GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 Yukon - 2WD 🢒 Brakes 🢒 Antilock Brake System 🢒 DTC C0283 Traction Switch Shorted to Ground

Circuit Description

When the traction assist switch is pressed, the switch momentarily grounds the traction control switch signal circuit. The EBCM then turns the traction control system on or off.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC
    • The traction assist switch is detected as pressed for 10 seconds.
    • The criteria for changing the status of the traction control automatic engagement feature are not being met.

Action Taken When the DTC Sets
    • The TRACTION OFF indicator is commanded on.
    • The Traction Control is disabled for as long as the malfunction is present.

Conditions for Clearing the DTC
    • Repair the condition(s) responsible for setting the DTC.
    • Use a scan tool in order to clear the DTC.

Diagnostic Aids

Damaged insulation on the traction control switch signal circuit wiring may allow the wiring to contact ground and set DTC C0283 intermittently. The DTC may also set if the procedure to program the traction control automatic engagement feature is performed incorrectly.

Test Description

The number below refers to the step number on the diagnostic table.

  1. This step tests for a shorted traction assist switch.

Step

Action

Value(s)

Yes

No

Schematic Reference: Antilock Brake System Schematics

1

Did you perform the ABS Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check

2
  1. Use a scan tool in order to clear the DTC(s).
  2. Turn the ignition OFF.
  3. Turn the ignition ON and wait approximately 20 seconds.

Does the DTC set?

--

Go to Step 3

Go to diagnostic Aids

3
    • Inspect the traction assist switch for signs of physical damage.
    • Press the switch several times and observe the switch actuation.

Is the switch free of damage and able to mechanically actuate without binding?

--

Go to Step 4

Go to Step 9

4

  1. Use the scan tool in order to clear the DTC.
  2. Turn the ignition OFF.
  3. Disconnect the traction assist switch harness connector.
  4. Turn the ignition ON and wait approximately 20 seconds.

Does the DTC set?

--

Go to Step 5

Go to Step 8

5

Test the traction control switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 10

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 10

Go to Step 7

7

Important: Perform the Tire Size Calibration procedure.

Replace the EBCM. Refer to Electronic Brake Control Module Replacement .

Did you complete the replacement?

--

Go to Step 10

--

8

Inspect for poor connections at the harness connector of the traction assist 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 10

Go to Step 9

9

Replace the traction assist switch. Refer to Traction Assist Switch Replacement .

Did you complete the replacement?

--

Go to Step 10

--

10
  1. Use the scan tool in order to clear the DTC.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC set?

--

Go to Step 3

System OK