AIR CONDITIONING SYSTEM, Diagnostic DTC:B1451/51

DTC Code DTC Name
B1451/51 Compressor Solenoid Circuit

DESCRIPTION

In this circuit, the A/C compressor receives a refrigerant compression demand signal from the A/C amplifier.

Based on this signal, the A/C compressor changes the amount of compressor output.

DTC No. DTC Detection Condition Trouble Area
B1451/51 Open or short in A/C compressor solenoid circuit
  • A/C compressor

  • Harness or connector between A/C amplifier and A/C compressor

  • A/C amplifier

WIRING DIAGRAM

A01635PE01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT A/C COMPRESSOR


    1. A015YYZE22

      Remove the A/C compressor.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E63-2 (SOL+) - E63-1 (SOL-) 20°C (68°F) 10 to 11 Ω

    NG
    OK
  2. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - BODY GROUND)


    1. A015ZVVE32

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E63-1 (SOL-) - Body ground Always Below 1 Ω

    NG
    OK
  3. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - A/C AMPLIFIER)


    1. A0162IGE09

      Disconnect the A/C amplifier connector.

    2. A015ZVVE33

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J58-5 (SOL+) - E63-2 (SOL+) Always Below 1 Ω
      J58-5 (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

    B
    C
    A