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LAN-198 < DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)] HV BAT BRANCH LINE CIRCUIT HV BAT BRANCH LINE CIRCUIT Diagnosis Procedure INFOID:0000000010415452 DANGER: Since 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. WARNING: • Be sure to remove the service plug in order to disconnect the high voltage circuits before perform- ing inspection or maintenance of high voltage system harnesses and parts. • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake. • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system. • Never allow workers other than the responsible person to touch the vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insu- lating sheet except when using them. CAUTION: Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed. 1. CHECK CONNECTOR 1. Turn the power switch OFF. 2. Disconnect the 12V battery cable from the negative terminal. Refer to LAN-26, "Precautions for Removing 3. Check the terminals and connectors of the Li-ion battery for damage, bend and loose connection (unit side and connector side). Is the inspection result normal? YES >> GO TO 2. NO >> Repair the terminal and connector. 2. CHECK HARNESS FOR OPEN CIRCUIT 1. Disconnect the connector of Li-ion battery. 2. Check the resistance between the Li-ion battery harness connector terminals. Is the measurement value within the specification? YES >> GO TO 3. NO >> Repair the Li-ion battery branch line. 3. PRECONDITIONING WARNING: Disconnect the high voltage. Refer to GI-33, "How to Disconnect High Voltage" Check voltage in high voltage circuit. (Check that condenser are discharged.) 1. Lift up the vehicle and remove the Li-ion battery under covers. Refer to 2. Disconnect high voltage harness connector and PTC heater harness connector from front side of Li-ion battery. Refer to EVB-181, "Removal and Installation" . Li-ion battery harness connector Resistance ( Ω) Connector No. Terminal No. B24 1 2 Approx. 108 – 132 |