No Warm Air Comes Out [01/2019 - 09/2022]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List.
5. Read the Data List according to the display on the Techstream.

   Powertrain > Engine > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature	Min.: -40°C (-40°F), Max.: 140°C (284°F)	75 to 100°C (167 to 212°F): After warming up	This is the engine coolant temperature. HINT:  After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F). After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal. If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted. Check if the engine overheats if the value indicated is higher than 135°C (275°F).

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

   OK

   After warming up the engine, the temperature value displayed is within the range specified in the normal condition column.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO COOLING SYSTEM. Refer to  ON-VEHICLE INSPECTION [01/2019 - 04/2020]  , or refer to  ON-VEHICLE INSPECTION [04/2020 - ] 

Result: 

OK 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Air Conditioner > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Air Mix Servo Targ Pulse(D)	No. 1 air conditioning radiator damper servo sub-assembly pulse	Min.: 128 Max.: 383	Operates between 165 and 257 pulses

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   Air Mix Servo Targ Pulse(D)

   OK

   The No. 1 air conditioning radiator damper servo motor operates.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR. Refer to  DIAGNOSTIC TROUBLE CODE CHART [01/2019 - 04/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [04/2020 - 09/2022] 

Result: 

OK 

See step  3

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ PTC Heater	A
   w/o PTC Heater	B

Result: 

B 

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY. Refer to  DISASSEMBLY [01/2019 - 06/2020]  , or refer to  DISASSEMBLY [06/2020 - 09/2022] 

Result: 

A 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Air Conditioner / Active Test / Heater Active Level / Data List / Electric Heater Active Level.

   Body Electrical > Air Conditioner > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Heater Active Level	Quick heater assembly	Min.: 0 Max.: 3	-

   Body Electrical > Air Conditioner > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Electric Heater Active Level	Actual electric heater operation level	Min.: 0 Max.: 3	Actual operation level of electric heater displayed	PTC heater circuit malfunction

   Body Electrical > Air Conditioner > Active Test 

   Active Test Display
   Heater Active Level

   Data List Display
   Electric Heater Active Level

5. Check that the value of the Data List item Electric Heater Active Level changes in accordance with the set value of the Active Test item Heater Active Level.

   OK

   Techstream Operation	Data List (Electric Heater Active Level)
   0 to 3	0 to 3

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY. Refer to  DISASSEMBLY [01/2019 - 06/2020]  , or refer to  DISASSEMBLY [06/2020 - 09/2022] 

Result: 

NG 

GO TO PTC HEATER CIRCUIT. Refer to  PTC Heater Circuit [01/2019 - 09/2022]