ACS malfunction?
Thread Starter
Pro
Joined: Feb 2004
Posts: 539
Likes: 0
From: Nevada City CA
ACS malfunction?
My 04 has been invaded by electronic gremlins.
First the cruise control starting disengaging for no apparent reason. I tightened the switch on the brake pedal no effect.
Then I noticed Active Control System flashing message followed by the the cruise disengage.
Diagnostic error codes:
C1278 C TCS Temporarily Inhibited By PCM
P0492 H
B0367 H
B2860 H
Any ideas before I take it to the stealership?
First the cruise control starting disengaging for no apparent reason. I tightened the switch on the brake pedal no effect.
Then I noticed Active Control System flashing message followed by the the cruise disengage.
Diagnostic error codes:
C1278 C TCS Temporarily Inhibited By PCM
P0492 H
B0367 H
B2860 H
Any ideas before I take it to the stealership?
Racer
Joined: Jun 2003
Posts: 256
Likes: 0
From: Newport Beach Ca
I would start with the "known basic problems" that plague everyone:
1. Battery -- robust and healthy or marginal??? Replace if marginal.
2. Battery terminals all clean and tight??
3. Alternator OK?? Should be around 14.7 volts at alternator at idle
4. Grounds -- clean and tighten
It's either time or money --- there are a number of really simple problems that can set DIC codes. The simple ones you can tackle yourself if you have the time to invest. Rule out the simple before you assume it's complex and then spend a lot of $.
1. Battery -- robust and healthy or marginal??? Replace if marginal.
2. Battery terminals all clean and tight??
3. Alternator OK?? Should be around 14.7 volts at alternator at idle
4. Grounds -- clean and tighten
It's either time or money --- there are a number of really simple problems that can set DIC codes. The simple ones you can tackle yourself if you have the time to invest. Rule out the simple before you assume it's complex and then spend a lot of $.
Racer
Joined: Jun 2003
Posts: 256
Likes: 0
From: Newport Beach Ca
You're welcome. I would start there --- 4 years is about it for the stock Delco battery. Mine gave up at 4 years --- and it gave up over a period of about a week. Started getting funky DIC messages; otherwise OK and starting just fine --- had it on a trickle charger when it was parked at home. After about a week of strange DIC messages, drove it to work one morning and that was that -- went out a couple of hours later to go to the bank and everything was dead.
Thread Starter
Pro
Joined: Feb 2004
Posts: 539
Likes: 0
From: Nevada City CA
You're welcome. I would start there --- 4 years is about it for the stock Delco battery. Mine gave up at 4 years --- and it gave up over a period of about a week. Started getting funky DIC messages; otherwise OK and starting just fine --- had it on a trickle charger when it was parked at home. After about a week of strange DIC messages, drove it to work one morning and that was that -- went out a couple of hours later to go to the bank and everything was dead.
I guess I will lookup info about the grounds and clean them up/tighten.
Thanks again. Without the CF brothers I would have spent a LOT of money at the dealership!
Racer
Joined: Jun 2003
Posts: 256
Likes: 0
From: Newport Beach Ca
Glad you made progress -- see the "sticky" at the top of this section written by Bill Curlee entitled "Important Electrical Information". Great help on where the grounds are located and how to clean them.
