Help! c5 is completely ****ed!
Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
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From: Sacramento CA
Help! c5 is completely ****ed!
04
I had to unplug the little silver computer in the back rear storage compartment, as well as unplug the relay boxes in the doors. I reconnected them, and turned the car on, and got a myriad of messages:
REDUCED POWER
SHOCKS INOPERABLE
LOW TIRE PRESSURE
LOW FUEL
(The last 2 are certainly not true.)
And the car won't start - It just clicks.
I had to unplug the little silver computer in the back rear storage compartment, as well as unplug the relay boxes in the doors. I reconnected them, and turned the car on, and got a myriad of messages:
REDUCED POWER
SHOCKS INOPERABLE
LOW TIRE PRESSURE
LOW FUEL
(The last 2 are certainly not true.)
And the car won't start - It just clicks.
Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
Le Mans Master
Joined: Aug 2003
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From: American Canyon Lethal Injection
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Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
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From: Sacramento CA
Race Director
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From: Now in God's Country, the Big Sky, Montana!
Cruise-In 7-8-9-10 Veteran
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
These cars act really really weird when the battery is low or if the battery is bad. A battery can even check good and still be bad. As stated above, make sure it is FULLY charged. Other than that, go get yourself another battery and try it. If it doesn't work, you can always bring the battery right back.
Le Mans Master
Joined: Aug 2003
Posts: 9,298
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From: American Canyon Lethal Injection
These cars act really really weird when the battery is low or if the battery is bad. A battery can even check good and still be bad. As stated above, make sure it is FULLY charged. Other than that, go get yourself another battery and try it. If it doesn't work, you can always bring the battery right back.
excellent point. Also as mentioned once you have a fully charged batt. disconnect it for about 10 minutes. PCM will reset and then try to delete all the codes.Good luck...
Le Mans Master
Joined: Sep 2006
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From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
tire pressure readout
fwiw in my 01, the tire pressures are no good unless I drive it halfway round the block so u probably should discount that one
take the battery out of your other car or use jumper cables...less driving around
you probably got those messages because only part of the things that report to the ecm lost power. disconnecting the battery and reconnecting it again might do the trick
sometimes capacitors are used to keep circuits alive, and connecting and disconnecting circuits sometimes bleeds them off
take the battery out of your other car or use jumper cables...less driving around
you probably got those messages because only part of the things that report to the ecm lost power. disconnecting the battery and reconnecting it again might do the trick
sometimes capacitors are used to keep circuits alive, and connecting and disconnecting circuits sometimes bleeds them off
Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
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From: Sacramento CA
Well, I let it charge all night (disconnected from the car)
hooked it up this morning, and it's the same problem.
What else could it be?
Does anyone know where the PCM is grounded? Maybe i knocked the ground out when I had the battery tray out.
Or what fuse controls the tire pressure sensor readers, fuel gauge?
hooked it up this morning, and it's the same problem.
What else could it be?
Does anyone know where the PCM is grounded? Maybe i knocked the ground out when I had the battery tray out.
Or what fuse controls the tire pressure sensor readers, fuel gauge?
Last edited by Kale; Dec 31, 2006 at 12:33 PM.
Le Mans Master
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From: Russellville, Kentucky 1967 Sting Ray & 2001 C5
Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
I put my SAAB's battery in the C5, and it has the same prob lem still.
saab battery is about 1.5 years old.
What fuse would cover this?
* No fuel gauge reading
* No tire pressure reading
* Fails communication to all computers
I checked "PCM-B" under the hood, but it was intact.
saab battery is about 1.5 years old.
What fuse would cover this?
* No fuel gauge reading
* No tire pressure reading
* Fails communication to all computers
I checked "PCM-B" under the hood, but it was intact.
Last edited by Kale; Dec 31, 2006 at 01:09 PM.
