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 MANUALSJEEP2009WRANGLER RUBICON, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEM - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGC107C-BRAKE PEDAL SWITCH 1/2 STUCKDIAGNOSTIC TEST
2009 Jeep Wrangler Rubicon, Standard
Diagnostic Test
2009 Jeep Wrangler Rubicon, StandardSECTION Diagnostic Test
- POWERTRAIN CONTROL MODULE (PCM) or ENGINE CONTROL MODULE (ECM) DTCS PRESENT
- With the scan tool, read ECM/PCM Brake DTCs.
Are there any ECM/PCM Brake DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing for gas engine applications or .
No
- Using the schematics as a guide, check the ECM/PCM terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits.
- Perform the appropriate VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure for gas engine applications or DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure for diesel engine applications.
- With the scan tool, read ECM/PCM Brake DTCs.
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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.