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CCM not working after battery jump

Tiny
JAYMARSH96
  • MEMBER
  • 2002 VOLVO S60
  • 2.3L
  • 5 CYL
  • FWD
  • AUTOMATIC
  • 141,200 MILES
After jumping my vehicle because it had a dead battery the climate control does not work (I used the trunk battery to jump it). All other buttons and functions work; STC, gauges, sunroof, shifter light, etc. This problem happen once before and mysteriously while sitting in the car the climate control kicked on and was working before it was jumped again. What could be the problem now?
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Monday, December 19th, 2016 AT 9:02 AM

5 Replies

Tiny
STEVE W.
  • MECHANIC
  • 12,981 POSTS
Could be anything from a blown fuse, poor connection or a failed component in the control module.
Did the battery get low because of setting or did it die unexpectedly? You might want to have the battery load tested, usually a normal car battery does not like going dead, it can cause low voltage problems and more.
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Monday, December 19th, 2016 AT 12:50 PM
Tiny
JAYMARSH96
  • MEMBER
  • 8 POSTS
The battery went dead because of a faulty high beam switch on the stalk. It's very sensitive when dealing with the car. I could close the door too hard and the high beam switch will activate the lights. The stalk has to be replaced.
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Tuesday, December 20th, 2016 AT 5:50 AM
Tiny
STEVE W.
  • MECHANIC
  • 12,981 POSTS
Looking at the wiring it looks like the heat controls and the headlights all plug into the same control module. It is possible that the control signal was scrambled by a surge when the car was jumped. I would disconnect the battery change out the switch and put in a new battery. Start it and see what you get.
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Tuesday, December 20th, 2016 AT 11:16 AM
Tiny
JAYMARSH96
  • MEMBER
  • 8 POSTS
You wouldn't suggest I should still go to the dealership and get the software update for the ccm?
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Tuesday, December 20th, 2016 AT 2:31 PM
Tiny
STEVE W.
  • MECHANIC
  • 12,981 POSTS
You could but if the switch is causing you the problem you may end up right back at square one if it happens again. If they are replacing the switch and doing the update, then go ahead.
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Tuesday, December 20th, 2016 AT 3:40 PM

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