Toyota Camry (XV70): Air Conditioning Compressor Magnetic Clutch Circuit

Toyota Camry Repair Manual XV70 (2018-2024) / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System (for Automatic Air Conditioning System) / Air Conditioning Compressor Magnetic Clutch Circuit

DESCRIPTION

When the engine is running, If refrigerant pressure does not decrease when the A/C switch is turned off, the following suspected areas may be the cause.

Symptom	Factor
Cooler compressor assembly does not stop operating Refrigerant pressure does not decrease when A/C switch is turned off	Short to +B in air conditioning amplifier assembly circuit malfunction Magnetic clutch relay malfunction Magnetic clutch assembly malfunction Harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	INSPECT MAGNETIC CLUTCH RELAY

(a) Remove the magnetic clutch relay.

(b) Inspect the magnetic clutch relay.

Click here

REPLACE MAGNETIC CLUTCH RELAY

2.	CHECK HARNESS AND CONNECTOR (MAGNETIC CLUTCH RELAY - POWER SOURCE)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
Relay terminal 3 - Body ground	Always	11 to 14 V
Relay terminal 1 - Body ground	Ignition switch off	Below 1 V
Relay terminal 1 - Body ground	Ignition switch ON	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (MAGNETIC CLUTCH RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the K55 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Relay terminal 2 - K55-9 (MGC)	Always	Below 1 ?
Relay terminal 2 or K55-9 (MGC) - Other terminals and body ground	Always	10 k? or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (MAGNETIC CLUTCH RELAY - MAGNET CLUTCH ASSEMBLY AND BODY GROUND)

(a) Disconnect the C63 magnet clutch assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Relay terminal 5 - C63-3 (MG+)	Always	Below 1 ?
Relay terminal 5 - C63-3 (MG+) - Other terminals and body ground	Always	10 k? or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK HARNESS AND CONNECTOR (MAGNET CLUTCH ASSEMBLY - BODY GROUND)

(a) Install the magnetic clutch relay.

(b) Connect the C63 magnet clutch assembly connector.

Standard Voltage:

Tester Connection	Condition	Specified Condition
C63-3 (MG+) - Body ground	Engine running (A/C switch: Off)	Below 1 V

Tester Connection

Condition

Specified Condition

C63-3 (MG+) - Body ground

Engine running

(A/C switch: Off)

Below 1 V

REPLACE MAGNET CLUTCH ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

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Toyota Camry (XV70): Air Conditioning Compressor Magnetic Clutch Circuit

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