STEP 1. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
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 exists (2 Ω or less)
Is the check result normal?
Go to Step 3. Repair the connector(s) or wiring harness.
STEP 3. Check of open circuit, short to ground or short to power supply in CNBL, CNBH line between main drive lithium-ion battery connector and BMU connector.
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 7. Replace the battery management unit (BMU) (Refer to ).
STEP 5. Using scan tool (M.U.T.-IIISE), check whether the other system DTC is set.
STEP 6. Measure the voltage 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) Turn on the power supply mode of the electric motor switch.
(3) Check the voltage between the D-33 main drive lithium-ion battery connector (terminal No.2) and body ground.OK: Battery voltage
Is the check result normal?
Go to Step 8. Check the fuse or repair the fuse, connector(s) or wiring harness. If fuse is blown, refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - Inspection Service Points for a Blown Fuse .
STEP 7. Check whether the DTC is set again.
Recheck the DTC.(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 the DTC.
Is the DTC set?
Unload main drive lithium-ion battery from the vehicle and repair or replace defective parts (the circuit and the terminal resistance can have an abnormality inside the main drive lithium-ion battery). Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
STEP 8. Check of open circuit and damage circuit in line between main drive lithium-ion battery current sensor connector and joint connector.