AIR CONDITIONING SYSTEM, Diagnostic DTC:B1451/51

DESCRIPTION

In this circuit, the A/C compressor receives a refrigerant compression demand signal from the A/C amplifier.

Based on this signal, the A/C compressor changes the amount of compressor output.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT A/C COMPRESSOR

   
   

   1. 

      Remove the A/C compressor.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E63-2 (SOL+) - E63-1 (SOL-) 20°C (68°F) 10 to 11 Ω

   
   

   NG

   REPLACE A/C COMPRESSOR Click here

   OK

2. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - BODY GROUND)

   
   

   1. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition E63-1 (SOL-) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - A/C AMPLIFIER)

   
   

   1. 

      Disconnect the A/C amplifier connector.

   2. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition J58-5 (SOL+) - E63-2 (SOL+) Always Below 1 Ω J58-5 (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

   
   

   B

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   C

   REPLACE A/C AMPLIFIER Click here

   A

   REPAIR OR REPLACE HARNESS OR CONNECTOR