2026-06-26

Heater - PTC (RHD) (Dual Motor) (Remove and Replace)

Correction Code 18106402

  • 2026-06-26: Added ODIN routine to clear isolation alert counters.
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning
Only technicians who have been trained in High Voltage Awareness and have completed all required certification courses (if applicable) are permitted to perform this procedure. Proper personal protective equipment (PPE) and insulating HV gloves with a minimum rating of class 0 (1000V) must be worn any time a high voltage cable is handled. Refer to Tech Note TN-15-92-003, "High Voltage Awareness Care Points" for additional safety information.
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning
If the 12V power supply is disconnected, do not attempt to open any doors with door glass in closed position. Failure to follow this instruction could result in door glass shatter.
Informational PurposesAn informational icon, calling your attention
Note
Before disconnecting the 12V power supply, ensure that the driver’s door window is fully open. Failure to follow this instruction could result in vehicle lockout.

Removal

  1. Open the glove box.
  2. Perform the vehicle HV disablement procedure (refer to procedure).
  3. Remove the cowl screen panel (refer to procedure).
  4. Remove and discard the cable tie that secures the PTC heater harness to the bulkhead.
  5. Release the PTC heater harness (#4 in the below image) from the top of the forward junction box (FJB).
    1 HV Battery heater harness
    2 DC-DC converter harness
    3 Compressor harness
    4 PTC heater harness
  6. Push the connector, harness, and grommet through the bulkhead.
  7. Remove the glove box Glove Box (Remove and Replace).
  8. Remove the LH footwell cover.
  9. If equipped, remove the passenger knee airbag Knee Air Bag - Front Passenger's (Remove and Replace).
  10. If equipped, remove the bolts (x2) and screws (x3) that secure the passenger knee airbag bracket. Remove the airbag mounting bracket.
  11. Remove the screws (x2) that secure the RH HVAC duct.
  12. Remove the screws (x3) that secure the PTC heater to the HVAC casing (torque 1 Nm).
  13. Release the PTC heater harness from the HVAC retaining clip.
  14. Disconnect the connector from the PTC heater.
  15. Carefully pull the PTC harness through the bulkhead.
  16. Carefully remove the PTC heater module from the HVAC casing.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Take care not to damage component(s).

Installation

Installation procedure is the reverse of removal, except for the following:
Informational PurposesAn informational icon, calling your attention
Note
Later revisions of the PTC heater come with a white KET connector. This connector is fully backwards compatible and does not need to be replaced by the brown KET connector.
  • Clean the interior of the HVAC casing prior to assembly.
  • Replace the cable tie that secures the PTC heater harness to the bulkhead.
  • Reinstall the latest vehicle firmware, or update the firmware if not the latest. See Firmware Reinstall - Touchscreen or Firmware Update.
  • Perform the following routine using Service Mode or Toolbox (see 0005 - Service Modes): PROC_BMS_X_CLEAR-ISOLATION-ALERT-COUNTERSvia Service Mode Plus:High Voltage ➜ HV Battery ➜ Clear Isolation Countervia Toolbox:(link)