Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM10000000159BE
Model Year Start: 2018 Model: Camry Prod Date Range: [06/2017 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): Air Conditioning Compressor Magnetic Clutch Circuit; 2018 - 2024 MY Camry [06/2017 -        ]

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 2018 - 2024 MY Camry [06/2017 -        ]; HEATING / AIR CONDITIONING: RELAY: ON-VEHICLE INSPECTION

NG

REPLACE MAGNETIC CLUTCH RELAY
OK

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
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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 Ω

Relay terminal 2 or K55-9 (MGC) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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 Ω

Relay terminal 5 - C63-3 (MG+) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

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

(a) Install the magnetic clutch relay.

(b) Connect the C63 magnet clutch assembly connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

C63-3 (MG+) - Body ground

Engine running

(A/C switch: Off)

Below 1 V
OK

REPLACE MAGNET CLUTCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR