Air Conditioning System (for Automatic Air Conditioning System)

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B1451/51: Compressor Solenoid Circuit
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.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream ON.

(c) Select the items below in the Data List, and read the value displayed on the Techstream.

Air conditioning amplifier:





OK:

The display is as specified in the normal condition column.

Result:





B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C -- REPLACE AIR CONDITIONING AMPLIFIER
A -- Continue to next step.

2. INSPECT COOLER COMPRESSOR ASSEMBLY





(a) Disconnect the compressor connector.

(b) Measure the resistance of the connector.

Standard resistance:





NG -- REPLACE COOLER COMPRESSOR ASSEMBLY
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY - AIR CONDITIONING AMPLIFIER)





(a) Disconnect the B23 compressor connector.

(b) Disconnect the E37 amplifier connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY - BODY GROUND)





(a) Disconnect the B23 compressor connector.

(b) Measure the resistance of the wire harness side connector.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER