PRESSURE SWITCH ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT NO. 1 PRESSURE SWITCH (w/o Condenser Fan)


    1. Disconnect the connector.

    2. B003LJEC04
      *a

      Front view of wire harness connector

      (No. 1 Pressure Switch)

      Using a service wire, connect terminals 1 (S+) and 2 (S-) of the No. 1 pressure switch connector on the vehicle wire harness side.

    3. Start the engine.

    4. Turn the A/C switch on and check that the magnet clutch turns on.

    5. Check that the magnet clutch turns off when disconnecting terminals 1 (S+) and 2 (S-).

      OK
      Measurement Condition Specified Condition
      Terminals 1 (S+) and 2 (S-) connected Magnet clutch turns on
      Terminals 1 (S+) and 2 (S-) disconnected Magnet clutch turns off

      If the result is not as specified, replace the No. 1 pressure switch.

  2. INSPECT NO. 1 PRESSURE SWITCH (w/ Condenser Fan)


    1. Disconnect the connector.

    2. Start the engine.

    3. Turn the A/C switch on and check that the magnet clutch turns on.

    4. B003OANC01
      *a

      Component without harness connected

      (No. 1 Pressure Switch)
      *b High Pressure Side
      *c Low Pressure Side
      *d ON (Continuity)
      *e OFF (No Continuity)
      *f

      176 to 216 kPa (1.8 to 2.2 kgf/cm2, 26 to 31 psi)
      *g

      196 to 250 kPa (2.0 to 2.5 kgf/cm2, 28 to 36 psi)
      *h

      3140 to 3340 kPa (32.0 to 34.1 kgf/cm2, 455 to 484 psi)

      High Pressure Side, Low Pressure Side (Magnet Clutch Control):

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

      OK
      Measurement Condition Refrigerant Volume Specified Condition
      1 (S+) - 4 (S-) See the graph Below 1 Ω
      1 (S+) - 4 (S-) 10 kΩ or higher

      If the result is not as specified, replace the No. 1 pressure switch.

    5. B003KPRC01
      *a

      Component without harness connected

      (No. 1 Pressure Switch)
      *b ON (Continuity)
      *c OFF (No Continuity)
      *d

      111 to 135 kPa (1.1 to 1.4 kgf/cm2, 16 to 20 psi)
      *e

      144 to 160 kPa (1.5 to 1.6 kgf/cm2, 21 to 23 psi)

      Middle Pressure Side (Condenser Fan Control):

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

      OK
      Measurement Condition Refrigerant Volume Specified Condition
      2 (S+) - 3 (S-) See the graph Below 1 Ω
      2 (S+) - 3 (S-) 10 kΩ or higher

      If the result is not as specified, replace the No. 1 pressure switch.