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.
Driving Pattern
When the HDS is used:
- Connect the HDS, and start the engine.
- Remove the IPU lid.
- Request the battery module fan drive on the HDS.
- Verify that the battery module fan is actually running.
When the HDS is not used:
- Remove the IPU lid.
- Reset the BCM. (Disconnect the 12 V battery terminal once and reconnect it.)
- Remove the No. 15 EPS (40 A) fuse from the under-hood fuse/relay box.
- Hold the engine at a speed between 3,500 - 4,000 rpm without load (in Park or neutral), and wait until 19 segments of the indicator on the IMA battery charge gauge are indicated.
- Turn off the ignition switch.
- Repeat steps 2 - 5 five times. (Increase the battery module temperature.)
- Verify that the battery module fan drive is running when the engine is idling.
- Reinstall the No. 15 EPS (40 A) fuse and IPU lid.
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.
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