Air Conditioning System (For Automatic Air Conditioning System)

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

DTC B1451/51 - 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 degree of refrigerant compression.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch on (IG) and turn Techstream main switch on.
(c) Select the items below in the Data List, and read the value displayed on Techstream.

Data List / Air Conditioner





OK:
The display is as specified in the normal condition column.
Result:






C -- REPLACE AIR CONDITIONING AMPLIFIER
B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- Continue to next step.
2. INSPECT COMPRESSOR AND MAGNETIC CLUTCH
(a) Disconnect the compressor and magnetic clutch connector.




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






NG -- REPLACE COMPRESSOR AND MAGNETIC CLUTCH
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (COMPRESSOR AND MAGNETIC CLUTCH - AIR CONDITIONING AMPLIFIER)




(a) Disconnect the B45 compressor and magnetic clutch connector.
(b) Disconnect the D37 amplifier connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (COMPRESSOR AND MAGNETIC CLUTCH - BODY GROUND)




(a) Disconnect the B45 compressor and magnetic clutch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING AMPLIFIER