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.
Operating Conditions: Notes
- Engine start:
The IMA system drives the IMA motor and starts the engine during normal starts and when re-starting from an idle stop.
The IMA motor is linked directly to the engine crankshaft.
- Start running:
The IMA motor assists the engine.
- Slow acceleration:
Runs only with the engine.
- Low speed cruise:
At a constant speed of about 25 mph (40 km/h) with light load, all engine cylinders are deactivated, and the vehicle runs only with the IMA motor. When the state-of-charge (SOC) drops, the engine starts and the IMA motor begins to charge the battery module.
- Acceleration:
The IMA motor assists the engine.
- High acceleration:
The IMA motor assists the engine.
- High speed cruise:
Runs only with the engine. When the state-of-charge drops, the IMA motor begins to charge the battery module.
- Deceleration:
All engine cylinders are deactivated, and the IMA motor captures the deceleration energy and charges the battery module.
- Stop:
When conditions are satisfied, the PCM stops the engine automatically (auto stop).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.