AIR CONDITIONING SYSTEM ECO Switch Circuit

DESCRIPTION

When the combination switch assembly (ECO mode switch) is turned on, the air conditioning amplifier assembly receives a combination switch assembly (ECO mode switch) ON signal and controls the air conditioning to enhance fuel efficiency.

PROCEDURE

1. Click here

   READ VALUE USING GTS

   
   

   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. Read the Data List according to the display on the GTS.

      
      
      1. Body Electrical > Air Conditioner > Data List

         Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
         ECO Switch	Combination switch assembly (ECO mode switch)	OFF or ON	ON: Combination switch assembly (ECO mode switch) being turned and held at ECO position OFF: Combination switch assembly (ECO mode switch) not turned	-

      2. 
         
         10. 
             
      
      
      1. Body Electrical > Air Conditioner > Data List

         Tester Display
         ECO Switch

      2. 
         
         1. 
            
      3. 
         
         10. 
             

      OK
      Combination switch assembly (ECO mode switch) condition displayed on the GTS changes with the actual switch operation.

      Result
      Proceed to OK NG

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

   • NGClick here
2. Click here

   INSPECT COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH)

   
   

   1. Remove the combination switch assembly (ECO mode switch).

      Click here

   2. 

      *a	Component without harness connected (Combination Switch Assembly (ECO Mode Switch))

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

      Standard Resistance
      Tester Connection Condition Specified Condition 11 (ECO) - 16 (E) Combination switch assembly (ECO mode switch) not turned 10 kΩ or higher 11 (ECO) - 16 (E) Combination switch assembly (ECO mode switch) being turned and held at ECO position Below 50 Ω

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH)Click here

3. Click here

   CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

   
   

   1. Disconnect the O9 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 O9-29 (ECOS) - O78-11 (ECO) Always Below 1 Ω O9-29 (ECOS) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

4. Click here

   CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH) - BODY GROUND)

   
   

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

      Standard Resistance
      Tester Connection Condition Specified Condition O78-16 (E) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   
   • OK

     REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR