Description of On-Board Diagnostics

DIAGNOSIS SYSTEM




- The HV Battery ECU has a self-diagnosis system by which malfunction in the computer itself or in Hybrid System is detected and the master warning light in the combination meter and the Hybrid system warning light in the multi-information display lights up.




- To check the Diagnostic Trouble Codes (DTC), connect the TOYOTA hand-held tester to the Data Link Connector 3 (DLC3) on the vehicle. The TOYOTA hand-held tester also enables you to erase the DTC and check freeze frame data and various forms of THS data.

- Freeze frame data:
Freeze frame data records the battery condition when a malfunction is detected.
When troubleshooting, this is useful for knowing the battery condition.