C2304 — Open Or Short Circuit In U Phase

The shift control actuator assy consists of the parking lock motor and the rotation angle sensor. Transmission control ECU receives a P position switch signal from the hybrid vehicle control ECU and activates the parking lock motor by controlling current, causing the parking lock mechanism to switch. The transmission control ECU outputs this DTC when it detects a malfunction in the parking lock motor system.

DTC C2304 Detecting Condition

• Power switch on (IG). (Battery voltage is 8 V or more)
• Voltage of transmission control ECU terminal MUA is 6 V or less for 1 sec. or more

Trouble Area

• Shift control actuator assy
• Wire harness or connector
• Transmission control ECU assy
• Transaxle parking lock control relay