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

DESCRIPTION

When SNOW mode 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.

WIRING DIAGRAM

B0077YOE27

PROCEDURE


  1. READ VALUE USING GTS (SNOW MODE SW)


    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 / Snow Mode SW.


      Powertrain > Engine > Data List
      Tester Display
      Snow Mode SW

    4. Read the value displayed on the GTS.

      OK
      Condition GTS Display (Snow Mode SW)
      SNOW mode switch pushed and held ON
      SNOW mode switch not pushed OFF
      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  2. INSPECT COMBINATION SWITCH ASSEMBLY (SNOW MODE SWITCH)


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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - ECM)


    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
      O78-3 (SNSW) - F66-105 (SNWI) Always Below 1 Ω
      O78-3 (SNSW) or F66-105 (SNWI) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. 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 ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR