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DTC P1E06: PTC Heater Stuck OFF
cautionBefore replacing the ECU, ensure that the communication circuit is normal.
 
 
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • Battery management unit (BMU) power supply voltage is 8 volts to 16 volts.
  • Time after above conditions satisfy is more than 1 seconds.
  • PTC heater contactor (P) drive relay ON.
  • PTC heater contactor (N) drive relay ON.
  • Main drive lithium-ion battery PTC heater main relay ON continues 0.2 second.
  • PTC heater drive request ON.
Judgment Criterion
  • The state of the PTC heater output current is less than 0.3 A continues for 12.1 second.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Not available
 
 
PROBABLE CAUSES
  • The PTC heater is failed.
 
 
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), check whether the DTC is set.
Check whether the DTC P1EF0 or P1EF3 is set.
Is the DTC set?
Perform the troubleshooting for DTC (Refer to ).
Go to Step 2.
 
STEP 2. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck if the DTC is set.
(1) Erase the DTC.
(2) Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)*.
note*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
(3) Wait for 15 seconds or more.
(4) Check if the DTC is set.
Is the DTC set?
Remove the battery tray cover (Refer to ). Replace the main drive lithium-ion battery PTC heater (Refer to ). Then, assemble the main drive lithium-ion battery assembly (Refer to ).
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-III), check data list <BMU>
Check the BMU's data list (Refer to ).
  • Item No.438: BAT. heat initial judge. end flag
Is the value of data list "ON"?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 4.
 
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
(1) Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)*.
note*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
(2) Select "BMU" from System select Screen of the scan tool (M.U.T.-IIISE).
(3) Select the "Special Function" from the BMU screen.
(4) Select the "Test" from the Special Function screen
(5) Select the "Battery heating system drive" from the Test screen.
note"Battery heating system drive" can be performed only once after the power supply mode of the electric motor switch is turned ON.
(6) Turn off the power supply mode of the electric motor switch.
(7) Check the DTC.
Is the DTC set?
Remove the battery tray cover (Refer to ). Replace the PTC heater. Then, assemble the main drive lithium-ion battery assembly (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).