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.
Circuit/System Description
The motor control module and the hybrid powertrain control module are all internal to the starter/generator control module. The hybrid powertrain control module sends out diagnostic trouble code information to other control modules regarding the motor control module. All circuits to the hybrid powertrain control module and motor control module are also internal to the starter/generator control module and replaced as a single component.
Communication diagnostics for the serial data, including control module power and ground as well as the wakeup circuits for motor control module and the hybrid powertrain control module are all diagnosed from external sources only to the starter/generator control module connector because any circuit fault condition within the starter/generator control module will cause a complete replacement.
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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.