B1451

AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1451: Compressor Solenoid Circuit

DTC B1451 - 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 amount of compressor output.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT A/C COMPRESSOR (COMPRESSOR SOLENOID)




(a) Disconnect the B7 A/C compressor (compressor solenoid) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(c) Reconnect the A/C compressor (compressor solenoid) connector.
NG -- REPLACE A/C COMPRESSOR
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - BODY GROUND)




(a) Disconnect the B7 A/C compressor (compressor solenoid) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(c) Reconnect the A/C compressor (compressor solenoid) connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - A/C AMPLIFIER)




(a) Disconnect the B7 A/C compressor (compressor solenoid) connector.




(b) Disconnect the C8 A/C amplifier connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






Result:





(d) Reconnect the A/C compressor (compressor solenoid) connector.
(e) Reconnect the A/C amplifier connector.
C -- REPLACE AIR CONDITIONING AMPLIFIER
B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- REPAIR OR REPLACE HARNESS OR CONNECTOR