Dtc B1451/51 Compressor Solenoid Circuit

Heater & Air Conditioning System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Air Conditioning. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (REG CTRL CURRNT)

INSPECT A/C COMPRESSOR

CHECK WIRE HARNESS (A/C COMPRESSOR - AIR CONDITIONING AMPLIFIER)

CHECK WIRE HARNESS (A/C COMPRESSOR - BODY GROUND)

DTC B1451/51 Compressor Solenoid Circuit


DESCRIPTION

In this circuit, the compressor receives a refrigerant compression demand signal from the air conditioning amplifier. Based on this signal, the compressor changes the degree of refrigerant compression.

DTC No.
DTC Detection Condition
Trouble Area
B1451/51
Open or short in solenoid of externally changeable compressor circuit
  1. A/C compressor*
  2. Harness and connector between air conditioning amplifier and A/C compressor*
  3. Air conditioning amplifier
HINT:
*: Compressor and pulley for except 2GR-FE, compressor and magnetic clutch for 2GR-FE

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1451/51 Compressor Solenoid Circuit


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (REG CTRL CURRNT)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the intelligent tester main switch ON.

  1. Select the items below in the DATA LIST, and read the value displayed on the intelligent tester.

    Air conditioning amplifier:

    Item
    		Measurement Item / Display (Range)
    		Normal Condition
    		Diagnostic Note
    Regulator Control Current
    		Regulator control current /
    Min.: 0 A
    Max.: 0.997 A
    		Value changes between 0 A and 0.997 A in accordance with A/C compressor operation
    		-
    OK:
    The display is as specified in the normal condition column.

    Result:

    Result
    		Proceed to
    NG
    		A
    OK (Checking from the PROBLEM SYMPTOMS TABLE)
    		B
    OK (Checking from the DTC)
    		C


B
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C
REPLACE AIR CONDITIONING AMPLIFIER
A


2.INSPECT A/C COMPRESSOR
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1451/51 Compressor Solenoid Circuit

  1. Disconnect the A/C compressor connector.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 (SOL-) - 2 (SOL+)
    		25°C (77°F)
    		10.1 to 11.1 Ω


NG
REPLACE A/C COMPRESSOR
OK


3.CHECK WIRE HARNESS (A/C COMPRESSOR - AIR CONDITIONING AMPLIFIER)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1451/51 Compressor Solenoid Circuit

  1. Disconnect the B23 or B40 A/C compressor connector.

  1. Disconnect the E42 amplifier connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B23-2 (SOL+) - E42-13 (SOL+) (*1)
    		Below 1 Ω
    B23-2 (SOL+) - Body ground (*1)
    		1 MΩ or higher
    B40-2 (SOL+) - E42-13 (SOL+) (*2)
    		Below 1 Ω
    B40-2 (SOL+) - Body ground (*2)
    		1 MΩ or higher
    *1: for Except 2AD-FTV, 2AD-FHV
    *2: for 2AD-FTV, 2AD-FHV


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK WIRE HARNESS (A/C COMPRESSOR - BODY GROUND)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1451/51 Compressor Solenoid Circuit

  1. Disconnect the B23 or B40 A/C compressor connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B23-1 (SOL-) - Body ground (*1)
    		Below 1 Ω
    B40-1 (SOL-) - Body ground (*2)
    		Below 1 Ω
    *1: for Except 2AD-FTV, 2AD-FHV
    *2: for 2AD-FTV, 2AD-FHV


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER