Is my computer controlled charging system bad?

Asked by Mar 21, 2017 at 09:16 PM about the 2007 Chevrolet Malibu LS

Question type: Maintenance & Repair

I have an 07 malibu ls 3.5 v6. About a year and 6 months ago i was driving
and my tc light came on. shortly there after my abs light and display say
service power steering and my wheel got stiff. i pulled over and shut the car
off and check my batt cable and the were fine. i go to leave and it wont
start and barley crank at that. i got a tow and went home and pulled the alt
to be tested at autozone. they said it was fine. not knowing what to do i
went to a shop and got charged $600 to have my alt replaced. car ran fine.
fast forward to last week. my wife goes to leave work and it wont start. a
batt and a starter later im good till today. the same dash lights came on as
before with no power steering and the addition of the batt light. other forum
threads that i read today say its the computer controlled charging system?
is there a way i can check this and how do i repair it?

3 Answers

73,085

What you check is with the engine running, check with a digital multi meter at the battery, it should show around 14.5 DCV if the charging system is working properly. Also rev the engine up to see if the voltage changes. It should not go over 14.7 DCV.

1 of 1 people found this helpful.
Best Answer Mark helpful

With the car running it was at about 13.4. We revd the rpm and it actually dropped to about 13.3. What does this mean?

73,085

The alternator is not putting out enough voltage, should not be any lower than 14 volts. A new rebuilt alternator should be putting out 14.5 to 14.7 DCV. I'm not sure if it is because of the voltage regulator on the alternator, or if the computer has anything to do with it. My opinion is that it is still in the alternator voltage regulator. I would have the alternator tested at a couple of different places. Some parts stores have better testing equipment than others.

1 of 1 people found this helpful.

Your Answer

Malibu

Looking for a Used Malibu in your area?

CarGurus has 2,259 nationwide Malibu listings starting at $2,500.

Postal Code:

Chevrolet Malibu Experts

  • #1
    tenspeed
    Reputation
    2,100
  • #2
    T_S_T
    Reputation
    2,010
  • #3
    Tom Demyan
    Reputation
    1,480
View All

Related Models For Sale

Used Chevrolet Impala
72 Great Deals out of 928 listings starting at $1,900
Used Ford Fusion
159 Great Deals out of 2,049 listings starting at $995
Used Honda Accord
69 Great Deals out of 1,098 listings starting at $748
Used Nissan Altima
59 Great Deals out of 1,264 listings starting at $2,750
Used Toyota Camry
43 Great Deals out of 1,573 listings starting at $2,400
Used Dodge Charger
83 Great Deals out of 812 listings starting at $1,999
Used Hyundai Sonata
43 Great Deals out of 1,289 listings starting at $1,781
Used Kia Optima
33 Great Deals out of 758 listings starting at $1,232
Used Honda Civic
316 Great Deals out of 4,078 listings starting at $1,494
Used Nissan Maxima
25 Great Deals out of 322 listings starting at $3,495
Used Chevrolet Equinox
109 Great Deals out of 4,769 listings starting at $138
Used Chrysler 300
83 Great Deals out of 1,014 listings starting at $1,795

Used Cars For Sale

2017 Chevrolet Malibu LS For Sale
169 listings starting at $23,532
2016 Chevrolet Malibu LS For Sale
4 listings starting at $21,016
2015 Chevrolet Malibu LS For Sale
28 listings starting at $10,995
2014 Chevrolet Malibu LS For Sale
10 listings starting at $11,771
2013 Chevrolet Malibu LS For Sale
26 listings starting at $8,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.