Manual Air Conditioning

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual 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.





HINT
*: Compressor and pulley for 2AR-FE, compressor and magnetic clutch for 2GR-FE

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:





C -- REPLACE AIR CONDITIONING AMPLIFIER

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- Continue to next step.

2. INSPECT A/C COMPRESSOR





(a) Disconnect the A/C compressor connector.

(b) Measure the resistance of the connector.

Standard resistance:





NG -- REPLACE A/C COMPRESSOR
OK -- Continue to next step.

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





(a) Disconnect the B23 A/C compressor connector.

(b) Disconnect the E36 amplifier connector.

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

Standard resistance:





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

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





(a) Disconnect the B23 A/C compressor connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER