With RPO JL4

Antilock Brake System

Diagnostic Information and Procedures

DTC C0244 (W/JL4)

Circuit Description

The EBCM supplies approximately 12 volts through an internal resistor to the powertrain control module (PCM) on the delivered torque signal circuit. The PCM toggles this voltage to ground in order to create the delivered torque signal at the EBCM. A signal with a frequency of 128 Hz +/- 5 % and a duty cycle of 25 - 95 % is a valid delivered torque signal. The percentage of duty cycle is proportionate to the percentage of delivered engine torque.

Conditions for Running the DTC

- The ignition is ON.
- The engine is running at a speed greater than 450 RPM for 1 second.

Conditions for Setting the DTC

The EBCM receives an invalid delivered torque signal for 300 milliseconds.

Action Taken When the DTC Sets

- The EBCM disables the VSES.
- Engine torque reduction is disabled.
- The traction off indicator turns ON.
- The message center displays the service stability system message.

Conditions for Clearing the DTC

The Conditions for Setting the DTC are no longer present and you use the scan tool Clear DTC's function.

Diagnostic Aids

Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to Testing for Electrical Intermittents, Testing for Intermittent and Poor Connections, Wiring Repairs and Connector Repairs in Wiring Systems.

Test Description

The numbers below refer to the step numbers on the diagnostic table.
3. This step tests for voltage supplied to the PCM from the EBCM.
4. This step tests for a shorted resistor in the EBCM or a short to voltage within the circuit, by verifying that a large voltage drop occurs in the circuit when the test lamp is placed in parallel with the DMM. The PCM may be damaged if either of these conditions is present.

DTC C0244 (W/JL4) Steps 1 - 7:

DTC C0244 (W/JL4) Continued Steps 8 - 13: