The ignition 3 voltage circuit supplies 12 volts to the traction control switch. The electronic brake control module (EBCM) turns OFF the traction off indicator by applying ground to the service traction control signal circuit.
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Antilock Brake System Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Does the traction off indicator illuminate for 3 seconds and then turn OFF? | Go to Diagnostic Aids | Go to Step 3 |
3 | Observe the Traction Off Lamp Command on the scan tool. Does the scan tool display Traction Off Lamp Command-On? | Go to Step 9 | Go to Step 4 |
Does the traction off indicator turn OFF? | Go to Step 8 | Go to Step 5 | |
5 | Test the service traction control signal circuit for an open or a short to voltage. Refer to Circuit Testing and Wiring Repairs . 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 traction control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 10 | Go to Step 7 |
7 | Replace the traction control switch. Refer to Electronic Traction Control Switch Replacement . Did you complete the replacement? | Go to Step 10 | -- |
8 | Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
9 | Replace the EBCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 10 | -- |
10 |
Does the traction off indicator illuminate for 3 seconds and then turn OFF? | System OK | Go to Step 3 |