P33EE

P33EE BATTERY HEATER CONTROL SYSTEM

DTC Logic


DTC DETECTION LOGIC








Diagnosis Procedure


WARNING:
- Because hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.
- Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.
- To prevent the removed service plug from being connected by mistake during the procedure, always carry it in your pocket or put it in the tool box.
- Be sure to wear insulating protective equipment before beginning work on the high voltage system.
- Clearly identify the persons responsible for high voltage work and ensure that other persons do not touch the vehicle. When not working, cover high voltage parts with an insulating cover sheet or similar item to prevent other persons from contacting them.
- Refer to "High Voltage Precautions" Type 2.

CAUTION:
There is the possibility of a malfunction occurring if the vehicle is changed to READY status while the service plug is removed. Therefore do not change the vehicle to READY status unless instructed to do so in the Service Manual.

1. PRECONDITIONING


WARNING:
Disconnect the high voltage. Refer to "How to Disconnect High Voltage" Service and Repair.
1.Remove Li-ion battery. Refer to "Removal and Installation" Service and Repair.
2.Remove battery pack upper case. Refer to "BATTERY JUNCTION BOX : Disassembly and Assembly" Type 2, see Step-1 to Step-3.
- GO TO 2.

2. CHECK INSTALLATION CONDITION OF LI-ION BATTERY HEATER

Check the main body of Li-ion battery heater for installation condition.
Is the inspection result normal?
YES- GO TO 3.
NO- Tighten the mounting nut of the Li-ion battery heater to the specified torque. Refer to "Exploded view" Service and Repair.

3. CHECK CONNECTION STATUS OF LI-ION BATTERY HEATER CONNECTOR

Check the connection status of the Li-ion battery heater connector.
Is the inspection result normal?
YES- GO TO 4.
NO- Restore the connection status of the Li-ion battery heater connector.

4. CHECK RESISTANCE OF LI-ION BATTERY HEATER

Check resistance of Li-ion battery heater.





Is the inspection result normal?
YES- GO TO 5.
NO- Replace applicable Li-ion battery heater. Refer to "HEATER UNIT : Disassembly and Assembly" Disassembly And Assembly.

5. CHECK CONTINUITY OF LI-ION BATTERY HEATER AND HEATER RELAY UNIT

1.Disconnect Li-ion battery heater and heater relay unit harness connector harness connector.
2.Check continuity Li-ion battery heater and heater relay unit harness connector harness connector.





Is the inspection result normal?
YES- Replace heater relay unit. Refer to "HEATER UNIT : Disassembly and Assembly" Disassembly And Assembly.
NO- Repair harness or connector.