Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001R3ZW
Model Year Start: 2021 Model: Camry Prod Date Range: [10/2020 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): Cooling System; 2021 - 2024 MY Camry [10/2020 -        ]

Cooling System

DESCRIPTION

If the cooling effect of the air conditioning system is weak, the following suspected areas may be the cause.

Symptom

Factor
  • Cooling effectiveness is poor
  • Cooling response is slow
  • Compressor assembly with pulley (compressor solenoid) malfunction
  • Air conditioning amplifier assembly malfunction
  • Refrigerant volume (high)
  • Refrigerant volume (low)
  • Clogged cooler condenser assembly fins
  • Cooling fan system malfunction
  • Mechanical locking of damper and damper link
  • High inlet air temperature

PROCEDURE

1.

PERFORM REFRIGERANT SHORTAGE CHECK

(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 / Utility / Refrigerant Gas Volume Check.

Body Electrical > Air Conditioner > Utility

Tester Display

Refrigerant Gas Volume Check

(e) Check that the following conditions are met and perform the refrigerant shortage check according to the display on the Techstream.

Measurement Condition:

Item

Condition

A/C switch

On

Ambient temperature*

0 to 49°C (32 to 120°F)

Blower speed

HI

*: If the ambient temperature is not within the range shown, do not perform this check.

Result

Amount of Refrigerant

Refrigerant correct

Correct

Refrigerant shortage

Insufficient

OK:

"Refrigerant correct" is displayed on Techstream.

NG

REPAIR REFRIGERANT LEAK

OK

2.

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

Blower Motor

Blower motor with fan sub-assembly

Min.: 0

Max.: 31

-

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

Blower Motor

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:

The blower motor with fan sub-assembly and each damper servo motor operates.

OK

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

NG

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR