B1451

AIR CONDITIONING: 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 (REGULATOR CONTROL CURRENT)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Select the following menus: Body Electrical / Air Conditioner / Data List /
(e) According to the display on tester, read the "Data List".
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 PULLEY




(a) Disconnect the C8 compressor and pulley connector.
(b) Measure the resistance.
Standard resistance:





(c) Reconnect the compressor and pulley connector.
NG -- REPLACE COMPRESSOR AND PULLEY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (COMPRESSOR AND PULLEY - AIR CONDITIONING AMPLIFIER)




(a) Disconnect the C8 compressor and pulley connector.
(b) Disconnect the E8 air conditioning amplifier connector.
(c) Measure the resistance.
Standard resistance:





(d) Reconnect the compressor and pulley connector.
(e) Reconnect the air conditioning amplifier connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (COMPRESSOR AND PULLEY - BODY GROUND)
(a) Disconnect the C8 compressor and pulley connector.




(b) Measure the resistance.
Standard resistance:





(c) Reconnect the compressor and pulley connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING AMPLIFIER