Compressor Solenoid Circuit - Air Conditioning System (for Automatic Air Conditioning System)

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B1451/51: Compressor Solenoid Circuit

DTC B1451/51 - Compressor Solenoid Circuit

DESCRIPTION

Through this circuit, the A/C compressor receives a refrigerant compression demand signal from the air conditioning 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




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





*1: TMC Made
*2: NUMMI, TMMC Made
Result:






C -- REPLACE A/C COMPRESSOR (for 2ZR-FE)
B -- REPLACE A/C COMPRESSOR (for 2AZ-FE)
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - BODY GROUND)




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





*1: TMC Made
*2: NUMMI, TMMC Made
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 A/C compressor connector.




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





*1: TMC Made
*2: NUMMI, TMMC Made
Result:






C -- REPLACE AIR CONDITIONING AMPLIFIER
B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- REPAIR OR REPLACE HARNESS OR CONNECTOR