AC/Air Conditioning System — Pressure Switch, page 32

AC-32     AIR CONDITIONING SYSTEM — Pressure Switch, Water Temperature Switch

PRESSURE SWITCH
(See page AC-8)

ON-VEHICLE INSPECTION

1. DISCONNECT CONNECTOR OF PRESSURE SWITCH

2. INSPECT PRESSURE SWITCH
(a) Install the manifold gauge set. (See page AC-21)
(b) Observe the gauge reading.
(c) Check the continuity between two terminals of the pressure switch shown in the below.

Dual Pressure Switch

                                    2.1 kg/cm²        27 kg/cm²
                                    (30 psi, 206 kPa)  (384 psi, 2,648 kPa)
                     ON                 │                │      ON
                (Continuity)            │                │
                                        │                │
                     OFF                │                │      OFF
                (No continuity)         │                │
                                    2.35 kg/cm²      21.0 kg/cm²
                                    (33 psi, 230 kPa) (299 psi, 2,059 kPa)

                                                                        AC1M6

If defective, replace the pressure switch.


WATER TEMPERATURE SWITCH

HINT: The water temperature switch is under the heater radiator.

INSPECTION OF WATER TEMPERATURE NSWITCH NO. 1

INSPECT SWITCH CONTINUITY

              Terminals         1    2    3    4
Water Temp.
15°C (59°F) or below              No continuity
25°C (77°F) or more          ○─────────────────○
45°C (113°F) or more         ○─────○────○───────○


                        15°C    25°C   ON
                    ┌──┬──┐
                    │  1  2 │   OFF
                    │  4  3 │
                    └──┴──┘
                        35°C    45°C   ON

                                OFF
                                                    AC1386