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DTC P0AF3: IGBT temperature sensor fails (range)
 
 
danger
  • When servicing the high voltage system parts, always shut off the high voltage by removing the service plug (Refer to ).
  • When servicing the high voltage system parts, always wear the protective equipment or armor to measure the high voltage (Refer to ).
 
 
DESCRIPTIONS OF MONITOR METHODS
  • A rationality monitor will be used to compare the temperature of each phase within one IGBT.
  • The difference between minimum and maximum phase temperature within an IGBT is calculated.
 
 
MONITOR EXECUTION
  • Once per driving cycle
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
  • Non-volatile random access memory monitor
  • EV-CAN monitor
  • Battery energy control module (sub BMU) monitor
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • Power REMCU power supply voltage is 8 volts to 16 volts.
  • Time after above conditions satisfy is less than 1.5 seconds.
  • The soaking time is more than 300 seconds.
  • The IGBT status of GCU is off (Shutdown).
Judgment Criterion
  • The absolute value of the difference between the maximum IGBT temperature and minimum IGBT temperature remains 16°C (61°F) or more in 0.8 seconds.
    note
    • Maximum IGBT temperature is the temperature of hottest phase between U-phase, V-phase and W-phase.
    • Minimum IGBT temperature is the temperature of coldest phase between U-phase, V-phase and W-phase.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 5 .
 
 
PROBABLE CAUSES
  • Malfunction of the REMCU
  • Malfunction of the rear motor high voltage circuit system
 
 
DIAGNOSIS
STEP 1. Check the high-voltage terminal.
dangerCarry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle (Refer to ).
dangerWear the specified protection equipment during the check.
(1) Shut down the high voltage (Refer to ).
(2) Check that the following cable is tightened to the specified torque.
  • Rear motor cable connection (Refer to ).
Is the check result normal?
Replace the REMCU (Refer to ). Then go to Step 2.
Tighten the rear motor cable to the specified torque (Refer to ). Then go to Step 2.
 
STEP 2. 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 5 .
(2) Check the DTC.
Is the DTC set?
Retry the troubleshooting.
The inspection is complete.