review of the NOCO GENIUS line. The "Engine On due to Vehicle Charging" message remained. They started charging the battery using the Rotunda, but I wasn't able to wait for a complete charge. They also advised that if I didn't drive the vehicle every couple days, I should put it on a battery tender. They advised that Ford wouldn't replace a battery under warranty unless it failed "the Rotunda test" which would require 2-3 hours. They checked using a handheld tester and reported that the battery was healthy. If the battery was bad and not holding a charge, it could explain the message. Problem was, even after driving a few hours on the highway - more than enough time for the alternator to charge the battery completely - the condition would remain.ĭuring a routine oil change while the vehicle was under warranty, I asked the techs to check the battery. The three year old battery reported good voltage while the truck was running, indicating that the alternator was providing power.
#SNAP ON MODIS BATTERY VOLTAGE MANUAL#
The 2017 Fusion Owner's Manual has a thorough list with descriptions of each. Engine On due to Steering Wheel Maneuvering.There are many conditions that can cause Auto Start-Stop to be disabled, listed on page 173 of the Owner's Manual (PDF), and many of which with their own message that I've seen during the course of normal operation. This nagging message, some driveway troubleshooting, and a few visits to my dealer's service department led me to discover Ford's Battery Management System (BMS). At a full stop with foot firmly on the brake, I'd see an "Engine On due to Vehicle Charging" message on the dashboard display.
The Auto Start-Stop system on my 2017 Ford F-150 hadn't been working for a couple months. ℹ️ As an Amazon Associate I earn from qualifying purchases.