AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System), Diagnostic DTC:B1451/51

DESCRIPTION

• for 2GR-FE

  In this circuit, the cooler compressor assembly (compressor solenoid) receives a refrigerant compression demand signal from the air conditioning amplifier assembly.

  Based on this signal, the cooler compressor assembly (compressor solenoid) changes the amount of compressor output.

• for 1AR-FE

  In this circuit, the compressor assembly with pulley (compressor solenoid) receives a refrigerant compression demand signal from the air conditioning amplifier assembly.

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

• *1: for 2GR-FE

• *2: for 1AR-FE

WIRING DIAGRAM

PROCEDURE

1. CONFIRM MODEL

   
   

   1. Choose the model to be inspected.

      Result
      Result Proceed to for 2GR-FE A for 1AR-FE B

   
   

   B

   INSPECT COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) Click here

   A

2. INSPECT COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID)

   
   
   1. 

      *a	Component without harness connected (Cooler Compressor Assembly (Compressor Solenoid))

      Disconnect the C16 cooler compressor assembly (compressor solenoid) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition C16-1 (SOL-) - C16-2 (SOL+) 25°C (77°F) 10.1 to 11.1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) Click here

   OK

3. CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) - BODY GROUND)

   
   

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

      Standard Resistance
      Tester Connection Condition Specified Condition C16-1 (SOL-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

   
   

   1. Disconnect the F80 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition C16-2 (SOL+) - F80-2 (SOL+) Always Below 1 Ω C16-2 (SOL+) - Body ground Always 10 kΩ or higher

      Result
      Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C

   
   

   A

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   B

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

   C

   REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

5. INSPECT COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)

   
   
   1. 

      *a	Component without harness connected (Compressor Assembly with Pulley (Compressor Solenoid))

      Disconnect the C16 compressor assembly with pulley (compressor solenoid) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition C16-1 (SOL-) - C16-2 (SOL+) 25°C (77°F) 10.1 to 11.1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) Click here

   OK

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

   
   

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

      Standard Resistance
      Tester Connection Condition Specified Condition C16-1 (SOL-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

   
   

   1. Disconnect the F80 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition C16-2 (SOL+) - F80-2 (SOL+) Always Below 1 Ω C16-2 (SOL+) - Body ground Always 10 kΩ or higher

      Result
      Result Proceed to NG A OK (When troubleshooting according to Problem Symptoms Table) B OK (When troubleshooting according to the DTC) C

   
   

   A

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   B

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

   C

   REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here