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My dealer is being told that this TSB applies to my SEL (problem posted elsewhere) so apparently the TSB is not necessarily Energi specific. ------------------------------------------------------------------------------------------------------------------------------------------- TSB 15-0089ENERGI – DISCHARGED 12 VOLT BATTERY FORD: 2013-2014 C-MAX This article supersedes TSB 14-0155 to update the vehicle model lines and Service Procedure. ISSUE: Some 2013-2014 C-MAX Energi vehicles may exhibit a concern with a discharged 12 volt battery. ACTION: Follow the Service Procedure steps to correct the condition. SERVICE PROCEDURE Disconnect the 12 volt battery. Refer to Workshop Manual (WSM), Section 414-01.Connect the Rotunda Midtronics GR1-190 or GRX-3590 Diagnostic Battery Charger to the vehicle’s battery terminal posts only. Battery cables must be removed and no other connections, such as body ground, can be in the circuit during testing. Select diagnostic fast charge. On GR1-190 only - select above 400 km (250 miles) or below 400 km (250 miles) based on vehicle mileage. Select battery type Lead Acid. Enter cold cranking amp (CCA) rating of 390 CCA. Did the battery pass the load test? Yes - allow battery to fully charge. After charging is complete, reconnect the 12 volt battery. Refer to WSM, Section 414-01. Proceed to Step 4. No - record the failure code. Replace the battery. Refer to WSM, Section 414-01. Make sure the 12 volt battery is fully charged. Using Integrated Diagnostic System (IDS) service tool, perform the battery monitoring system (BMS). Reset after the new battery is connected. Proceed to Step 4. Reprogram the powertrain control module (PCM), DC/DC converter (DCDC), instrument panel cluster (IPC), gateway module (GWM) and if equipped with the 4.2-inch display, the front control / display interface module (FCDIM) using IDS release 91.05 or higher. Make sure you are connected to the internet when entering module programming to guarantee you will receive the latest updates. Calibration files may also be obtained at www.motorcraftservice.com. Inspect vehicle communication module (VCM) and cables for any damage. Make sure scan tool connections are not interrupted during programming. Connect the VCM to the vehicle’s primary data link connector. Do not connect the VCM to the GWM data link connector (DLC). Turn off all accessories (radio, heated/cooled seats, headlamps, interior lamps, HVAC system) and close doors. Disconnect or depower any aftermarket accessories. Disable IDS scan tool sleep mode, screen saver and hibernation modes. Create all IDS sessions key on engine off (KOEO). Starting the vehicle before creating a session will cause errors within the programming inhale process. Connect a battery charger to the 12 volt battery. Was the vehicle built on or before 9/12/2013? Yes - replace the telematics control unit (TCU) module. Refer to WSM, Section 415-00. Proceed to Step 6. No - proceed to Step 6. Was the vehicle built on or before 6/3/2013? Yes - proceed to Step 7. No - proceed to Step 8. Inspect the wiring for damage or chafing in the rear liftgate area, driver door connector wire harness C339, and front passenger door connector wire harness C340 (Figures 1, 2, 3 and 4). Is damage or chafing present? Figure 1 - 15-0089 Figure 2 - 15-0089 Figure 3 - 15-0089 Figure 4 - 15-0089 Yes - repair the circuits as needed. Refer to Wiring Diagram (WD), Section 5-1. After repair, wrap the affected area with 3M™ Temflex™ Cotton Friction Tape or equivalent to prevent future concerns. Proceed to Step 8. No - wrap affected area with 3M™ Temflex™ Cotton Friction Tape or equivalent to prevent future concerns. Proceed to Step 8. Print the information sheet and provide to the customer. Communicate to the customer that Ford recommends disconnecting any devices attached to the auxiliary power port, USB port and OBDII port when the vehicle is turned off (such as cell phone chargers, USB devices, insurance company snapshot devices). (Figure 5) Obtain Locally Part Number Part Description 1755 3M™ Temflex™ Cotton Friction Tape PART NUMBER PART NAME DM5Z-19K350-B TCU Module BXT-67R 12-V Battery OTHER APPLICABLE ARTICLES 13B12

The 2nd replaced, about a year and a half ago, 12V battery on my CMAX is probably not getting charged even after driving on highway for 50mins to 1hour recenlty: 01/20/2015 11:15AM, after parked the car for 3 hours after hi-way driving 1hour, turned the key to ignition postion 1 to get the radio playing. After 3mins, the radio shutoff, turned the key to ignition postion 3, the "low battery..." message appeared. Turned the car off, and turned the key to postion 1 again, 1 to 2 minus later the radio turned off again. Turned the car on, the "low battery" appeared again. This time I left the key at position 3 for 10mins, hopefully the 12V get charge. 01/21/2015 7:40AM, right after hi-way driving for about 50mins, parked the car, removed the key, radio still playing (have not open the door yet). After 1min, the "low battery" appeared but the screen immediately shutoff. Turned the key to position 3, and there it was the "low battery" appeared again. For each time, I got into and looked at the ET screen for the 12V voltage. If key was at postion 2, the 12V had 12.4Volt constantly. And when I turned the key to postion 3, it showed between 14.3 and 14.4 (flickering between those 14.3 and 14.4). I could have radio on for 20mins or more when key is at postion 1 or 10mins when the key is taken out before I open the driver door. The "low battery" happened from time to time before but never in twice in a row like the above. There were times I saw the "low battery" message and the radio was auto-shutoff. But immediately after that, took out the key, turned the key to position 3 and back to position 1: no "low battery" for 20mins or more until I shut the car off and opened the door. There were also times I saw the "low battery" message on the previous days. And after driving 1 to 2 hours, parked the car for 3 to 4 hour, and then the key to postion 1 and the radio play for 50mins or more before I turned off the car and locked the car. It is probably whatever computer component controlling the 12V battery charging or reading has gone haywire. Or it has always been like this, I do not know. Or the 12V battery is in need of another replacement, but then that replacement get no charging as it is always supposed to. Or another problem adding to the unknown phanthom discharge that still not sovled by Ford.

Interesting that Tesla is experiencing, apparently, some of the same 12V battery issues that the C-Max's have, with some of the same solutions. http://www.plugincars.com/tesla-owners-encounter-ev-related-problems-12-volt-battery-129287.html