Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 5
This step simulates pressing and releasing a properly functioning traction control switch.
- 6
The traction control switch may be damaged if the traction control switch signal circuit is shorted to voltage.
- 7
This step tests if the ignition 1 voltage circuit can supply adequate power to the traction control switch.
- 8
This step tests if the EBCM is commanding the traction off indicator OFF.
Traction Off Indicator Inoperative
| Step | Action | 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 - ABS |
| 2 |
|
Go to Step 3 | Go to Step 7 |
| 3 | Press and release the traction control switch. Does the traction off indicator turn ON? |
Go to Diagnostic Aids | Go to Step 4 |
| 4 |
|
Go to Step 13 | Go to Step 5 |
| 5 |
IMPORTANT:
Do not disconnect the traction control switch harness connector during this step.
|
Go to Step 12 | Go to Step 6 |
| 6 | Test the traction control switch signal circuit for a short to voltage. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 13 |
| 7 |
IMPORTANT:
If the ignition is ON for more than 10 seconds, the EBCM sets DTC C0283.
|
Go to Step 8 | Go to Step 14 |
| 8 |
|
Go to Step 13 | Go to Step 9 |
| 9 | Test the service traction control signal circuit for a short to ground or a short to voltage. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 10 |
| 10 | Test the ground circuit of the traction control switch for an open. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 11 |
| 11 | 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 15 | Go to Step 12 |
| 12 | Replace the traction control switch. Refer to Electronic Traction Control Switch Replacement . Did you complete the replacement? |
Go to Step 15 | - |
| 13 |
IMPORTANT:
Replace the EBCM. Refer to Electronic Brake Control Module Replacement .Did you complete the replacement?Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure. |
Go to Step 15 | - |
| 14 | Repair the high resistance in the ignition 1 voltage circuit. Refer to Circuit Testing
, and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 15 | - |
| 15 | Press and release the traction control switch several times. Does the traction off indicator turn ON and OFF each time the switch is pressed? |
System OK | Go to Step 2 |