AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System), Diagnostic DTC:B1451/51

DTC Code DTC Name
B1451/51 Compressor Solenoid Circuit

DESCRIPTION

In this circuit, the compressor assembly with pulley (compressor solenoid) receives a refrigerant compression demand signal from the air conditioning amplifier assembly.

Based on this signal, the compressor assembly with pulley (compressor solenoid) changes the amount of compressor output.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

B1451/51

Compressor Solenoid Circuit

Open or short in compressor solenoid circuit

  • Compressor assembly with pulley (compressor solenoid)

  • Harness or connector between air conditioning amplifier assembly and compressor assembly with pulley (compressor solenoid)

  • Air conditioning amplifier assembly

-

WIRING DIAGRAM

E229254E26

PROCEDURE

  1. INSPECT COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)

    1. Disconnect the B7 compressor assembly with pulley (compressor solenoid) connector.

    2. E116970C05

      *a

      Component without harness connected

      (Compressor Assembly with Pulley (Compressor Solenoid))

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      1 (SOL-) - 2 (SOL+)

      20°C (68°F)

      10.1 to 11.1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)

    for 1AD-FTV:Click here

    for 1ND-TV:Click here

    for 1NR-FE:Click here

    for 1ZR-FAE:Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) - BODY GROUND)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B7-1 (SOL-) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

    1. Disconnect the E28 air conditioning amplifier assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E28-2 (SOL+) - B7-2 (SOL+)

      Always

      Below 1 Ω

      E28-2 (SOL+) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      Proceed to

      NG

      A

      OK (When troubleshooting according to the Problem Symptoms Table)

      B

      OK (When troubleshooting according to the DTC)

      C
    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    C

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

    Click here