Air Conditioning Compressor Magnetic Clutch Circuit

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): Air Conditioning Compressor Magnetic Clutch Circuit
- Air Conditioning Compressor Magnetic Clutch Circuit

DESCRIPTION

When the air conditioning amplifier assembly is turned on, a magnet clutch assembly ON signal is sent from the MGC terminal of the air conditioning amplifier assembly. Then, the A/C COMP relay turns on to operate the magnet clutch assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

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

PROCEDURE

1. INSPECT MAGNET CLUTCH RELAY (A/C COMP)

(a) Remove the A/C COMP relay from the engine room No. 1 relay block, junction block.





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

Standard Resistance:





NG -- REPLACE MAGNET CLUTCH RELAY (A/C COMP)
OK -- Continue to next step.

2. INSPECT COOLER COMPRESSOR ASSEMBLY

(a) Remove the cooler compressor assembly Removal.





(b) Disconnect the A magnet clutch connector.

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

Standard Resistance:





NG -- REPLACE COOLER COMPRESSOR ASSEMBLY Removal
OK -- Continue to next step.

3. INSPECT MAGNETIC CLUTCH ASSEMBLY

(a) Reconnect the A magnet clutch connector.





(b) Apply battery voltage to the magnet clutch assembly and check the operation of the magnet clutch assembly.

OK:





NG -- REPLACE MAGNET CLUTCH ASSEMBLY Disassembly
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - BATTERY)

(a) Remove the A/C COMP relay from the engine room No. 1 relay block, junction block.





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

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)

(a) Disconnect the F42 amplifier connector.





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

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - COOLER COMPRESSOR)

(a) Remove the A/C COMP relay from the engine room No. 1 relay block, junction block.

(b) Disconnect the B41 compressor connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Air Conditioning System (for Manual Air Conditioning System)