Toyota Camry (XV70): No Warm Air Comes Out

Toyota Camry Repair Manual XV70 (2018-2024) / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System (for Manual Air Conditioning System) / No Warm Air Comes Out

DESCRIPTION

If cool air blows from the registers regardless of the temperature setting of the air conditioning system, the following suspected areas may be the cause.

Symptom	Factor
No warm air comes out (Blower control is normal) Outlet air temperature does not increase (Blower control is normal)	Engine coolant temperature (low) Refrigerant volume (low) No. 1 air conditioning radiator damper servo sub-assembly malfunction Warm-up control Blockage in heater radiator unit sub-assembly Flow shutting valve (water by-pass hose assembly)

PROCEDURE

1.	CHECK FOR DTC

(a) Check for DTCs.

Powertrain > Engine > Trouble Codes

OK:

SFI system DTCs are not output.

GO TO DTC CHART FOR A25A-FKS, SFI SYSTEM

2.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Engine / Data List.

(e) 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).

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.

GO TO COOLING SYSTEM

3.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(e) 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 (air mix) pulse	Min.: 128 Max.: 383	Operates between 165 to 257 pulses
Air Outlet Servo Pulse (D)	No. 1 air conditioning radiator damper servo sub-assembly (mode) pulse	Min.: 128 Max.: 383	Operates between 241 to 348 pulses
Air Inlet Damper Targ Pulse	No. 1 blower damper servo sub-assembly pulse	Min.: 128 Max.: 383	Operates between 220 to 256 pulses

Tester Display

Measurement Item

Control Range

Diagnostic Note

Air Mix Servo Targ Pulse(D)

No. 1 air conditioning radiator damper servo sub-assembly (air mix) pulse

Min.: 128

Max.: 383

Operates between 165 to 257 pulses

Air Outlet Servo Pulse (D)

No. 1 air conditioning radiator damper servo sub-assembly (mode) pulse

Min.: 128

Max.: 383

Operates between 241 to 348 pulses

Air Inlet Damper Targ Pulse

No. 1 blower damper servo sub-assembly pulse

Min.: 128

Max.: 383

Operates between 220 to 256 pulses

Body Electrical > Air Conditioner > Active Test

Tester Display
Air Mix Servo Targ Pulse(D)

Body Electrical > Air Conditioner > Active Test

Tester Display
Air Outlet Servo Pulse (D)

Body Electrical > Air Conditioner > Active Test

Tester Display
Air Inlet Damper Targ Pulse

OK:

Each damper servo motor operates.

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR

SEE MORE:

Ultrasonic Sensor (Front Left Corner) Missing Message (C1AE187)

DESCRIPTION This DTC is stored when an open circuit or short occurs in the communication line between the front corner ultrasonic sensor LH and the front center ultrasonic sensor LH, or when a malfunction occurs in the front corner ultrasonic sensor LH. DTC No. Detection Item DTC Detect

Parts Location

PARTS LOCATION ILLUSTRATION *1 FUEL LID LOCK WITH MOTOR ASSEMBLY *2 FUEL LID OPENER SWITCH *3 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - FUEL OPN RELAY *4 NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - FUEL OPN FUSE *5

Toyota Camry (XV70): No Warm Air Comes Out

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Ultrasonic Sensor (Front Left Corner) Missing Message (C1AE187)

Parts Location