SFI SYSTEM(w/o Canister Pump Module) Pattern Select Switch Snow Mode Circuit

DESCRIPTION

When SNOW is selected, the operation of the throttle motor is moderated to control engine output. This helps to reduce skidding of the drive wheels, and assists with takeoff acceleration, driving straightness and turning stability.

PROCEDURE

1. Click here

   READ VALUE USING GTS (SNOW SWITCH STATUS)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the engine switch on (IG) and turn the GTS on.

   3. Enter the following menus: Powertrain / Engine / Data List / All Data / Snow Switch Status.

      
      
      1. Powertrain > Engine > Data List

         Tester Display
         Snow Switch Status

      2. 
         
         1. 
            
      3. 
         
         10. 
             

   4. Read the value displayed on the GTS.

      OK
      Condition GTS Display (Snow Switch Status) SNOW mode switch pushed and held ON SNOW mode switch not pushed OFF

      Result
      Proceed to OK NG

   
   
   • OK

     CHECK FOR INTERMITTENT PROBLEMSClick here

   • NGClick here
2. Click here

   INSPECT COMBINATION SWITCH ASSEMBLY

   
   

   1. Inspect the combination switch assembly (SNOW mode switch).

      Click here

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE COMBINATION SWITCH ASSEMBLYClick here

3. Click here

   CHECK HARNESS AND CONNECTOR (ECM - COMBINATION SWITCH ASSEMBLY)

   
   

   1. Disconnect the combination switch assembly connector.

   2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A77-16 (SNWI) - O78-3 (SNSW) Always Below 1 Ω A77-16 (SNWI) or O78-3 (SNSW) - 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 - BODY GROUND)

   
   

   1. Disconnect the combination switch assembly connector.

   2. 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 ECMClick here

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR