AIR CONDITIONING SYSTEM ECO Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

PROCEDURE

1. READ VALUE USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Air Conditioner / Data List.

   5. According to the display on the GTS, perform the Data List.

      Air Conditioner

      Tester Display	Measurement Item/Range	Control Range	Diagnostic Note
      ECO Switch	ECO mode switch / OFF or ON	ECO mode switch not operated: OFF (when switch is not pressed)	-
      		ECO mode switch operated: ON (when switch is pressed)

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

   
   

   OK

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

   NG

2. INSPECT ECO SWITCH ASSEMBLY (ECO MODE SWITCH)

   
   

   1. Inspect the ECO switch assembly (ECO mode switch) Click here.

   
   

   NG

   REPLACE ECO MODE SWITCH (ECO SWITCH ASSEMBLY) Click here

   OK

3. CHECK HARNESS AND CONNECTOR (ECO SWITCH ASSEMBLY (ECO MODE SWITCH) - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BODY GROUND)

   
   

   1. Disconnect the F79 ECO switch assembly (ECO mode switch) connector.

   2. Disconnect the F29 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition F79-9 (ECU) - F29-4 (ECOS) Always Below 1 Ω F79-6 (E) - Body ground Always Below 1 Ω F79-9 (ECU) - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR