P3147 / INF239

DTC P3147-239 Transmission Malfunction
DTC P3147-241 Transmission Malfunction

DESCRIPTION

DTC Detection Condition:

The hybrid vehicle transmission assembly consists of the power split planetary gear unit, MG1, MG2, and the 2-stage motor speed reduction planetary gear unit. The power split planetary gear unit uses a planetary gear to split engine output in accordance with driving requests while the vehicle is driven or the HV battery is charged. MG2 assists engine output while increasing vehicle drive force. MG2 also converts the energy, which would otherwise be consumed in the form of heat during normal braking, into electrical energy. This recovered energy is put back into the HV battery to effect regenerative braking. The 2-stage motor speed reduction planetary gear unit reduces the output of MG2 in two stages, depending on vehicle speed. MG1 generates power, which is used for charging the HV battery or driving MG2. This regulation of the generation of electricity is used to control MG1 speed. In addition, MG1 is used as a starter motor to start the engine. The transmission input damper absorbs shock generated when the drive force from the engine is transmitted.

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INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.