Dtc 23 Pressure Switch Circuit

Vehicle Interior. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Heating Air Conditioning. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK REFRIGERANT PRESSURE

CHECK AIR CONDITIONING OPERATION

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

DTC 23 Pressure Switch Circuit


DESCRIPTION


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Heating 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 air conditioner pressure sensor 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


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Heating 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 (HILUX_TGN26 RM000001R8Z02GX.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


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 23 Pressure Switch Circuit

  1. Disconnect the A16 air conditioner pressure sensor connector.

  1. Check the air conditioning operation.

    OK:
    Measurement Condition
    		Specified Condition
    1. Engine idling
    2. A/C switch on
    3. Blower switch on (LO level)
    4. Connect terminals A16-1 and A16-2
    		Magnet clutch is on
    1. Engine idling
    2. A/C switch on
    3. Blower switch on (LO level)
    4. Disconnect terminals A16-1 and A16-2
    		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 CONDITIONER TUBE & ACCESSORY ASSEMBLY (AIR CONDITIONER PRESSURE SENSOR) (HILUX_TGN26 RM0000030JI030X.html)

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

  1. Disconnect the A16 air conditioner pressure sensor connector.

  1. Disconnect the G95 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
    A16-2 - G95-5 (PSW)
    		Always
    		Below 1 Ω
    A16-1 - Body ground
    G95-5 (PSW) - 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 (HILUX_TGN26 RM000001K3A024X.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (HILUX_TGN26 RM0000045E301VX.html)