STEP 1. Check of the high voltage fuse No.7 inside the main drive lithium-ion battery.
STEP 2. Measure the resistance at main drive lithium-ion battery connector.
(1) Disconnect the D-33 main drive lithium-ion battery connector, and measure at the wiring harness side.
(2) Check the resistance between the D-33 main drive lithium-ion battery connector (terminal No.3) and body ground.OK: Continuity (2 Ω or less)
Is the check result normal?
Go to Step 3. Repair the connector(s) or wiring harness.
STEP 3. Check the resistance at the coil of the main drive lithium-ion battery PTC heater contactor. <On-vehicles>
STEP 4. Check the main drive lithium-ion battery PTC heater contactor (P) or (N)
STEP 5. Measure the resistance between the main drive lithium-ion battery PTC heater contactor (P) or (N) connector and the main drive lithium-ion battery connector.
(1) Disconnect the main drive lithium-ion battery PTC heater contactor (P) or (N) connector, and measure at the wiring harness side.
(2) Check the resistance between the main drive lithium-ion battery PTC heater contactor (P) connector (terminal No.1) and D-34 main drive lithium-ion battery connector (terminal No.2).OK: Continuity (2 Ω or less)
(3) Check the resistance between the main drive lithium-ion battery PTC heater contactor (P) connector (terminal No.3) and D-33 main drive lithium-ion battery connector (terminal No.3).OK: Continuity (2 Ω or less)
(4) Check the resistance between the main drive lithium-ion battery PTC heater contactor (N) connector (terminal No.4) and D-33 main drive lithium-ion battery connector (terminal No.3).OK: Continuity (2 Ω or less)
(5) Check the resistance between the main drive lithium-ion battery PTC heater contactor (N) connector (terminal No.2) and D-34 main drive lithium-ion battery connector (terminal No.1, No.7).OK: Continuity (2 Ω or less)
Is the check result normal?
Go to Step 6. Repair the connector(s) or wiring harness. Then, assemble the main drive lithium-ion battery PTC heater assembly (Refer to ).
STEP 6. Check the high-voltage cable.
STEP 7. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck if the DTC is set.(1) Erase the DTC.
(2) Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)*.note | *: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation. |
(3) Check if the DTC is set.
Is the DTC set?
Replace the battery management unit (BMU) (Refer to ). Go to Step 8.
STEP 8. Using scan tool (M.U.T.-IIISE), check the data list <BMU>
STEP 9. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
(1) Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)*.note | *: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation. |
(2) Select "BMU" from system select screen of the scan tool (M.U.T.-IIISE).
(3) Select the "Special Function" from the BMU screen.
(4) Select the "Test" from the Special Function screen
(5) Select the "Battery heating system drive" from the Test screen.note | "Battery heating system drive" can be performed only once after the power supply mode of the electric motor switch is turned ON. |
(6) Turn off the power supply mode of the electric motor switch.
(7) Check the DTC.
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 ).