STEP 1. Check the main drive lithium-ion battery PTC heater main relay.
STEP 2. Measure the power supply voltage at D-32 main drive lithium-ion battery connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn on the power supply mode of the electric motor switch without depressing the brake pedal.note | When depressing the brake pedal and turning on the power supply mode (Ready operation), the main drive lithium-ion battery PTC heater turns ON and it is impossible to measure normally. |
(3) Check the voltage between the D-32 main drive lithium-ion battery connector (terminal No.3) and body ground.OK: Approximately 0 volt
(4) Turn off the power supply mode of the electric motor switch.
Is the check result normal?
Go to Step 3. Repair the connector(s) or wiring harness.
STEP 3. Using scan tool (M.U.T.-IIISE), check the data list. <BMU (SUB)>
STEP 4. Resistance measurement at BMU connector.
(1) Remove the BMU, and measure at the equipment side.
(2) Resistance between D-203 BMU connector terminal No.37 and 38.OK: 120 ± 20 Ω
Is the check result normal?
Go to Step 5. Replace the battery management unit (BMU) (Refer to ).
STEP 5. Check of short to power supply circuit and damage in the main drive lithium-ion battery harness.
STEP 6. Resistance measurement at CMU7 connector.
STEP 7. Check whether the DTC is set again.
Recheck if the DTC is set.(1) Erase the DTC.
(2) Turn off the power supply mode of the electric motor switch.
(3) Turn on the power supply mode of the electric motor switch.
(4) Check if the DTC is set.
Is the DTC set?
Replace the battery management unit (BMU) (Refer to ). Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).