With RPO JL4

Antilock Brake System

Diagnostic Information and Procedures

DTC C0283 (W/JL4)

Circuit Description

The traction control switch is a momentary-contact, normally open switch that can be used to disable the engine torque management function of the TCS. On two-wheel drive or all wheel drive vehicles, the traction control switch is directly monitored by the EBCM. On four wheel drive vehicles equipped with selectable 4 LO, the traction control switch is monitored by the transfer case shift control module (TCSCM), which sends the traction control switch status information to the EBCM on the serial data link. Each time the traction control switch is pressed, the VSES and TCS enabled/disabled status changes. When TCS is disabled, the EBCM sends serial data messages to the IPC to turn ON the traction off indicator and display the stability system disabled message.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

Two wheel drive or all wheel drive vehicles

The EBCM detects low voltage on the traction control switch signal circuit for 8 seconds.

Four wheel drive vehicles with selectable 4 LO

The EBCM receives a serial data message from the TCSCM indicating that the VSES mode/transfer case shift control switch is detected as failed. The
TCSCM sends this message 60 seconds after the TCSCM sets DTC B2725.

Action Taken When the DTC Sets

- The EBCM disables VSES and engine torque management.
- 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 number below refers to the step number on the diagnostic table.
4. This step tests the traction control switch circuitry. If the fuse opens when you perform this test, the traction control switch signal circuit is shorted to ground.

DTC C0283 (W/JL4) Steps 1 - 3:

DTC C0283 (W/JL4) Continued Steps 4 - 11: