[somms]

Hi kindly help, my Chevrolet volt 2013 battery is not charging. I have replaced the 12volts battery buy it keeps shutting down even if I jump start it it doesn't get charged. The dashboard dtc shows service battery charging system. The volt is out of the coverage of onstar so they cant run checks. Please advice if there is anything I need to reset.

Replacing my OBCM

You may have an issue with the Lear 3.3kW High Voltage Charger on your Gen1. The on board charger keeps the 12V AGM topped-off during the charging cycle and this can be tested by performing the following:

With the Volt OFF and 12V AGM connected, begin a charge by plugging in your EVSE. After a couple of min, check the DC Voltage between B+ and chassis ground. It should indicate @13VDC. Lift the negative cable off of the 12V AGM removing it from the circuit. Your Volt should continue charging uninterrupted and there should continue to be @13VDC present between B+ and chassis ground.

 

[somms]

Hi o finally got a technician to open the trunk and checked apm out everything was tight no loose bolts or screws. The only fuse I saw is attached and a picture of the apm and battery is attached.
I removed the fuse do I can take it for the test but I don't know what to test for.
Kindly advise please as am stuck with the reality of no Chevy volt technicians or service station around.
Thanks

With the Volt OFF and 12V AGM connected, begin a charge by plugging in your EVSE. After a couple of min, check the DC Voltage between B+ and chassis ground. It should indicate @13VDC. Lift the negative cable off of the 12V AGM removing it from the circuit. Your Volt should continue charging uninterrupted and there should continue to be @13VDC present between B+ and chassis ground.

Nice pic of a fuse...did you even try the test suggested over a month ago!?

 

[somms]

Do you have an idea of how I can test the fuse?

 

[somms]

Hello can anyone walk me through how to test my volt 12v charging system. I want to buy an APM but want to be sure before I buy. There is no Chevrolet volt service station here.
I have done a test buy charging the 12volt battery full and the voltmeter read 13volts while car is off. I then started the Chevrolet volt, the petrol engine also came on and I took the reading with engine on it was 12volts.
Any idea if this is an indication that the APM is bad? Note that I also took readings with the voltmeter from APM cables and it was same with battery reading

Suppose a decent way to confirm your APM is working would be as simple as removing the 12V AGM voltage while the Volt was turned ON and confirming your Volt continues to operate and behave normally, i.e no check engine lights.

This can be accomplished by removing the negative battery lead off the top of the 12V AGM while the car is turned ON. Keep in mind the Volt requires 12V AGM voltage initially to turn on but then the 12V AGM circuit can be removed with the negative lead and the Volt can still be driven just as normal since I have done this before!