Oh No! it happened again :-(
Thread Starter
Instructor
Joined: Jul 2003
Posts: 126
Likes: 0
From: Baton Rouge LA
Oh No! it happened again :-(
Turn on ignition key (nothing).
I had this occasional problem a few months back so I did the following,
- Bypassed the clutch interlock
Still not working
- Checked out the starter relay (relay OK but car not starting)
- Installed a new battery
Still not working
- Installed a new starter
Works great !
3 weeks go by and no problems. Until today (same problem)
What else can I fix/replace?
Maybe I have a short in the ignition switch?
Thanks for your advise,
Bill
I had this occasional problem a few months back so I did the following,
- Bypassed the clutch interlock
Still not working
- Checked out the starter relay (relay OK but car not starting)
- Installed a new battery
Still not working
- Installed a new starter
Works great !
3 weeks go by and no problems. Until today (same problem)
What else can I fix/replace?
Maybe I have a short in the ignition switch?
Thanks for your advise,
Bill
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
Bill,
What is the status of the SECURITY lamp when you turn the key to the ON position ???
Do you hear any relays click when you turn the key to start ??
Have you checked to see if there are any DTC posted that may inhibit starting ???
What is the status of the SECURITY lamp when you turn the key to the ON position ???
Do you hear any relays click when you turn the key to start ??
Have you checked to see if there are any DTC posted that may inhibit starting ???
Melting Slicks
Joined: Feb 2007
Posts: 3,191
Likes: 10
From: New Smyrna Beach Florida
might want to try cleaning the pellet on your key
I had a similar situation many years ago on a firebird formula. Every now and then I would go to start the car and nothing would happen. In my case it was static electricity building up in the key. If the security module don't recognize the chip, it ain't gonna start.
Tech Contributor
Joined: Jan 2007
Posts: 19,421
Likes: 1,146
From: Dyer, IN
Turn on ignition key (nothing).
I had this occasional problem a few months back so I did the following,
- Bypassed the clutch interlock
Still not working
- Checked out the starter relay (relay OK but car not starting)
- Installed a new battery
Still not working
- Installed a new starter
Works great !
3 weeks go by and no problems. Until today (same problem)
What else can I fix/replace?
Maybe I have a short in the ignition switch?
Thanks for your advise,
Bill
I had this occasional problem a few months back so I did the following,
- Bypassed the clutch interlock
Still not working
- Checked out the starter relay (relay OK but car not starting)
- Installed a new battery
Still not working
- Installed a new starter
Works great !
3 weeks go by and no problems. Until today (same problem)
What else can I fix/replace?
Maybe I have a short in the ignition switch?
Thanks for your advise,
Bill
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
If you can hear the relay in the passenger footwell going off when you turn the key (get a friend), then you have power going to the starter.
I'm suspecting that the starter you picked up may be faulty.
I'm suspecting that the starter you picked up may be faulty.
Thread Starter
Instructor
Joined: Jul 2003
Posts: 126
Likes: 0
From: Baton Rouge LA
Oh No! it happened again :-(
Answers to questions:
Security lamp appear normal
All dash lights/guages appear normal
Relay clicks
No error codes on the DIC
Everything seems normal but
when I turn the key 'nothing'...
Coule be a static problem (I guess).
After waiting several minutes and retrying several times,
eventually it works.
Haven't tried cleaning the key pellet. It looks OK
but I'll give it a try.
Security lamp appear normal
All dash lights/guages appear normal
Relay clicks
No error codes on the DIC
Everything seems normal but
when I turn the key 'nothing'...
Coule be a static problem (I guess).
After waiting several minutes and retrying several times,
eventually it works.
Haven't tried cleaning the key pellet. It looks OK
but I'll give it a try.
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
About the "security" light, is it flashing or on steady?
Flashing is bad and means the BCM doesn't recognize the key, on steady is what it should be doing.
Flashing is bad and means the BCM doesn't recognize the key, on steady is what it should be doing.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Thread Starter
Instructor
Joined: Jul 2003
Posts: 126
Likes: 0
From: Baton Rouge LA
The next time it happens I'll double check the Security light.
The problem is everything works OK for several weeks, then
without warning the problem will occur.
I cleaned the key 'pellet' - maybe that will help.
THANKS for all the suggestions,
Bill
The problem is everything works OK for several weeks, then
without warning the problem will occur.
I cleaned the key 'pellet' - maybe that will help.
THANKS for all the suggestions,
Bill
Burning Brakes
Joined: Sep 2007
Posts: 1,048
Likes: 300
From: FL
Others may chime in with more detail...the TDR is located on the passenger side floorboard. When you press the clutch in all the way during starting you should here a click down near the passenger side footboard. This is just one of the relays involved in the starting process. While troubleshooting I learned that this is a relatively inexpensive part that could be replaced to alleiviate the problem. If the TDR is not functioning properly you will not hear the click, which in turn will not send the signal to the starter.
If the TDR is ok, it may be that you actually have another bad starter. Sometimes, the solenoid can be bad, which will cause the same issue you are describing. When it doesn't start listen for the click down on the passenger side footboard.
If the TDR is ok, it may be that you actually have another bad starter. Sometimes, the solenoid can be bad, which will cause the same issue you are describing. When it doesn't start listen for the click down on the passenger side footboard.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
With the key in the ignition, and the lock in the OFF position, what is the status of the SECURITY lamp ??? When the ignition is OFF the SECURITY lamp shows the status of the "Content Theft Deterrent" (CTD) system, which is the system that will "alarm" if a door is opened, for example, without the key or fob unlocking it. The CTD will, in "alarm" mode, disable engine start.
With the key in the ignition, and turned to the ON position, what is the status of the SECURITY lamp ??? In the ON position the SECURITY lamp shows the status of the Vehicle Theft Deterrent (VTD) system. If, for example, the resistance of the VATS pellet in the key does not match what the BCM is programmed for, the BCM will inhibit engine start.
Using the SECURITY lamp and DTC data, we can start to narrow down where the problem is. Generally a wiring problem (bad ground, bad contacts) will cause a no-start with no other symptoms (no DTC data) while a problem with, for example, reading the correct resistance in the key will usually set a DTC.
Use this link to check for DTC data ...
https://www.corvetteforum.com/techti...D=26&TopicID=1
Last edited by BlackZ06; Feb 8, 2008 at 08:56 AM.
Thread Starter
Instructor
Joined: Jul 2003
Posts: 126
Likes: 0
From: Baton Rouge LA
You’re right Stephen,
I’m thru replacing parts until I can diagnose the problem.
The next time I have this problem:
- Check the SECURITY lamp condition
(lamp on-OK) (lamp blinking-possible vats pellet problem)
- If the Security lamp is OK
(check for DCTs)
If I have an intermittent VATS pellet problem how should I proceed?
Thanks for the info ...
I’m thru replacing parts until I can diagnose the problem.
The next time I have this problem:
- Check the SECURITY lamp condition
(lamp on-OK) (lamp blinking-possible vats pellet problem)
- If the Security lamp is OK
(check for DCTs)
If I have an intermittent VATS pellet problem how should I proceed?
Thanks for the info ...
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
You’re right Stephen,
I’m thru replacing parts until I can diagnose the problem.
The next time I have this problem:
- Check the SECURITY lamp condition
(lamp on-OK) (lamp blinking-possible vats pellet problem)
- If the Security lamp is OK
(check for DCTs)
If I have an intermittent VATS pellet problem how should I proceed?
Thanks for the info ...
I’m thru replacing parts until I can diagnose the problem.
The next time I have this problem:
- Check the SECURITY lamp condition
(lamp on-OK) (lamp blinking-possible vats pellet problem)
- If the Security lamp is OK
(check for DCTs)
If I have an intermittent VATS pellet problem how should I proceed?
Thanks for the info ...
A bad contact may be something as simple as the wiring to the starter motor. I believe in an earlier post you said the starter was replaced. Check and be sure that the wiring to the starter has not come loose. Be careful, disconnect the battery before working on the starter wiring.
Thread Starter
Instructor
Joined: Jul 2003
Posts: 126
Likes: 0
From: Baton Rouge LA
Well, my problem is intermittent so now it's working
and the Security lamp is off (both) with the key off and on.
I checked for DCTs - I have 3
10-PCM
P1631 H
40-BCM
B2723 H
A6-SCM
B2607 H
I'll try to look these up
THANKS
and the Security lamp is off (both) with the key off and on.
I checked for DCTs - I have 3
10-PCM
P1631 H
40-BCM
B2723 H
A6-SCM
B2607 H
I'll try to look these up
THANKS
Thread Starter
Instructor
Joined: Jul 2003
Posts: 126
Likes: 0
From: Baton Rouge LA
I checked my DTC codes:
10-PCM
P1631 Theft Deterrent System password Incorrect-C
40-BCM
B2723 PASS-Key Detection Circuit
A6-SCM
B2607 Seat Horizontal Position Sensor Failure
Not concerned about A6-SCM but the other two DTCs
probably explain my intermittent starting problem.
Now what to do about it?
Stephen mentioned 'bad ground'.
I'll review Forum posts and try to locate the grounding areas
I need to check out.
What else could cause a 10-PCM P1631 and a 40-BCM B2723?
Thanks for the suggestions
10-PCM
P1631 Theft Deterrent System password Incorrect-C
40-BCM
B2723 PASS-Key Detection Circuit
A6-SCM
B2607 Seat Horizontal Position Sensor Failure
Not concerned about A6-SCM but the other two DTCs
probably explain my intermittent starting problem.
Now what to do about it?
Stephen mentioned 'bad ground'.
I'll review Forum posts and try to locate the grounding areas
I need to check out.
What else could cause a 10-PCM P1631 and a 40-BCM B2723?
Thanks for the suggestions