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DTC P0C11: Motor coil U-phase temperature too high
DTC P0C13: Motor coil W-phase temperature too 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)
  • Drive motor coil temperature sensor
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • Power drive unit (FEMCU) power supply voltage is 8 volts to 16 volts.
Judgment Criterion
  • Change of the coil temperature is more than 175°C (347°F) (4.84 volts) for 1 second.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
 
 
PROBABLE CAUSES
  • The EV cooling system fails (radiator fan, EV oil cooler, electric oil pump, oil)
  • Oil filter clogging
  • Pipe clogging
  • Electric oil pump relay abnormality
  • Electric oil pump related harness abnormality
  • The temperature sensor circuit fails
  • Malfunction of the front motor assembly
  • Malfunction of the power drive unit (FEMCU)

 
 
DIAGNOSIS
Required Special Tools
  • MB991223: Wiring harness set
  • MB992006: Extra fine probe
STEP 1. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
Check whether the power drive unit [generator control unit (GCU)] set a DTC P105C, P105B or P10AE which is related to the electric oil pump.
Is the DTC set?
Carry out troubleshooting for the DTC P105C, P105B or P10AE (Refer to <DTC P105C>, <DTC P105B>, <DTC P10AE>). Then go to Step 10.
Go to Step 2.
 
STEP 2. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
Check whether the PHEV-ECU set a DTC P0691, P0692, P0693, P0694, P10DE or P10DF which is related to the fan, fan motor and fan shroud assembly.
Is the DTC set?
Carry out troubleshooting for the DTC P0691, P0692, P0693, P0694, P10DE or P10DF (Refer to GROUP 54Da - PHEV-ECU - Troubleshooting <DTC P0691, P0692, P0693, P0694>, <DTC P10DE, P10DF>). Then go to Step 10.
Go to Step 3.
 
STEP 3. Check the resistance in the coil temperature sensor.
(1) Disconnect the power drive unit connector.
(2) Check the conduction of the harness between the power drive unit and the front motor and measure the resistance value of the coil temperature sensor (U-phase and W-phase) in the power drive unit connector terminals.
 
Terminal codeNormal value
TH1 to TH1G (U-phase)
  • Approx. 400kΩ to 600kΩ at -20°C (-4°F)
  • Approx. 140kΩ to 200kΩ at 0°C (32°F)
  • Approx. 55kΩ to 70kΩ at 20°C (68°F)
  • Approx. 23kΩ to 30kΩ at 40°C (104°F)
TH2 to TH2G (W-phase)
Is the check result normal?
Go to Step 4.
Replace the wiring harness (TH1 line, TH1G line, TH2 line, TH2G line) and the front motor assembly (Refer to ). Then go to Step 10.
 
STEP 4. Using scan tool (M.U.T.-IIISE), check the actuator test.
Check the following actuator test (Refer to GROUP 54Da - PHEV-ECU - Actuator Test Reference Table ).
  • Item No.3: Radiator fan relay 1 actuate
  • Item No.4: Radiator fan relay 2 actuate
Is the check result normal?
Go to Step 5.
Replace the fan, fan motor and fan shroud assembly (Refer to GROUP 14A - Radiator ). Then go to Step 10.
 
STEP 5. Check the EV oil cooler.
Visually check that there is no abnormality such as a dent or deformation in the fin of the EV oil cooler.
Is the check result normal?
Go to Step 6.
Replace the EV oil cooler (Refer to GROUP 14B - EV oil cooler ). Then go to Step 10.
 
STEP 6. Check the oil level.
Check that the oil level is at the lower edge of the oil level plug hole.
Is the check result normal?
Go to Step 7.
Go to Step 8.
 
STEP 7. Oil filter check
Remove the generator drain plug, check that the oil filter behind it is not clogged or damaged.
Is the check result normal?
Replace the Oil filter and Oil (Refer to GROUP 14B - On-Vehicle Service <Oil Cooling System> - Oil Change ). Then go to Step 10 .
Replace the EV oil cooler hose and EV oil cooler pipe (Refer to GROUP 14B - Oil Hose and Pipe ), the EV oil cooler bypass valve and electric oil pump (Refer to GROUP 14B - Electric Oil Pump/EV Oil Cooler Bypass Valve ), the Oil filter and Oil (Refer to GROUP 14B - On-Vehicle Service <Oil Cooling System> - Oil Change ). Then go to Step 10 .
 
STEP 8. Check the oil level.
Check the abnormal state of the oil level.
What is the abnormal state of the oil level?
: Replace the EV oil cooler hose and EV oil cooler pipe (Refer to GROUP 14B - Oil Hose and Pipe ), the EV oil cooler bypass valve and electric oil pump (Refer to GROUP 14B - Electric Oil Pump/EV Oil Cooler Bypass Valve ). Then go to Step 9.
: Remove the oil and replace all oil-cooled parts. (the front motor (Refer to ), the generator (Refer to ), the EV oil cooler (Refer to GROUP 14B - EV Oil Cooler ), EV oil cooler hose and EV oil cooler pipe (Refer to GROUP 14B - Oil Hose and Pipe ) and the EV oil cooler bypass valve and electric oil pump (Refer to GROUP 14B - Electric Oil Pump/EV Oil Cooler Bypass Valve )). Then, inject new oil. (Refer to GROUP 14B - On-Vehicle Service <Oil Cooling System> - Oil Change ). Then go to Step 10.
 
STEP 9. Using scan tool (M.U.T.-IIISE), check the actuator test.
cautionWhen ambient temperature is -15°C (5°F) or less, the oil pump may not operate stably. Execute the actuator test only when the temperature is above -15°C (5°F).
(1) Execute the actuator test below: (Refer to .)
Item 1. Oil pump
(2) Check for the existence of oil leakage.
Is the oil level appropriate?
Go to Step 10.
Go to Step 8.
 
STEP 10. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(2) Check the DTC.
Is the DTC set?
Replace the power drive unit (Refer to ). Then go to Step 11.
The procedure is complete.
 
STEP 11. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(2) Check the DTC.
Is the DTC set?
Retry the troubleshooting.
The inspection is complete.