AUTOMATIC TRANSMISSION SYSTEM(for 1GR-FE) Pattern Select Switch 2nd Start Mode Circuit

DESCRIPTION

When 2nd start mode is selected with the combination switch assembly (2nd start), the ECM controls the solenoid valves and the transmission starts from 2nd gear.

In 2nd start mode, the system operates the throttle motor to control engine output to reduce skidding of the drive wheels and guarantee stable acceleration from rest, straight driving and turning stability.

When the shift lever is in D, the transmission automatically shifts up from 2nd to 6th as usual.

Tech Tips


  • The combination switch assembly (2nd start) is a momentary-type switch.

  • In order to cancel 2nd start mode, push the combination switch assembly (2nd start) again or turn the engine switch off.

WIRING DIAGRAM

B001D14E36
*1 SNWI
*2 Combination Switch Assembly (2nd Start)

PROCEDURE


  1. INSPECT COMBINATION SWITCH ASSEMBLY (2ND START)


    1. B001ICJE29
      Text in Illustration
      *1 Combination Switch Assembly (2nd Start)

      Remove the combination switch assembly (2nd start) Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      14 (2ND) - 24 (E) 2ND START switch pushed and held Below 1 Ω
      14 (2ND) - 24 (E) 2ND START switch not pushed 10 kΩ or higher
      Result:
      Result Proceed to
      OK A
      NG (w/ Module Switch) B
      NG (w/o Module Switch) C

    B

    REPLACE COMBINATION SWITCH ASSEMBLY (w/ Module Switch (2nd Start)) Click here

    C

    REPLACE NO. 2 COMBINATION SWITCH ASSEMBLY (w/o Module Switch (2nd Start)) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY (2ND START) - BODY GROUND)


    1. B001C84E07
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Combination Switch Assembly (2nd Start))

      Disconnect the combination switch assembly (2nd start) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G156-24 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY (2ND START) - ECM)


    1. B001EV4E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G55-19 (SNWI) - Body ground 2ND START switch switch pushed and held Below 1 Ω
      G55-19 (SNWI) - Body ground 2ND START switch switch not pushed 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR