Automatic Air Conditioning

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

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

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Air Conditioning System (For Automatic Air Conditioning System)

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR