Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Traction Control System
When drive wheel slip is noted while brake is not applied, EBCM will enter traction control mode.
First, EBCM requests PCM to reduce amount of torque to drive wheels via requested torque signal circuit. PCM reduces torque to drive wheels by retarding spark timing and turning off fuel injectors. PCM reports amount torque delivered to drive wheels via delivered torque signal circuit.
If engine torque reduction does not eliminate drive wheel slip, EBCM will actively apply drive wheel brakes. During traction control braking, hydraulic pressure in each drive wheel circuit is controlled to prevent drive wheels from slipping. Master cylinder isolation valve closes in order to isolate master cylinder from rest of hydraulic system. Prime valve then opens to allow pump to accumulate brake fluid to build hydraulic pressure for braking. Drive wheel inlet and outlet solenoid valves then open and close in order to perform pressure hold, pressure increase and pressure decrease.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.