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DTC P0B3C, P0B41, P0B46, P0B4B, P0B50, P0B5A, P0B5F, P0B64, P0B69, P0B6E: Cell Voltage Sensor Rationality
cautionWhenever ECU is replaced, ensure that the CAN bus lines are normal.
 
 
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Main drive lithium-ion battery cell voltage monitor
  • Battery CAN monitor
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • battery management unit (BMU) power supply voltage is 8 volts to 16 volts.
  • Time after above conditions satisfy is more than 2 seconds.
Judgment Criterion
  • The absolute value of the difference between the value of the voltage between the terminal for the end of a module and the sum total of cell voltages in the module changes to 0.375 volts or more and the state continues for 3 seconds.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to OBD-II Drive Cycle - Pattern 1 .
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Not available
 
 
PROBABLE CAUSE
  • The cell monitoring unit (CMU) in the main drive lithium-ion battery is failed.
 
 
 
 
DIAGNOSIS
STEP 1. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle - Pattern 1 .
(2) Check if the DTC is set.
Is the DTC set?
Remove the battery tray cover (Refer to ). Replace the cell monitoring unit (CMU) corresponding to the diagnostic trouble code being set (Refer to ). Then, assemble the main drive lithium-ion battery assembly (Refer to ). Then go to Step 2.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
 
STEP 2. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle - Pattern 1 .
(2) Check if the DTC is set.
Is the DTC set?
Retry the troubleshooting.
The procedure is complete.