Diagnosis

INSPECT DIAGNOSIS

a. Check the auxiliary battery.

1. Measure the voltage of the auxiliary battery.
Voltage: 10 - 15V

2. Inspect the auxiliary battery, fuses, fusible links, wiring harness, connectors and ground.




b. Check the DTC.
1. Prepare a TOYOTA hand-held tester.
2. Connect the TOYOTA hand-held tester to the DLC3.
3. Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
4. Use the TOYOTA hand-held tester to check the DTC, information code and freeze frame data and note them down. (For operating instructions, see the TOYOTA hand-held tester operator's manual).

HINT:
- For one DTC, the HV diagnosis system can memorize more than one information code and freeze frame data corresponding to them. Therefore, when troubleshooting, check all of the information codes, record the freeze frame data and then start inspection according to the procedures of "Circuit Inspection".
- The HV ECU is communicating with each ECU of the engine brake, HV battery and EMPS. So, if a warning is output from the HV control system, check and record DTCs of all ECUs. (See tables)

5. See Trouble Code Descriptions to confirm details of the DTC.




HV ECU-DTC & Information #

Part 1:

Part 2:

HV ECU-Information & Freezed frame data

Part 1:

Part 2:

Part 3:

Part 4:

HV ECU-Operation History Data




Battery ECU




Engine ECU




EMPS ECU




c. Clear the DTC after completion of repair.
1. Connect the TOYOTA hand-held tester to the DLC3.
Before clearing, check that DTCs and freeze frame data of the HV ECU and the ECU related to the operation history data are recorded.

2. Operate the TOYOTA hand-held tester to erase the DTC (See the hand-held tester operator's manual.).