DTC No. U1D72-81 Driving mode CAN 298 DLC diagnosis

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)

BMU monitor
EV CAN monitor

Sensor (The sensor below is determined to be normal)

Not applicable

DTC SET CONDITIONS

Logic Flow Chart

Check Condition

BMU power supply voltage is more than 8.988 volts

Judgment Criterion

The communication data rationality between the BMU and power drive unit is in fail condition for 2 seconds or more.

OBD-II DRIVE CYCLE PATTERN

Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE.

TROUBLESHOOTING HINTS

Malfunction of the power drive unit
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.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?

Replace the power drive unit (Refer to POWER DRIVE UNIT REMOVAL AND INSTALLATION

). Then,

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?

Disassemble the drive battery (Refer to SERVICE PROCEDURE

). After the disassembly, replace the BMU (Refer to BATTERY MANAGEMENT UNIT (BMU) REMOVAL AND INSTALLATION

). Then,

The procedure is complete.

3.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.