Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001XL25
Model Year Start: 2022 Model: Camry Prod Date Range: [08/2021 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): No Warm Air Comes Out; 2022 - 2024 MY Camry [08/2021 -        ]

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)*
  • *: for A25A-FKS

PROCEDURE

1.

CONFIRM MODEL

Result

Proceed to

for 2GR-FKS

A

for A25A-FKS

B
A

GO TO STEP 3

B

2.

CHECK FOR DTC

(a) Check for DTCs.

Powertrain > Engine > Trouble Codes

OK:

SFI system DTCs are not output.

NG

GO TO SFI SYSTEM

OK

3.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream 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).

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.

NG

GO TO COOLING SYSTEM

for A25A-FKS: Click here 2019 - 2024 MY Camry [08/2018 -        ]; A25A-FKS (COOLING): COOLING SYSTEM: ON-VEHICLE INSPECTION

for 2GR-FKS: Click here 2018 - 2024 MY Camry [06/2017 -        ]; 2GR-FKS (COOLING): COOLING SYSTEM: ON-VEHICLE INSPECTION

OK

4.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream 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 (driver side air mix*1 or air mix*2) pulse

Min.: 128

Max.: 383

Operates between 165 to 257 pulses

Air Mix Servo Targ Pulse(P)

No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) pulse*1

Min.: 128

Max.: 383

Operates between 255 to 347 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

A/O Servo Pulse(Rr D)

No. 2 air conditioning radiator damper servo sub-assembly pulse*3

Min.: 128

Max.: 383

Operates between 158 to 260 pulses
  • *1: for Dual Type
  • *2: for Single Type
  • *3: w/ Rear Center Register

Body Electrical > Air Conditioner > Active Test

Tester Display

Air Mix Servo Targ Pulse(D)

Body Electrical > Air Conditioner > Active Test

Tester Display

Air Mix Servo Targ Pulse(P)

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

Body Electrical > Air Conditioner > Active Test

Tester Display

A/O Servo Pulse(Rr D)

OK:

Each damper servo motor operates.

OK

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY

NG

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR