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DTC No. P1B11-49 ALU diagnosis part
 
 
 
 
DTC SET CONDITION
Check Condition
  • During the BMU operation
Judgment Criterion
  • The difference in the ALU diagnosis results between the BMU (main CPU) and BMU2 (sub CPU) is detected.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the BMU
 
 
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 whether the DTC is set again.
(1) Erase the DTC set in the BMU2.
(2) Erase the DTC set in the BMU.
(3) Change the power supply mode of the electric motor switch to ON (READY indicator: ON).
(4) Wait for 1 minute or more.
(5) Check whether the DTC is set again.
Is the DTC set?
Replace the drive battery (Refer to DRIVE BATTERY REMOVAL AND INSTALLATION).
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).