C2300 Toyota Prius
The C2300 code in a Toyota Prius refers to an issue with the Actuator System Malfunction in the shift control system. This typically points to problems with the shift control actuator assembly, wiring, or related components.
Possible Causes:
- 12V Auxiliary Battery: A weak or failing 12V battery can cause C2300 and related errors such as P3102. Ensure the auxiliary battery is properly charged or replaced if necessary.
- Shift Control Actuator Assembly: This component, which engages the parking lock system, may malfunction due to wear, damage, or internal failure
- Wiring and Connectors: Check for corrosion, loose, or damaged wiring between the shift actuator and transmission control ECU
- Fuse or Relays: Faulty P CON MTR fuse or parking lock control relay can also trigger the issue
Troubleshooting Steps:
- Check the 12V Battery: Measure the voltage and replace it if it is below specification.
- Inspect Shift Actuator Connections: Disconnect and inspect the actuator and ECU connectors for damage or corrosion.
- Test Shift Actuator: Measure resistance and voltage per Toyota’s diagnostic instructions for terminals in the shift control system【343†source】.
- Scan for Additional Codes: Often, other related codes (e.g., P3102) provide additional context for the malfunction【344†source】.
Action:
- Replace the 12V auxiliary battery first, as it is the most common culprit.
- If the battery is fine, consult a professional to test the shift control actuator assembly and inspect wiring for further diagnosis.
If left unresolved, the car may fail to shift out of park or exhibit parking lock malfunctions.