Compressor Solenoid Circuit - Air Conditioning System

AIR CONDITIONING: 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. INSPECT A/C COMPRESSOR

(a) 2GR-FSE





(1) Disconnect the E46 A/C compressor connector.

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

Standard resistance:





(b) 1UR-FSE





(1) Disconnect the E1 A/C compressor connector.

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

Standard resistance:





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

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

(a) 2GR-FSE





(1) Disconnect the E46 A/C compressor connector.

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

Standard resistance:





(b) 1UR-FSE





(1) Disconnect the E1 A/C compressor connector.

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

Standard resistance:





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

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





(a) Disconnect the E46 or E1 A/C compressor connector.

(b) Disconnect the K52 A/C amplifier connector.

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

Standard resistance:





HINT
* *1: 2GR-FSE
* *2: 1UR-FSE

Result:





C -- REPLACE AIR CONDITIONING AMPLIFIER

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

A -- REPAIR OR REPLACE HARNESS AND CONNECTOR