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.
DTC P1445 (62): Bypass Contactor Problem: General Description
The high voltage contactor between the battery module and the motor power inverter (MPI) module is turned on to activate the integrated motor assist (IMA) system after turning the ignition switch on. Before turning the high voltage contactor on, the bypass contactor is turned on and the motor drive module (MDM) condenser is charged gradually by current limited by the bypass resistor. When the difference between the voltage on the MPI module side and the battery module side is within a set range, the high voltage contactor is turned on, then the bypass contactor is turned off.
If the difference between the voltage on the MPI module side and the battery module side is out of a set range for a specified time after the bypass contactor is turned on, a malfunction is detected and a DTC is stored.
| Execution | Once per driving cycle |
| Sequence | None |
| Duration | 2 seconds or more |
| DTC Type | One drive cycle, MIL ON, IMA system indicator ON |
| Condition | Minimum | Maximum |
|---|---|---|
| MCM power-supply voltage | 10.5 V | - |
| MPI module voltage (Ignition switch ON) | - | 240 V |
| Motor speed (Ignition switch ON) | - | 1,000 rpm |
| Ignition switch | ON | |
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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.