Air Conditioning Compressor Magnetic Clutch Circuit

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 is turned on, a magnetic clutch ON signal is sent from the MGC terminal of the air conditioning amplifier. Then, the magnetic clutch relay (MG CLT) turns on to operate the magnetic clutch.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (A/C SIGNAL)

(a) Use the Data List to check if the air conditioning signal is functioning properly.

ECM





OK:

The display is as specified in the normal condition.

NG -- INSPECT FUSE (A/C IG)

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

2. INSPECT FUSE (A/C IG)

(a) Remove the A/C IG fuse from the main body ECU.

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

Standard resistance:





NG -- REPLACE FUSE
OK -- Continue to next step.

3. INSPECT MAGNETIC CLUTCH RELAY (MG CLT)





(a) Remove the magnetic clutch relay from the engine room relay block.

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

Standard resistance:





NG -- REPLACE MAGNETIC CLUTCH RELAY
OK -- Continue to next step.

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





(a) Disconnect the J19 air conditioning amplifier connector.

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

Standard voltage:





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

5. CHECK AIR CONDITIONING AMPLIFIER (MGC VOLTAGE)





(a) Reconnect the J19 air conditioning amplifier connector.

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

Standard voltage:





NG -- REPLACE AIR CONDITIONING AMPLIFIER Removal
OK -- Continue to next step.

6. INSPECT AIR CONDITIONING COMPRESSOR (COMPRESSOR HARNESS)





(a) Disconnect the D60 air conditioning compressor connector.

(b) Disconnect the magnetic clutch connector.

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

Standard resistance:





NG -- REPAIR AIR CONDITIONING COMPRESSOR
OK -- Continue to next step.

7. INSPECT MAGNETIC CLUTCH

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





Standard resistance:





(b) When connector terminal 1 is connected to the positive (+) battery terminal, check that the following occurs: 1) the magnetic clutch's operating sound can be heard, and 2) the magnetic clutch's hub and rotor lock.

Result





D -- REPLACE MAGNETIC CLUTCH

C -- REPLACE MAGNETIC CLUTCH Disassembly

B -- REPLACE MAGNETIC CLUTCH Disassembly
A -- Continue to next step.

8. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING COMPRESSOR - ENGINE ROOM RELAY BLOCK)





(a) Disconnect the D60 air conditioning compressor connector.

(b) Remove the magnetic clutch relay (MG CLT) from the engine room relay block.

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

Standard resistance:





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

9. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - BATTERY)





(a) Remove the magnetic clutch relay (MG CLT) from the engine room relay block.

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

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER Removal