SFI SYSTEM 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.

WIRING DIAGRAM

A01FFQCE01

INSPECTION PROCEDURE

PROCEDURE


  1. 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 and ECT / Data List / Snow Switch Status.

    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

    NG

    INSPECT COMBINATION SWITCH ASSEMBLY Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

  2. INSPECT COMBINATION SWITCH ASSEMBLY


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


    NG

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    OK

  3. 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
      A21-22 (SNWI) - N59-2 (2ND) Always Below 1 Ω
      A21-22 (SNWI) or N59-2 (2ND) - Body ground Always 10 kΩ or higher

    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
      N59-4 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here