AIR CONDITIONING SYSTEM, Diagnostic DTC:B1451/51

DESCRIPTION

• w/o Stop and Start System

  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.

• w/ Stop and Start System

  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: w/o Stop and Start System

• *2: w/ Stop and Start System

WIRING DIAGRAM

PROCEDURE

1. CONFIRM MODEL

   
   

   1. Choose the model to be inspected.

      Result
      Result Proceed to w/o Stop and Start System A w/ Stop and Start System 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 D17 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 1 (SOL-) - 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 D17-1 (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 J43 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 D17-2 (SOL+) - J43-3 (SOL+) Always Below 1 Ω D17-2 (SOL+) or J43-3 (SOL+) - Body ground Always 10 kΩ or higher

      Result
      Result Proceed to NG A OK (When troubleshooting according to the 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 D17 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 1 (SOL-) - 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 D17-1 (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 J43 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 D17-2 (SOL+) - J43-3 (SOL+) Always Below 1 Ω D17-2 (SOL+) or J43-3 (SOL+) - Body ground Always 10 kΩ or higher

      Result
      Result Proceed to NG A OK (When troubleshooting according to the 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