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) for 1GR-FE:
Remove the cooler compressor assembly Removal.
(b) for 2TR-FE:
Remove the cooler compressor assembly Removal.
(c) Disconnect the A magnet clutch connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Result
C -- REPLACE COOLER COMPRESSOR ASSEMBLY Removal
B -- REPLACE COOLER COMPRESSOR ASSEMBLY Removal
A -- 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:
Result
C -- REPLACE MAGNET CLUTCH ASSEMBLY Disassembly
B -- REPLACE MAGNET CLUTCH ASSEMBLY Disassembly
A -- 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)