DTC C0283 W/O JL4
Circuit Description
The traction control switch is a momentary-contact, normally-open switch that can be used to disable the traction control system (TCS). Each time the traction control switch is pressed, the TCS enabled/disabled status changes. When TCS is disabled, the electronic brake control module (EBCM) illuminates the traction off indicator by opening the service traction control signal circuit.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The EBCM detects low voltage on the traction control switch signal circuit for 10 seconds.
Action Taken When the DTC Sets
If equipped, the following actions occur:
| • | The EBCM disables the TCS. |
| • | The traction off indicator turns ON. |
Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views | |||
1 | Did you perform the antilock brake system (ABS) Diagnostic System Check? | Go to Step 2 | |
2 |
Does the DTC set? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 8 |
Does the DTC set? | Go to Step 5 | Go to Step 9 | |
5 | Test the traction control switch signal circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the electronic brake control module (EBCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
7 |
Important: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure. Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? | Go to Step 11 | -- |
8 | Repair the open in the ignition 1 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 11 | -- |
9 | Inspect for poor connections at the harness connector of the traction control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
10 | Replace the traction control switch. Refer to Electronic Traction Control Switch Replacement . Did you complete the replacement? | Go to Step 11 | -- |
11 |
Does the DTC reset? | Go to Step 3 | System OK |
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 contol 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 DTCs function.
Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to Testing for Electrical Intermittents , Testing for Intermittent Conditions 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.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views | |||
1 | Did you perform the ABS Diagnostic System Check? | Go to Step 2 | |
2 |
Does the DTC set? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 8 |
Does the DTC set? | Go to Step 5 | Go to Step 9 | |
5 | Test the traction control switch signal circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
7 |
Important: Following EBCM replacement, perform the set-up procedure for the EBCM and perform the Yaw Rate Reference Table Reset Procedure. Use the scan tool to perform the Tire Size Calibration procedure. Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? | Go to Step 11 | -- |
8 | Repair the open in the ignition 3 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 11 | -- |
9 | Inspect for poor connections at the harness connector of the traction control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
10 | Replace the traction control switch. Refer to Electronic Traction Control Switch Replacement . Did you complete the replacement? | Go to Step 11 | -- |
11 |
Does the DTC reset? | Go to Step 3 | System OK |
