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DTC No. P304A-98 VCU Phase IGBT1 temperature-high
DTC No. P304B-98 VCU Phase IGBT2 temperature-high
DTC No. P304C-98VCU Phase IGBT3 temperature-high
DTC No. P304D-98 VCU Phase IGBT4 temperature-high
DTC No. P304E-98 VCU Phase IGBT5 temperature-high
DTC No. P304F-98 VCU Phase IGBT6 temperature-high
DTC No. P3050-98 VCU Phase IGBT7 temperature-high
DTC No. P3051-98 VCU Phase IGBT8 temperature-high
 
 
 
 
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)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Power drive unit IGBT temperature sensor
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Condition
  • Power drive unit (VCU) power supply voltage is 8.0 volts or more.
Judgment Criterion <DTC No.P304A-98>
  • The VCU IGBT temperature (S1-1 phase) is more than 155°C (311°F) for 0.12 second or more.
Judgment Criterion <DTC No.P304B-98>
  • The VCU IGBT temperature (S2-1 phase) is more than 155°C (311°F) for 0.12 second or more.
Judgment Criterion <DTC No.P304C-98>
  • The VCU IGBT temperature (S3-1 phase) is more than 155°C (311°F) for 0.12 second or more.
Judgment Criterion <DTC No.P304D-98>
  • The VCU IGBT temperature (S4-1 phase) is more than 155°C (311°F) for 0.12 second or more.
Judgment Criterion <DTC No.P304E-98>
  • The VCU IGBT temperature (S1-2 phase) is more than 155°C (311°F) for 0.12 second or more.
Judgment Criterion <DTC No.P304F-98>
  • The VCU IGBT temperature (S2-2 phase) is more than 155°C (311°F) for 0.12 second or more.
Judgment Criterion <DTC No.P3050-98>
  • The VCU IGBT temperature (S3-2 phase) is more than 155°C (311°F) for 0.12 second or more.
Judgment Criterion <DTC No.P3051-98>
  • The VCU IGBT temperature (S4-2 phase) is more than 155°C (311°F) for 0.12 second or more.
 
 
OBD-II DRIVE CYCLE PATTERN
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the power drive unit
  • Malfunction of the EV water cooling system
  • Malfunction of the radiator fan system
 
 
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.M.U.T.-IIISE other DTC check
Check whether the DTC, which has the higher priority than this DTC, is set. (Refer to DTC Inspection Priority Chart).
Is the DTC set?
Troubleshoot the set DTC (Refer to DIAGNOSTIC TROUBLE CODE CHART).
 
2.M.U.T.-IIISE other DTC check
Check whether the PHEV-ECU sets the following DTCs.
  • DTC No. P3123-15 Water Pump monitor circuit-High
  • DTC No. P3124-11 Water Pump monitor circuit-Low
  • DTC No. P3125-01 Water Pump Function Monitor A
  • DTC No. P3126-01 Water Pump Function Monitor B
  • DTC No. P3127-9F Water Pump Function Monitor C
  • DTC No. P3128-9E Water Pump Function Monitor D
Is the DTC set?
Troubleshoot the set DTCs (Refer to DIAGNOSTIC TROUBLE CODE CHART). Then,
 
3.M.U.T.-IIISE other system DTC
Check whether the PHEV-ECU sets the DTC related to the radiator fan.
Is the DTC set?
Troubleshoot the set DTC (Refer to PHEV-ECU – DIAGNOSTIC TROUBLE CODE CHART DIAGNOSTIC TROUBLE CODE CHART). Then,
 
4.Check of the EV water cooling system
Check the EV water cooling system (Refer to EV COOLANT LEAK CHECK).
Is the check result normal?
Replace the power drive unit (Refer to POWER DRIVE UNIT REMOVAL AND INSTALLATION). Then,
Repair or replace the faulty part. Then, replace the power drive unit (Refer to POWER DRIVE UNIT REMOVAL AND INSTALLATION).
 
5.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.