Up to 08/2009

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1451/51: Compressor Solenoid Circuit
B1451/51 - Compressor Solenoid Circuit

DESCRIPTION

In this circuit, the A/C compressor receives a refrigerant compression demand signal from the A/C amplifier.

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT A/C COMPRESSOR (SOLENOID VALVE)

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





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

Standard Resistance:





Text in Illustration





NG -- REPLACE A/C COMPRESSOR (SOLENOID VALVE) Removal
OK -- Continue to next step.

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

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





Standard Resistance:





Text in Illustration





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

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

(a) Disconnect the A/C amplifier connector.





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





Standard Resistance:





Result:





Text in Illustration





C -- REPLACE A/C AMPLIFIER

B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR