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.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1479 (ANTILOCK BRAKE SYSTEM, TRACTION CONTROL SYSTEM & STABILITY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL OUTPUT CONTROLS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Scan Tool Output Controls
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Scan Tool Output Controls
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Electronic Brake Control Module (EBCM)
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| Automated Bleed | - | Used in order to bleed the ABS hydraulics. Refer to ABS Automated Bleed Procedure . |
| Automated Test | - | Cycles each solenoid valve and the pump motor in order to verify component operation. This test is identical to the Initialization Sequence. If a malfunction is detected, the EBCM will set the appropriate DTCs. The DTCs will be displayed upon completion of the test. |
| LF Inlet Valve Solenoid | Solenoid Test | Commands the solenoid ON and OFF. |
| LF Outlet Valve Solenoid | Solenoid Test | Commands the solenoid ON and OFF. |
| LR Inlet Valve Solenoid | Solenoid Test | Commands the solenoid ON and OFF. |
| LR Outlet Valve Solenoid | Solenoid Test | Commands the solenoid ON and OFF. |
| Pump Motor Test | - | Commands the pump motor ON and OFF. |
| RF Inlet Valve Solenoid | Solenoid Test | Commands the solenoid ON and OFF. |
| RF Outlet Valve Solenoid | Solenoid Test | Commands the solenoid ON and OFF. |
| RR Inlet Valve Solenoid | Solenoid Test | Commands the solenoid ON and OFF. |
| RR Outlet Valve Solenoid | Solenoid Test | Commands the solenoid ON and OFF. |
| Steering Position Sensor Test | - | Tests the steering wheel position sensor (SWPS) ability to provide a valid input. |
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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.