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.
Charge Mode
The BCM will enter Charge Mode when ever one of the following conditions are met:
- The headlamps are ON, low or high beam.
- The wipers are ON for more than 3 seconds.
- The electric cooling fans are on high speed for more than 1 minute and either fluid head pressure is greater than 1600 kpa (232 PSI) or engine coolant temperature is greater than 105°C (221°F).
- The rear defogger is ON for more than 1 minute.
- The HVAC front blowers are on high speed for more than 1 minute and estimated battery temperature is greater than 32°C (89°F).
- The estimated battery temperature is less than 0°C (32°F).
- Battery SOC is less than 80 percent.
Once one of these conditions is met, the generator battery control module will set the targeted generator output voltage to a charging voltage between 13.9 volts and 15.5 volts, depending on battery SOC and estimated battery temperature.
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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.