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DTC No. P0B40-00 CC diagnosis - Common Register diagnosis (ASIC2)
 
 
 
 
MONITOR EXECUTION
  • Continuous <Condition A and B>
  • Once per driving cycle (During the BMU terminaition) <Condition C>
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • BMU monitor
  • Drive battery voltage sensor circuit monitor
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart <Condition A>
Logic Flow Chart <Condition B>
Logic Flow Chart <Condition C>
Check Condition A and B
  • Battery Management Unit (BMU) power supply voltage is more than 7.578 volts.
Check Condition C
  • Battery Management Unit (BMU) power supply voltage is more than 7.578 volts.
  • Shutdown sequense: ON
Judgment Criterion <Condition A (1)>
  • When the transistor switch of the failed battery cell number is on, the voltage of the failed battery cell number changes to 2.09 volts or less.
  • When the transistor switch of the failed battery cell number is off, the voltage of the failed battery cell number changes to 4.26 volts or more.
  • When the transistor switch before the failed battery cell number is on, the voltage before the failed battery cell number changes to 4.26 volts or more.
  • When the transistor switch before the failed battery cell number is off, the voltage before the failed battery cell number changes to 2.09 volts or less.
Judgment Criterion <Condition A (2)>
  • When the transistor switch of the failed battery cell number is on, the voltage of the failed battery cell number changes to 4.26 volts or more.
  • When the transistor switch of the failed battery cell number is off, the voltage of the failed battery cell number changes to 2.09 volts or less.
  • When the transistor switch before the failed battery cell number is on, the voltage before the failed battery cell number changes to 2.09 volts or less.
  • When the transistor switch before the failed battery cell number is off, the voltage before the failed battery cell number changes to 4.26 volts or more.
Judgment Criterion <Condition B>
  • The cell voltage is between 2.09 volts and 4.26 volts for 1.14 seconds or more.
Judgment Criterion <Condition C>
  • The internal fail status is in Fail condition.
 
 
OBD-II DRIVE CYCLE PATTERN
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the cell voltage wiring harness
  • Malfunction of the drive battery (battery module Nos. 1 and 2)
  • Malfunction of the BMU
  • Looseness or foreign material attached on the bus bar
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
1.Check of other DTC
Check whether the BMU and BMU2 set the following DTC.
  • DTC No. P0A1F-00 ECU Internal Failure
  • DTC No. P0EEC-00 ECU Internal Failure
Is the DTC set?
The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).
 
2.Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE.
(2) Check the DTC.
Is the DTC set?
The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).
 
3.Check the looseness or foreign material attached on the bus bar
(1) Disassemble the drive battery (Refer to SERVICE PROCEDURE).
(2) Check that there is no looseness or foreign material attached on the bus bar of the battery module No. 1 and No. 2.
Is the check result normal?
Repair or replace the faulty part. Then,
 
4.Cell voltage harness check
Check the cell voltage wiring harness of the battery module No. 1 and No. 2 (Refer to CELL VOLTAGE HARNESS CHECK).
Is the check result normal?
Replace the cell voltage harness (Refer to SERVICE PROCEDURE). Then,
 
5.Battery module No. 1 and No. 2 check
Check the battery module No. 1 and No. 2 (Refer to BATTERY MODULE CHECK).
Is the check result normal?
Replace the BMU (Refer to BATTERY MANAGEMENT UNIT (BMU) REMOVAL AND INSTALLATION). Then,
Replace the drive battery (Refer to DRIVE BATTERY REMOVAL AND INSTALLATION). Then,
 
6.Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE.
(2) Check the DTC.
Is the DTC set?
Retry the troubleshooting.
The procedure is complete.