AIR CONDITIONING SYSTEM, Diagnostic DTC:B1451/51

DESCRIPTION

• In this circuit, the compressor with pulley assembly*1 or cooler compressor assembly*2 receives a refrigerant compression demand signal from the air conditioning amplifier assembly.

  Based on this signal, the compressor with pulley assembly*1 or cooler compressor assembly*2 changes the amount of compressor output.

  
  

  • *1: for 2AR-FE

  • *2: for 2GR-FE

WIRING DIAGRAM

1. for 2AR-FE:

   

   *a	Compressor with Pulley Assembly
   *b	Air Conditioning Amplifier Assembly

2. for 2GR-FE:

   

   *a	Cooler Compressor Assembly
   *b	Air Conditioning Amplifier Assembly

CAUTION / NOTICE / HINT

PROCEDURE

1. READ VALUE USING GTS (REGULATOR CONTROL CURRENT)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Air Conditioner / Data List.

   5. Check the value(s) by referring to the table below.

      
      Body Electrical > Air Conditioner > Data List

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      Regulator Control Current	Solenoid valve control current	Min.: 0 A Max.: 0.997 A	Value changes between 0 A and 0.997 A in accordance with solenoid valve operation	-

      
      Body Electrical > Air Conditioner > Data List

      Tester Display
      Regulator Control Current

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

      Result
      Result Proceed to OK (When troubleshooting according to the DTC) A OK (When troubleshooting according to Problem Symptoms Table) B NG (for 2AR-FE) C NG (for 2GR-FE) D

   
   

   A

   REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY for LHD: Click here for RHD: Click here

   B

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   D

   INSPECT COOLER COMPRESSOR ASSEMBLY Click here

   C

2. INSPECT COMPRESSOR WITH PULLEY ASSEMBLY

   
   

   1. Remove the compressor with pulley assembly.

      Click here

   2. Inspect the compressor with pulley assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE COMPRESSOR WITH PULLEY ASSEMBLY Click here

   OK

3. CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH PULLEY ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BODY GROUND)

   
   

   1. Disconnect the G36 air conditioning amplifier assembly connector.

   2. Disconnect the D20 compressor with pulley assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition G36-2 (SOL+) - D69-2 (SOL+) Always Below 1 Ω D69-1 (SOL-) - Body ground Always Below 1 Ω G36-2 (SOL+) or D69-2 (SOL+) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY for LHD: Click here for RHD: Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

4. INSPECT COOLER COMPRESSOR ASSEMBLY

   
   

   1. Remove the cooler compressor assembly.

      Click here

   2. Inspect the cooler compressor assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE COOLER COMPRESSOR ASSEMBLY Click here

   OK

5. CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BODY GROUND)

   
   

   1. Disconnect the G36 air conditioning amplifier assembly connector.

   2. Disconnect the D69 cooler compressor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition G36-2 (SOL+) - D69-2 (SOL+) Always Below 1 Ω D69-1 (SOL-) - Body ground Always Below 1 Ω G36-2 (SOL+) or D69-2 (SOL+) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY for LHD: Click here for RHD: Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR