Toyota Camry (XV70): Cooling System

Toyota Camry Repair Manual XV70 (2018-2024) / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System (for Automatic Air Conditioning System) / 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) malfunction1 Cooler compressor assembly (compressor solenoid) malfunction2 Refrigerant volume (high) Refrigerant volume (low) Clogged cooler condenser assembly fins Cooling fan system malfunction Mechanical locking of damper and damper link Automatic light control sensor malfunction High inlet air temperature Harness or connector

*1: for A25A-FKS
*2: for 2GR-FKS

WIRING DIAGRAM

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 (driver side air mix1 or air mix2) 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
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 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:

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

NG

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR

OK

3.	INSPECT WIRE HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the M1 automatic light control sensor connector.

(b) Disconnect the K52 main body ECU (multiplex network body ECU) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
M1-1 (CLTB) - K52-23 (CLTB)	Always	Below 1 ?
M1-2 (CLTE) - K52-25 (CLTE)	Always	Below 1 ?
M1-4 (CLTS) - K52-24 (CLTS)	Always	Below 1 ?
M1-1 (CLTB) or K52-23 (CLTB) - Other terminals and body ground	Always	10 k? or higher
M1-2 (CLTE) or K52-25 (CLTE) - Other terminals and body ground	Always	10 k? or higher
M1-4 (CLTS) or K52-24 (CLTS) - Other terminals and body ground	Always	10 k? or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.	INSPECT AUTOMATIC LIGHT CONTROL SENSOR

(a) Remove the automatic light control sensor.

Click here

(b) Inspect the automatic light control sensor.

Click here

OK

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

NG

REPLACE AUTOMATIC LIGHT CONTROL SENSOR

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