Scan code C1254 on 2003

[Frederick W.]

Is there some place to find out what the scan code stands for with out the dealer or being a member on a 2003 C5 . The track light and service soon light has been on for about 2 months with out any success in removing it. Corvette Forum said that the C5s were noted for the ignition switch. It has been changed with out helping. Thank You Fred

[Keith B.]

Re: Scan code

Most chain auto parts store will plug your car into a scanner to read the codes. If not you will have to take it to a trusted shop and have them do it.

[Frederick W.]

Scan code meaning

Thank You Keith I have the code number C1254 and I see now that it stands for Abnormal Shutdown detected. It had shut down abruptly. I found it to be low current to the fuel pump, which inturn traced back to dirty contacts in the ignition switch. Car runs good. The scanner will not clear the C1254 code. The traction light and service soon will not clear. There is also a code C1248 DRP Disabled These two codes is what I need to find out what they mean as to fix them so to get the codes to clear. Thank You Fred

[Keith B.]

Re: Scan code meaning

my bet is you need a Yaw sensor

AIRTEX/WELLS 5S8015

[Frank E.]

Re: Scan code meaning

Check out this link.......

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwjQ2M-i3cLWAhUD5yYKHY-FDFcQFggwMAI&url=https%3A%2F%2Fwww.justanswer.com%2Fchevy%2F0xkhz-diagnostic-repair-chassis-codes-c1254-c1298.html&usg=AFQjCNEPZf9UTcCWR2Yq-hM3eLc5ucCtMQ

Expert: Mark Bisig replied 9 years ago.
HelloCustomer Just what are you looking for dia charts ?
Ask Your Own Chevy Question
Customer: replied 9 years ago.
Reply to Mark Bisig's Post: Diagnostic charts would be great.
Expert: Mark Bisig replied 9 years ago.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern: This is a bulletin for code C1298


A tech may have difficulty finding information on DTC C1298. The information is not in available service information.
Recommendation/Instructions:


The DTC C1298 indicates either the EBCM is not transmitting information to the PCM or the PCM is not receiving information from the EBCM. The TAC cases indicate that the EBCM grounds or applied ignition voltage is the most common cause of the code setting, outside of an EBCM failure. The particular grounds in question are G102, G103, and G105. The applied ignition voltage is fed by the ignition switch, circuit 3, through the ABS/EVO/IGN 15 amp fuse in the underhood fuse block to pin A11 of the EBCM on circuit 139.
Checking and qualifying these circuits should lead the technician to the cause of the DTC setting.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.


DTC C1254
Circuit Description
The microprocessor contains a data storage area, keep alive memory, which can save pertinent data when the ignition is turned OFF. The keep alive memory (KAM) data is lost if battery power or module ground is removed from the module. The KAM area is an integral part of the microprocessor and cannot be serviced separately.
Conditions for Running the DTC
The ABS conditions and the braking conditions are normal.
Conditions for Setting the DTC
The microprocessor calculates a checksum on those areas of memory that hold critical operation data. This is done at a regular interval and is called the periodic checksum. The microprocessor also calculates a checksum on these memory locations when ever new data is written to them. This is called the running checksum.
To check the keep alive memory (KAM), the microprocessor compares the periodic checksum to the running checksum. If they do not match, the microprocessor sets the DTC.
Action Taken When the DTC Sets
If equipped, the following actions occur:
The EBCM disables the DRP/ABS/TCS for the duration of the ignition cycle.
The EBCM disables the variable effort steering (VES) for the duration of the ignition cycle.
The ABS indicator turns ON.
The Traction Off indicator turns ON.
The EBCM will not send serial data messages.
The EBCM will not send the requested torque output to the PCM.
Conditions for Clearing the DTC
The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected inXXXXXcycles.
Diagnostic Aids
Possible causes of this DTC are the following conditions:
A loss of battery ground
A disconnected battery
A running reset A running reset is detected when the keep alive memory check sum is not updated properly.
A sudden drop in the system voltage to less than 5 volts
Long extended engine cranks that cause the battery voltage to drop
Poor power or ground connections
An internal EBCM malfunction
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Tests for an open in the ground circuits of the body control module.
4. Verifies the proper operation of the charging system.
6. Determines whether the DTC resets.
Step
Action
Yes
No
Schematic Reference: ABS Schematics
Connector End View Reference: ABS Connector End Views
1
Did you perform the ABS Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - ABS
2
Turn OFF the ignition.
Important
Removing battery voltage or ground from the EBCM will result in the following conditions:
Loss of the TIM learned tire inflation configuration parameters in the EBCM
The EBCM sets DTC C1245
When the diagnosis is complete, inspect the tire pressures and perform the TIM reset. Refer to Tire Pressure Monitor Reset Procedure in Tire Pressure Monitoring.
Disconnect the EBCM harness connector.
Install the J 39700 universal breakout box using the J 39700-99 breakout box adapter to the EBCM harness connector only.
Test the module ground circuit of the EBCM for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 8
Go to Step 3
3
Has the battery been disconnected recently?
Go to Step 8
Go to Step 4
4
Test the charging system. Refer to Diagnostic System Check - Engine Electrical in Engine Electrical.
Did you find and correct the condition?
Go to Step 8
Go to Step 5
5
Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 8
Go to Step 6
6
Use the scan tool in order to clear the DTCs.
With the scan tool, perform the Automated Test.
Does the DTC reset?
Go to Step 7
Go to Testing for Intermittent and Poor Connections in Wiring Systems
7
Replace the EBCM. Refer to Electronic Brake Control Module (EBCM) Replacement .
Did you complete the repair?
Go to Step 8
--
8
Use the scan tool in order to clear the DTCs.
With the scan tool, perform the Automated Test.
Does the DTC reset?



Mark Bisig
Mark Bisig, Auto Service Technician
Category: Chevy
Satisfied Customers: 158
Experience: 28 years at a Chevrolet Dealer, ASE Master Technician, GM Master Technician
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[Don H.]

Re: Scan code meaning

Whoa!
Do they give you an honorary engineering degree when you buy one of those cars?

[Frank E.]

Re: Scan code meaning

They should...... A little more involved than working on my '66

[Carl N.]

Re: Scan code C1254 on 2003

You can access all the codes thru the DIC on the dashboard. No scanner required ! Simply Google the code you throw for solution. Look at the C5 section of the Corvette Forum there is a sticky explaining how to pull the codes and what each means. I wish all my car had this feature. My '98 is almost 20 y/o and for the most part as easy to service as the C3's and C4's which require scanners.

[Frederick W.]

2003 code

Is there a place or link to find out what needs to be repair for the code c1254 which is abnormal shut down detected. The problem had been repaired. The c1254 and c1248 keep showing up as current. The service engine soon and traction display in the instrument display can not be deleted with a scanner. I do know that there is on board scanner. I do not want to buy the service manual as it is over $300.00. To find out what needs to be fixed with these two codes.

[Rick A.]

Re: 2003 code

the following link is a list of ALL "known" codes to have been thrown for C5's - and the following information is provided to try and reset the codes

Turn the key to the ON position, but don't start the engine. Clear any present messages by pressing the RESET button. Hold the OPTIONS button down, and press the FUEL button 4 times. This will get you into the CODES section of the DIC. The computer will automatically display all the codes your car has created. It will cycle through each code every 3 seconds. Any code that ends in H is a history code (something that has occured in the past) but is fine now. Once the computer has finished going through all of it's codes, press RESET to enter Manual Configuration mode. It should start with a module and show "NO CODES" or "# CODES".

To optionally 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 in this paragraph 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.

http://www.stengel.net/diccodes.htm