AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) IG Power Source Circuit

DESCRIPTION

This is the main power source supplied to the air conditioning amplifier when the ignition switch is on (IG). This power source is used for operating components, such as the air conditioning amplifier and servo motors.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   INSPECT FUSE (A/C NO. 2)

   
   

   1. Remove the A/C NO. 2 fuse from the instrument panel junction block.

   2. Measure the resistance of the fuse.

      Standard resistance
      Tester Connection Condition Specified Condition A/C NO. 2 fuse Always Below 1 Ω

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)

   
   
   1. 

      Disconnect the D33 amplifier connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition D33-1 (IG+) - Body ground Ignition switch on (IG) 11 to 14 V

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND)

   
   
   1. 

      Disconnect the D33 and D34 amplifier connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition D33-14 (GND) - Body ground Always Below 1 Ω D34-20 (GND2)* - Body ground Always Below 1 Ω

      Tip:

      *: w/ Rear Air Conditioning

   
   
   • OKClick here
   • NGClick here
4. Click here

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

5. Click here

   REPLACE FUSE

6. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR