Displaying & Reading Trouble Codes
NOTE: This is the only information provided by the manufacturer for reading Diagnostic Trouble Codes for this system.1. PRECAUTION
a. When distinguishing trouble and replace the defective part, take necessary preventive measures against an electric shock.
b. Some portions of the wiring harness in the THS vehicle have circuits to which a high voltage is applied. To prevent an electrical shock, be sure to observe the following:
1. Wear insulated gloves during inspection.
2. Remove a service plug and do not start any repair operation before 5 minutes have passed. Then, confirm that the voltage at the output terminals has dropped down to 12 V or less.
3. Use insulated tools during inspection.
4. When disengaging the wiring connectors, hold the connector bodies to avoid pulling the wires. When engaging the wiring connectors, be sure to engage them securely.
c. Do not leave the tools or parts (bolts, nuts, etc.) inside the cabin.
d. Do not carry metallic objects such as mechanical pencils or scales.
2. DIAGNOSIS SYSTEM
a. Description
- The HV control ECU has a self-diagnosis system by which malfunction in the computer itself or in THS components is detected and the Hybrid vehicle warning light in the multi-information display are lighted up.
- To check the Diagnostic Trouble Codes (DTC), connect the 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:
As the freeze frame data records the driving condition when a malfunction is detected, when troubleshooting, it is useful for determining whether the vehicle was running, braked, stopped or reversed.
b. Check the DLC3.
The HV control ECU conforms to ISO 14230 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 14230 format.
HINT: If your display shows UNABLE TO CONNECT TO VEHICLE when you have connected the cable of the TOYOTA hand-held tester to the DLC3, turned the motor switch ON and operated the tester, there is a problem in the vehicle or tool.
- If communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.
- If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tool itself, so consult the Service Department.
3. INSPECT DIAGNOSIS
a. Check the auxiliary battery.
1. Measure the voltage of the auxiliary battery.
Voltage: 10 - 15 V
2. Inspect the auxiliary battery, fuses, fusible links, wiring harness, connectors and ground.
b. Check the master warning light.
1. Turn the ignition switch ON and confirm that the master warning light comes on.
HINT: If the master warning light does not come on, suspect a burnt fuse, burnt bulb, or open in wiring harness.
2. When the "READY" light is ON, the master warning light should go off.
If the lamp remains on, the diagnosis system has detected a malfunction in the system or the message such as "When you park your care, make sure you shift to Park "R" and "The batteries will not charge if the shifter is �N" appears on the multi-information display.
Since DTC may be stored even though the lamp is OFF, be sure to check DTC.
c. 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.
HV ECU - DTC & Information #:
HV ECU - Information & Freezed Frame Data:
HV ECU - Operation History Data Part 1:
HV ECU - Operation History Data Part 2:
HV ECU - Operation History Data Part 3:
HV ECU - Operation History Data Part 4:
Battery ECU:
Engine ECU:
EMPS ECU:
5. See details of the DTC.
d. 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.).
4. FAIL-SAFE CHART
B2799 - P3004:
P3100:
P3100 - P3108:
P3109 - P3120:
P3125:
P3125 - P3145:
If any the following codes is recorded, the HV ECU enters the fail safe mode.
5. CHECK FOR INTERMITTENT PROBLEMS
a. Perform a simulation test.
In the simulation test, reproduce the driving condition at the trouble occurrence according to the customer's comments and freeze frame data recorded with DTC, such as an opening angle of the accelerator pedal, SOC, engine coolant temperature, engine rpm, and MG/1MG2 rpm and torque.
b. Check the connector and terminal.
c. Handle the connector.
Part 1:
Part 2:
Part 3:
Part 4:
6. TOYOTA HAND-HELD TESTER DISPLAY ITEMS