Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: On-vehicle Inspection

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning Pressure Sensor / On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT AIR CONDITIONER PRESSURE SENSOR

(a) Check the wire harness.

(1) Disconnect the A9 air conditioner pressure sensor connector.

(2) Disconnect the J42 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A9-1 (-) - J42-3 (SG-4)

Always

Below 1 Ω

A9-2 (PR) - J42-24 (PRE)

Always

Below 1 Ω

A9-3 (+) - J42-6 (S5-3)

Always

Below 1 Ω

A9-1 (-) - Body ground

Always

10 kΩ or higher

A9-2 (PR) - Body ground

Always

10 kΩ or higher

A9-3 (+) - Body ground

Always

10 kΩ or higher

If the resistance is not as specified, repair the wire harness.

(4) Reconnect the J42 air conditioning amplifier assembly connector.

(5) Turn the engine switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A9-3 (+) - Body ground

Engine switch on (IG)

4.75 to 5.25 V

If the voltage is not as specified, repair the wire harness or replace air conditioning amplifier assembly.

(b) Check the air conditioner pressure sensor.

(1) Connect the connector to the air conditioner pressure sensor.

(2) Install a manifold gauge set.

(3) Warm up the engine.

(4) Turn the A/C switch on.

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

HINT:

Check from the rear of the connector while it is connected to the air conditioning amplifier assembly.

Standard Voltage:

Tester Connection

Condition

Specified Condition

J42-24 (PRE) - J42-3 (SG-4)

Refrigerant pressure: Normal pressure (less than 3025 kPa (30.8 kgf/cm2, 439 psi) and more than 176 kPa (1.8 kgf/cm2, 26 psi))

0.74 to 4.61 V

If the voltage is not as specified, replace the air conditioner pressure sensor.

*a

Component with harness connected

(Air Conditioning Amplifier Assembly)
    Components
    COMPONENTS ILLUSTRATION *1 AIR CONDITIONER PRESSURE SENSOR - - N*m (kgf*cm, ft.*lbf): Specified torque ● Non-reusable part Compressor oil ND-OIL 12 or equivalent - - ...

    Removal
    REMOVAL PROCEDURE 1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM Click here 2. REMOVE AIR CONDITIONER PRESSURE SENSOR (a) Disconnect the connector. (b) Using a 27 mm deep socket wrench, remov ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Sfi System: Fuel Rail / System Pressure - Too High (P008800)
    DESCRIPTION Refer to DTC P008700. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P008800 Fuel Rail / System Pressure - Too High Although the ECM is requesting the fuel pump assembly (for high pressure side) to open the spill control va ...

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Front Camera System: Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2026 Copyright www.lexusrx.net
    0.009