Diagnosis Description

B2554 ACC power supply circuit monitors the following 2 signals.

• Though the power supply switching control to ACC position by push-button ignition switch operation is performed normally, if there is no ACC power supply input to the Intelligent Key unit, it judges that it is the malfunction and displays the DTC (Diagnostic Trouble Code)
• When performing the power supply switching control to ACC position by push-button ignition switch operation, if the power supply position switching cannot be performed because the wake-up signal is not entered into PDU (Power Distribution Unit), it judges that it is the malfunction and displays the DTC (Diagnostic Trouble Code)