08/08/2024 04:29:04

Vehicle Sanitation - Evaporator - Tunap 994 (EMEA)

Correction code 18106728

  • 2024-08-08: Removed sub-procedures for sanitation using Tunap 589 and Tunap I880.
  • 1769621-00-A FOAMING CLEANER, TUNAP 994, AC EVEAPORATOR
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Warning
When not in use, store the cleaning products in a cabinet designed for flammable materials.
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CAUTION
Take care to protect all electrical components (connectors, harnesses, body controllers, etc.) from overspray.
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Note
Dispose of spent cleaners and containers in accordance with all local, regional, national and international regulations.

Procedure

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Warning
Read the safety information provided with the evaporator cleaning product before beginning this procedure.
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Warning
Wear safety glasses and nitrile chemical resistant gloves and work in a well-ventilated area when using the evaporator cleaning product.
  1. Place a coolant drain container or absorbent material under the front of the vehicle.
  2. Turn off A/C, set the cabin air to HI temperature, maximum blower speed and outside air intake, and then let the blower run for 8 minutes.
  3. Remove the glove box. See Glove Box (Remove and Replace).
  4. Remove the passenger side floor air duct.
  5. Set the HVAC temperature to LO and wait 10 seconds, until the flaps between the evaporator and PTC heater are closed.
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    Note
    This step is required to make sure that the evaporator flush fluid will not enter the PTC compartment.
  6. Remove the front HVAC blower motor. See Blower Motor - Front HVAC (Remove and Replace).
  7. Remove the cabin air filter. See Filter - Cabin (Remove and Replace).
  8. Disconnect the FET connector.
  9. Remove the screws (x2) that attach the FET to the HVAC assembly (torque 1 Nm), and then remove the FET from the HVAC assembly.
  10. Pour 1 liter of Tunap 994 hygienic cleaner into the tank of the pressure cup spray gun, and then connect shop air to the spray gun.
  11. Slightly bend the probe of the pressure cup spray gun:
    1. Measure 20 cm from the beginning of the probe.
    2. Bend the probe approximately 15 degrees towards the spray holes.
  12. Insert the probe into the HVAC filter housing, and then spray all of the cleaning solution onto the evaporator.
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    Note
    The spray holes in the probe should face to the rear of the vehicle, towards the evaporator.
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    Note
    Be sure to coat the entire evaporator with the cleaning solution.
  13. Let the cleaning solution sit on the evaporator for 30 minutes.
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    Note
    Check under the vehicle and adjust the coolant drain container/absorbent material as necessary.
  14. Install a new cabin air filter. See Filter - Cabin (Remove and Replace).
  15. Install other parts that were removed in the reverse order of removal.
  16. Once the evaporator cleaning fluid has sat long enough (30 minutes), turn on A/C, set the cabin air to LO temperature, maximum blower speed and outside air intake.
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    Note
    The cleaning foam will exit through the HVAC drain. Continue to the next step once clean water is observed exiting the HVAC drain.
  17. Remove the coolant drain container/absorbent material from under the vehicle.