SECURITY / SYS light????
Thread Starter
Burning Brakes
Joined: May 2000
Posts: 1,160
Likes: 10
From: Nashville TN
SECURITY / SYS light????
Does your SECURITY light flash at the same time as your SYS light? I'm still trying to trace down the stupid gremlins in the car and I'm about ready to burn the thing down to the ground. I have a starting problem where the motor turns over at full speed but does not fire. This happens randomly and thinking it was VATS, I would wait 3 minutes. This usually worked, but I know now that the VATS system disables the starter, but mine turns over, just won't start. Now the car won't start at all, argg.
I get it every now and then when I am driving or turn the key to on. The SECURITY and SYS lights will flash, and then the MPG takes a few seconds to reset itself. I know the SYS means a code is being set, but I am just wondering if the SECUIRTY light usually flashes too.
Ohh, '93 LT1.
[Modified by kman0066, 9:31 PM 3/5/2004]
I get it every now and then when I am driving or turn the key to on. The SECURITY and SYS lights will flash, and then the MPG takes a few seconds to reset itself. I know the SYS means a code is being set, but I am just wondering if the SECUIRTY light usually flashes too.
Ohh, '93 LT1.
[Modified by kman0066, 9:31 PM 3/5/2004]
Thread Starter
Burning Brakes
Joined: May 2000
Posts: 1,160
Likes: 10
From: Nashville TN
Re: SECURITY / SYS light???? (kman0066)
And the plot thickens.
Codes retrieved.(C-current, H-history)
1. C41, H41.
4. H72
--- ERR
9. H74
What the frick. Code 41 seems to be for L98 motors and 72 is the VATS junk I think, and 74 is not listed in any reading I've found. And how is getting codes set for C41 when the car is not even started, arggg.
AND, I'm not getting C12, is that a problem anybody's had before?
My, ECM's shot isn't it
[Modified by kman0066, 9:59 PM 3/5/2004] :cry
[Modified by kman0066, 10:00 PM 3/5/2004]
Codes retrieved.(C-current, H-history)
1. C41, H41.
4. H72
--- ERR
9. H74
What the frick. Code 41 seems to be for L98 motors and 72 is the VATS junk I think, and 74 is not listed in any reading I've found. And how is getting codes set for C41 when the car is not even started, arggg.
AND, I'm not getting C12, is that a problem anybody's had before?
My, ECM's shot isn't it
[Modified by kman0066, 9:59 PM 3/5/2004] :cry
[Modified by kman0066, 10:00 PM 3/5/2004]
Pro
Joined: Sep 2001
Posts: 743
Likes: 4
From: Guyton GA
Re: SECURITY / SYS light???? (kman0066)
First, the SYS flashes because the CCM detects a problem not the ECM(powertrain). No, SECURITY flash is not always flashing with the SYS. However, it is likely that the SYS flash is caused by a security system problem. Check all your fuses :steering:
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Re: SECURITY / SYS light???? (kman0066)
And the plot thickens.
Codes retrieved.(C-current, H-history)
1. C41, H41.
4. H72
--- ERR
9. H74
Codes retrieved.(C-current, H-history)
1. C41, H41.
4. H72
--- ERR
9. H74
Your CCM is reporting C/H41 - PCM Loss of Communications. How can FEDS succeed if they can't talk to each other?
Your PCM is reporting H72 - Loss of vehicle speed sensor. The PCM gets it speed data from the CCM. No communications = no speed data.
My guess is your CCM is fine, PCM *might* not be. Check the communications wires for bad connections.
I'm not sure what H74 is on the TCS/ABS, it's not listed in my '95 manual. My guess is it's communications related as well.
G'luck
:cheers:
Thread Starter
Burning Brakes
Joined: May 2000
Posts: 1,160
Likes: 10
From: Nashville TN
Re: SECURITY / SYS light???? (Atok)
I have a ECM, and yes, I put a chip from PCMforless in it, but it was happening even before then. The more I look at archived posts, the more it looks live an ECM, I've seen some posts that were almost perfectly identical to mine.
I know it's the CCM throwing the codes, but I think the ECM is what is causing the CCM to do that. I'm going to check all the connections, but for reference, where is the best place to get a new ECM. ZIP products sells one on the Forum Mall for $85, is that a good deal or should I stay away from remanufactured ECM's.
I know it's the CCM throwing the codes, but I think the ECM is what is causing the CCM to do that. I'm going to check all the connections, but for reference, where is the best place to get a new ECM. ZIP products sells one on the Forum Mall for $85, is that a good deal or should I stay away from remanufactured ECM's.
