C1276 h
Thread Starter
Racer
Joined: Jun 2005
Posts: 389
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C1276 h
So I had my EBCM fixed by brandon at abs fixer the other week - everything works great but after clearing out the codes when i got it back this code popped up. First of all it is H so does that mean the code is currently not being triggered? Also is this code related to emmissions? I need to get the car through emmissions asap. Thank you.
Safety Car
Joined: Jan 2001
Posts: 4,386
Likes: 689
From: Boise ID
If the car is turned off it will be an H. Clear it and see if it comes back. The C1276 is not related to emmissions.
DTC C1276 Delivered Torque Signal Circuit Malfunction
Circuit Description
Traction Control is simultaneously controlled by the EBCM and the PCM. The PCM sends a DELIVERED TORQUE message via a Pulse Width Modulated (PWM) signal to the EBCM confirming the delivered torque level for proper Traction Control system operation. The EBCM supplies the pull up voltage.
Conditions for Setting the DTC
DTC C1276 can be set anytime when ignition voltage is present. A malfunction exists if the PWM signal is out of range or no signal is received for a period of 7 seconds.
Action Taken When the DTC Sets
TCS/Active Handling (if equipped with RPO JL4) are disabled.
Indicators that turn on: Car Icon (TCS indicator)
Messages displayed on the DIC: Service Traction System Service Active HNDLG (if equipped with RPO JL4)
Conditions for Clearing the DTC
Condition for DTC is no longer present and scan tool clear DTC function is used.
Fifty ignition cycles have passed with no DTCs detected.
Diagnostic Aids
It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
If an intermittent malfunction exists refer to Testing for Intermittent and Poor Connections in Wiring Systems.
Possible causes for DTC C1276 to set:
Open in CKT 464.
CKT 464 shorted to ground or voltage.
Communication frequency problem.
Communication duty cycle problem.
CKT 464 has a wiring problem, terminal corrosion, or poor connections.
EBCM not receiving information from the PCM.
DTC C1276 Delivered Torque Signal Circuit Malfunction
Circuit Description
Traction Control is simultaneously controlled by the EBCM and the PCM. The PCM sends a DELIVERED TORQUE message via a Pulse Width Modulated (PWM) signal to the EBCM confirming the delivered torque level for proper Traction Control system operation. The EBCM supplies the pull up voltage.
Conditions for Setting the DTC
DTC C1276 can be set anytime when ignition voltage is present. A malfunction exists if the PWM signal is out of range or no signal is received for a period of 7 seconds.
Action Taken When the DTC Sets
TCS/Active Handling (if equipped with RPO JL4) are disabled.
Indicators that turn on: Car Icon (TCS indicator)
Messages displayed on the DIC: Service Traction System Service Active HNDLG (if equipped with RPO JL4)
Conditions for Clearing the DTC
Condition for DTC is no longer present and scan tool clear DTC function is used.
Fifty ignition cycles have passed with no DTCs detected.
Diagnostic Aids
It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
If an intermittent malfunction exists refer to Testing for Intermittent and Poor Connections in Wiring Systems.
Possible causes for DTC C1276 to set:
Open in CKT 464.
CKT 464 shorted to ground or voltage.
Communication frequency problem.
Communication duty cycle problem.
CKT 464 has a wiring problem, terminal corrosion, or poor connections.
EBCM not receiving information from the PCM.
