Circuit Description
Traction control is simultaneously controlled by the electronic brake and traction
control module (EBTCM) and the powertrain control module (PCM)/engine control module
(ECM). The EBTCM sends a requested torque message via a pulse width modulated (PWM)
signal to the PCM/ECM requesting a desired engine torque level for proper traction
control system operation. The EBTCM supplies the pull up voltage.
DTC Parameters
DTC C0241 will set if the following conditions exist:
| • | There is an interruption in the requested torque circuit between the EBTCM
and PCM/ECM. |
| • | A defective requested torque signal is detected by the PCM/ECM, PWM signal
outside the normal range (95%-97%) is sent back to the EBTCM via the delivered torque
circuit. |
| • | The EBTCM receives an out of range signal for 30 milliseconds continuously. |
| • | Ignition voltage is present and the EBTCM detects engine RPM greater than
480. |
| • | When this DTC sets, the EBTCM will disable traction control. |
Diagnostic Aids
Possible causes for DTC C0241 to set:
| • | Open in the requested torque circuit |
| • | Requested torque circuit shorted to ground or voltage |
| • | Requested torque circuit has a wiring problem, terminal corrosion, or
poor connections |
| • | PCM/ECM not receiving information from EBTCM |
