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.
Diagnosis And Testing - Pedestrian Protection System
The hard wired circuits between modules and components related to the Electronic Pedestrian Protection (EPP) system (also known as the PedPro or the Active Hood System) may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin out information and location views for the various wire harness connectors, splices and grounds.
However, conventional diagnostic methods will not prove conclusive in the diagnosis of the EPP system or the electronic controls and communication between other modules and devices that provide features of the EPP system. The most reliable, efficient and accurate means to diagnose the EPP system or the electronic controls and communication related to EPP system operation, as well as the retrieval or erasure of a Diagnostic Trouble Code (DTC) requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.
In addition to a diagnostic scan tool that contains the latest version of the proper diagnostic software, certain diagnostic procedures for the EPP system may require the use of the Supplemental Restraint System (SRS) Load Tool special tool along with the appropriate Load Tool Jumpers and Adapters. Refer to the appropriate diagnostic information.
To avoid serious or fatal injury on vehicles equipped with the Electronic Pedestrian Protection (EPP) system, disable the system before attempting any EPP system component diagnosis or service. With the ignition switch in the OFF position, disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the EPP system. Failure to take the proper precautions could result in accidental active hood hinge actuator deployment.
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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.