Dtc 23 Pressure Switch Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK REFRIGERANT PRESSURE

CHECK AIR CONDITIONING OPERATION

CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER AND BODY GROUND)

DTC 23 Pressure Switch Circuit


DESCRIPTION


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 23 Pressure Switch Circuit

The air conditioner pressure sensor turns off when the air conditioning refrigerant pressure extremely (0.196 MPa [2.0 kgf/cm2], 28 psi] or less) or extremely high (3.14 MPa [32.0 kgf/cm2, 455 psi] or more). When the air conditioning amplifier assembly detects the off state of the air conditioner pressure sensor, the air conditioning amplifier assembly outputs signals to the magnet clutch relay to turn the magnet clutch off.

DTC Code
DTC Detection Condition
Trouble Area
23
When either condition below is met:
  1. An open in pressure switch circuit
  2. Abnormal refrigerant pressure:
    1. 0.196 MPa (2.0 kgf/cm2, 28 psi) or less
    2. 3.14 MPa (32.0 kgf/cm2, 455 psi) or high
  1. Air conditioner tube & accessory assembly (air conditioner pressure sensor)
  2. Refrigerant and refrigerant pipe line
  3. Air conditioning amplifier assembly
  4. Harness or connector

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 23 Pressure Switch Circuit


INSPECTION PROCEDURE

1.CHECK REFRIGERANT PRESSURE

  1. Install a manifold gauge.

  1. Check refrigerant pressure (Toyota Fortuner RM000000VTF00GX.html).

    Standard Pressure:
    Pressure on high-pressure side
    1.37 to 1.57 MPa (13.9 to 16.0 kgf/cm2, 198 to 228 psi)
    HINT:
    If the refrigerant pressure is below 0.196 MPa (2.0 kgf/cm2, 28 psi), the refrigerant amount in the air conditioning cycle may have decreased significantly due to gas leakage or other problems.


NG
CHECK REFRIGERANT AND REFRIGERANT PIPE LINE
OK


2.CHECK AIR CONDITIONING OPERATION


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 23 Pressure Switch Circuit

  1. Disconnect the P2 air conditioner pressure sensor connector.

  1. Using a service wire, connect terminals 1 and 2 of the connector on the vehicle wire harness side.

  1. Start the engine.

  1. Turn the A/C switch on and check the magnet clutch.

    OK:
    With terminals 1 and 2 connected, magnet clutch is on.
    With terminals 1 and 2 disconnected, magnet clutch is off.
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Air Conditioner Pressure Sensor)


NG
Go to step 3
OK

REPLACE AIR CONDITIONING TUBE & ACCESSORY ASSEMBLY (AIR CONDITIONER PRESSURE SENSOR)

3.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER AND BODY GROUND)

  1. Disconnect the P2 air conditioner pressure sensor connector.

  1. Disconnect the A37 air conditioning amplifier assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    P2-2 - A37-5 (PSW)
    		Always
    		Below 1 Ω
    P2-1 - Body ground
    P2-2 - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK (When troubleshooting according to problem symptoms table.)
    		A
    OK (When troubleshooting according to DTC.)
    		B
    NG
    		C


B
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Toyota Fortuner RM000001K3A018X.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Toyota Fortuner RM0000045E300YX.html)