Toyota Camry (XV70): 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 |
|---|---|
|
|
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.
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| NG | .gif) | REPLACE MAGNETIC CLUTCH RELAY |
|
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| 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 |
|
| 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 |
| NG | | 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 |
| NG | | 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.
(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 |
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NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
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Installation
INSTALLATION PROCEDURE 1. INSTALL ENGINE WATER PUMP ASSEMBLY
(a) Install a new water pump gasket and the engine water pump assembly with the 15 bolts.
Torque: Bolt (A) : 43 N·m {438 kgf·cm, 32 ft·lbf} Bolt (B) :
21 N·m {214 kgf·cm, 15 ft·lbf} Bolt (C) : 11 N·m {112 kgf·cm, 8
