B1451

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): B1451: Compressor Solenoid Circuit
B1451 - Compressor Solenoid Circuit

DESCRIPTION

Through this circuit, the compressor receives a refrigerant compression demand signal from the air conditioning amplifier.

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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

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





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

Standard Resistance:





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

2. INSPECT A/C COMPRESSOR (COMPRESSOR SOLENOID)

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





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

Standard Resistance:





Result:





C -- REPLACE A/C COMPRESSOR (for 2ZR-FE) Removal

B -- REPLACE A/C COMPRESSOR (for 2AZ-FE) Removal
A -- Continue to next step.

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

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





(b) Disconnect the A/C amplifier connector.





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

Standard Resistance:





Result:





C -- REPLACE AIR CONDITIONING AMPLIFIER Removal

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR