sam-garcia

I know there is some threads already out there about this but my situation is different,

My airbag light and the B0026 showed up one day out of nowhere. A few days after switching out the shocks on my 2003 corvette. The interesting thing is that when I turn the steering wheel all the way to the right side, the airbag light goes away! As soon as I turn it back the light comes back on?

Any input please?? Do I need to replace the clockspring? If so, what is the correct part and wheel puller that I can order from Amazon...?

Thank you to everyone in advance.

mike venth

Had the same problem last year,, changed the coil/clock spring and all is well.....
Here is the information I used, hope it helps.....


DTC B0022, B0024, or B0026
Circuit Description
The inflatable restraint steering wheel module deployment loop consists of the inflatable restraint steering wheel module, the inflatable restraint steering wheel module coil, and the steering wheel module high and low circuits. A shorting bar used within the steering wheel module coil connector shorts together the steering wheel module high and low circuits when the connector is disconnected. This helps to prevent unwanted deployment of the inflator module during servicing. During a frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) allows current to flow through the deployment loop in order to deploy the steering wheel module. When the ignition is turned ON, the SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.

Conditions for Running the DTC
Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC
DTC B0022 will set when the steering wheel module deployment loop resistance is less than 1.3 ohms for 300 milliseconds.
DTC B0024 will set when one of the following conditions occur:
Steering wheel module high circuits is more than 6 volts for 300 milliseconds.
Steering wheel module high circuit is less than 2 volts and steering wheel module deployment loop resistance is less than 6 ohms for 300 milliseconds.
DTC B0026 will set when one of the following conditions occurs:
Steering wheel module high circuit is less than 2 volts and the steering wheel module deployment loop resistance is more than 4.8 ohms for 500 milliseconds.
Steering wheel module deployment loop resistance is more than 6 ohms for 300 milliseconds.
Action Taken When the DTC Sets
The SDM commands the AIR BAG indicator ON via Class 2 serial data.

Conditions for Clearing the DTC
The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
A history DTC will clear once 255 malfunction free ignition cycles have occurred.
Diagnostic Aids
The following are possible causes of the malfunction:

A short between the steering wheel module high and low circuits.
An open or a high resistance in the steering wheel module high or low circuits.
A short to ground or a short to voltage in the steering wheel module high or low circuits.
The steering wheel module coil connector
The SDM connector
A malfunctioning steering wheel module
A malfunctioning steering wheel module coil
A malfunctioning SDM
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent and Poor Connections in Wiring Systems

ALSO ,, information on the airbag itself...

Originally Posted by Red-Vroom
Does anyone know of a fix for an airbag light that stays on all the time on the C5? Is the number of times the light blinks on startup mean anything? I recently did a pull / re-install for a horn in-opp issue.
YES

Read and post your DTCs and it will tell you whats not happy.

READING YOUR Engine Diagnostic Codes (DTCs)

The Diagnostic Display Mode is entered with the following procedure:
1) Turn on the ignition but don't start the engine.
2) Press the RESET button to turn off any warning messages. (i.e. door open, trunk open etc…)
3) Press and hold OPTIONS
4) While holding OPTIONS, press FUEL four times within a 10-second period.

Initially, on-board diagnostics go into an Automatic Mode which shows diagnostic codes in a pre-set sequence: PCM - TCS - RTD - BCM - IPC - RADIO - HVAC - LDCM - RDCM - SCM - RFA. All codes will be displayed for each. ( i.e. PCM = 4 codes)
If none are present in a given module, you will see No More Codes on the display.
There are two kinds of diagnostic codes, Current and History designated with a letter suffix, C or ;H. A current code indicates a malfunction is present in the module displaying data. A history code indicates a problem existed sometime in the last40 or 50 ignition cycles. When not accompanied by a current code of the same number, it's potential evidence of a previous problem, now resolved, that was not removed by clearing the codes.

More likely it's an indication of an intermittent malfunction.
Intermittent codes are the most challenging of the diagnostics. An intermittent code may have happened once, may have happened more than once but is inconsistent or may be happening on a regular basis but not at the time the codes are displayed. History codes can also be caused by a current malfunction in a system that is not operating at the time codes are displayed. An example is the rear window defogger which doesn't operate until the Body Control Module detects engine rpm. For history codes set by a module that does not operate with the key on and engine off, a special diagnostic tool called a Scan Tester is necessary to properly diagnose the malfunction.
Once the system has displayed all modules, it goes into the manual mode which allows selection of each module using combinations of Driver Information Center buttons. Manual mode can also be entered during the automatic sequence by pressing any button except E/M. Once the display shows Manual Diagnostics, select a module by pressing the OPTIONS button to go forward or the TRIP button to go back. Once a module is selected, a code is displayed, and if more than one are present;
press GAGES to go forward or FUEL to go back.
To exit the diagnostic mode at any time, press E/M. If you want to erase codes in a given module, press RESET
To reset the codes once in manual mode, press and hold RESET until it displays NO CODES Press OPTIONS to go to the next module. Repeat the steps until you have reset the codes in all the computer modules.
NOTE!! Only reset the codes IF you want to - it is NOT necessary to do this. Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory. If you clear the code/s, and extinguish the Check Engine Light, your emissions status ready will NOT allow you to pass an emissions test until you have completed the required driving cycles.
Once you have the codes, the next question is: What to do with the information?
First, consult the factory service manual. Any serious C5 Do-It-Yourself owner should invest in the Corvette Service Manual of the appropriate model year. The Service Manual is really a requirement if you want to understand and work on your C5.
Here is very good site of DTC definitions:

http://www.gearchatter.com
Make sure to include the H or C suffix!!
Here they are:

B0026HC ???
C1255H EBTCM Internal Malfunction
U1064H Loss of Communications with BCM
B2285H Battery #2 Fault
U1064H Loss of Communications with BCM
U1096H ???
U1016H Loss of Communications with PCM

As you can see some of these I don’t know the meaning?

All I did is disconnect the battery, pull the #16 fuse from the panel in the passenger side foot well, removed the airbag / horn button and dis-connected the yellow cable + horn wires. I reversed all the steps when I put it back together.

Any Ideas? –
B0026HC = LF/Driver Frontal Deployment Loop (single stage or stage 1) OPEN
U1096H Loss of comms with IPC

Ok,,,You have LOTS of Loss of Comms codes and a B2285H Battery #2 Fault. Two things can cause a LOSS OF COMMS.
- An actual loss of communications cause by corruption of the serial buss.
- Loss or incorrect power to the modules effected.

A couple of things to check out:

Is your battery fully charged and in good condition/ Recommend removing the battery, cleaning the battery cable terminals. Have the battery fully checked out at a automotive store. Check the battery for proper Cold Cranking Amps and output under load.
Found the Bug!

After you I.D. the B0026 code as an open circuit & I’m back at my garage. I pulled the air bag again and checked out the yellow 90º connector, when I went to pull the “snap pin” the whole connector came off the air bag, it never made contact and was about 1/4" off the surface. With the “snap pin” removed I made sure the connector was well seated against the air bag, on a C5 the bulk of the connector should fit flush against the air bag then put in the snap pin. Now the connector is secure.

The airbag light now goes off when the car is on. Thank you for the help.



I just went through an airbag light problem after replacing a broken horn membrane. There is only one connector that runs from the airbag to the steering wheel (it's a large yellow pin type connector that plugs into the center of the steering wheel behind the airbag) the other two wires you'll find back there are for the horn membrane.

You could pull the steering wheel apart and check to make sure that the wire is seated correctly and isn't damaged... It should be locked into place. Forgive the sloppy description, but there is a tab that pulls out of the back of the yellow connector for the airbag, to ensure proper connection, pull the tab out of the connector and plug the other side of it into the socket in the rear center of the airbag assembly, then press the tab back into place. This will lock the connector into the socket.

BE VERY CAREFUL IF YOU'RE GOING TO DO THIS and I'd recommend getting the service manual procedures for disabling the airbag. Airbag deployment as I understand it is >300 ft./second and that would really hurt. I was also told that the SBIR assembly can retain power for up to ten minutes after the battery is disconnected so make sure it's off the juice for a while. I also pulled fuse 16 (I think) from the fusebox in the passenger side floorboard and disconnected the airbag harness at the base of the steering column which you can access by removing the knee bolster. After that it's just two T30 torx bolts to remove the steering wheel cover and the SBIR assembly. The steering wheel needs to be turned 45 degrees in either direction to access them. The bolts aren't especially long, but they are on pretty tight. I'd recommend using an allen type T30 wrench and a pair of pliers to turn it. If you take a look at the first picture in this thread: http://forums.corvetteforum.com/c5-t...brane-fix.html you can see where the yellow connector would plug into the back of the airbag (it's the hole with the green plastic in it right in the center of the metal disk)... That's the one I'd check out. It's also worth checking out the airbag wiring harness at the base of the steering column, don't quote me on this, but I think it's the one furthest to the right if you're sitting in the car facing the steering wheel.

Again, most people recommend taking the car to the mechanic for airbag related stuff. I have a friend who's a mechanic and has been around airbags a bit so I just invited him over to give me a hand, otherwise I probably would have gone to the shop for this...

If I were you, I'd start by checking your #16 fuse in the floorboard box then the wiring harnesses near the base of the steering column behind the knee bolster...

sam-garcia

Thank you, this is the confirmation I needed, will be doing this pretty soon.

sam-garcia

I am replacing the clockspring this weekend. Does anyone have a write up for a C5?...

mike venth

I did mine, not real hard to do.....
BUT>>>> before you start
1. disconnect your BATTERY 1st (A MUST)
2. remove the air bag fuses (A MUST)
You do not want to set off your air bag!!!
i also found some info at these CF SITE
I believe the hardest part is removing the steering wheel, mark it so it goes back in the
exact same place.......

https://www.corvetteforum.com/forums...rchid=47608247

contact Gene @ CULTRAG Performance LLC. 484-334-8833