Power Up Sequence

The powertrain control module (PCM) must conduct a power-up sequence every time the key is turned from the OFF to the START position. The power-up sequence is carried out only with the electronically controlled continuously variable transaxle (CVT) gear selector in the PARK position. During the power-up sequence the PCM:

• initializes and begins CAN communications with the transaxle control module (TCM) and the traction battery control module (TBCM).
• checks for TCM error status.
• requests the TBCM to close the high voltage contactors.
• enables the DC/DC converter.
• starts the internal combustion engine.

If the malfunction is detected during the power up sequence, the PCM may initiate LOS mode and store diagnostic trouble codes (DTCs).