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.
Description & Operation
Vehicle has 2 module communications networks. Both networks can be accessed by using a New Generation Star (NGS) tester connected to Data Link Connector (DLC).
Standard Corporate Protocol (SCP) network consists of powertrain control module, electronic automatic temperature control module (if equipped) and hybrid electronic cluster interconnected by a pair of twisted wires (bus + and bus -). SCP network allows inter-module communication. SCP network is robust and will continue to function even if one bus wire is open, shorted to ground or shorted to power.
International Standards Organization (ISO) 9141 network consists of parking aid module, restraint control module, generic electronic module, driver's seat module (vehicles with memory seat), central security module, 4-wheel anti-lock brake system module and air suspension control module interconnected by a single wire. If that wire is shorted to ground, or power, network will fail to communicate. ISO 9141 network does not permit inter-module communication.
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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.
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