No Warm Air Comes Out [11/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Toyota Corolla Cross, 2024 Toyota Corolla Cross, and 2023 Toyota Corolla Cross. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING GTS (COOLANT TEMPERATURE)
- Read the Data List according to the display on the GTS.
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
The value of the display does not change frequently.
Result
Proceed to OK NG
Result:
NG
GO TO COOLING SYSTEM. Refer to ON-VEHICLE INSPECTION [09/2021 - ]
Result:
OK
See step 2
- Read the Data List according to the display on the GTS.
- PERFORM ACTIVE TEST USING GTS
- Perform the Active Test according to the display on the GTS.
Body Electrical > Air Conditioner > Active Test
Tester Display Measurement Item Control Range Diagnostic Note Front Left Air Mix Damper Control Servo Motor No. 1 air conditioning radiator damper servo sub-assembly pulse 128: Min
384: MaxOperates between 165 to 257 pulses Front Right Air Mix Damper Control Servo Motor No. 1 air conditioning radiator damper servo sub-assembly pulse 128: Min
384: MaxOperates between 255 to 347 pulses Body Electrical > Air Conditioner > Active Test
Active Test Display Front Left Air Mix Damper Control Servo Motor Data List Display Front Left Air Mix Damper Control Servo Motor Actual Pulse Body Electrical > Air Conditioner > Active Test
Active Test Display Front Right Air Mix Damper Control Servo Motor Data List Display Front Right Air Mix Damper Control Servo Motor Actual Pulse OK
Damper servo motor is operated.
Result
Proceed to OK NG
Result:
OK
REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY. Refer to DISASSEMBLY [09/2021 - ]
Result:
NG
GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR. Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2022 - ]
- Perform the Active Test according to the display on the GTS.