Toyota Corolla 2004 Repair Manual - AIR CONDITIONING SYSTEM

55–2

ON–VEHICLE INSPECTION

–HEATER & AIR CONDITIONER AIR CONDITIONING SYSTEM

550IO–01

1

2

Low pressure side High pressure side

(2.0 kgf/cm2 28 psi)

OFF (No continuity) OFF (No continuity)

2

OFF
(No continuity)

4

ON (Continuity)

(132.0 kgf/cm2 455 psi)

1

4
1,226 kpa
(12.5 kgf/cm2 178 psi)

1,520 kpa
(15.5 kgf/cm2 220 psi)

3

3,140 kpa196 kpa

I30146

3

ON
(Continuity)

1. INSPECT PRESSURE SWITCH NO.1.

(a) Magnetic clutch control:

Inspect pressure switch operation.
(1) Set on the manifold gauge set.
(2) Connect the positive (+) lead from the ohmmeter to

terminal 4 and the negative (–) lead to terminal 1.

(3) Check continuity between terminals when refriger-

ant pressure is changed, as shown in the illustra­tion.

If operation is not as specified, replace the pressure switch.

(b) Cooling fan control:

Inspect pressure switch operation.
(1) Connect the positive (+) lead from the ohmmeter to

terminal 2 and the negative (–) lead to terminal 3.

(2) Check continuity between terminals when refriger-

ant pressure is changed, as shown in the illustra­tion.

If operation is not as specified, replace the pressure switch.

I30291

2. COOLER COMPRESSOR ASSY W/MAGNETIC CLUTCH

(a) Connect the positive (+) lead from the battery to terminal and the negative (–) lead to the body ground.
(b) Check that the magnetic clutch energized.
If operation is not as specified, replace the magnet clutch assy.

2004 COROLLA (RM1037U)

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