Automatic Air Conditioning System

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 compressor assembly with pulley receives a refrigerant compression demand signal from the air conditioning amplifier.

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT COMPRESSOR ASSEMBLY WITH PULLEY

(a) Disconnect the compressor assembly with pulley (compressor solenoid) connector.





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

Standard Resistance:





*1: for TMC Made

*2: except TMC Made

Text in Illustration





Result:





C -- REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (for 2ZR-FE) Removal

B -- REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (for 2AZ-FE) Removal
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY - BODY GROUND)

(a) Disconnect the compressor assembly with pulley (compressor solenoid) connector.





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

Standard Resistance:





*1: for TMC Made

*2: except TMC Made

Text in Illustration





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

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

(a) Disconnect the compressor assembly with pulley (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:





*1: for TMC Made

*2: except TMC 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