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

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DTC Code DTC Name
  Pattern Select Switch 2nd Start Mode Circuit
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DESCRIPTION

When 2nd mode is selected with the pattern select (2ND) switch, the ECM controls the solenoid valves and the transmission starts from 2nd gear.

The 2nd mode is the system that operates the throttle motor to control engine output to reduce skidding of the driving wheels, and guarantee takeoff acceleration, driving straightness and turning stability.

When the shift lever is in D, the transmission automatically shifts up through 3rd to 6th as usual.

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WIRING DIAGRAM

Refer to Pattern Select Switch Power Mode Circuit (Click here).

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INSPECTION PROCEDURE

When the pattern select (2ND) switch is pushed, switch contact is made and 2nd mode is selected. To cancel 2nd mode, push the pattern select (2ND) switch once again.

Tip:

2nd mode is automatically canceled when the engine switch is turned off.

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PROCEDURE


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    DRIVING TEST

    Tip:

    The driving test should be performed on a paved road (nonskid road).


    1. Start the engine.

    2. Turn the 2ND switch off (normal drive mode).

    3. Confirm vehicle response by driving from a parked position to fully depressing the accelerator pedal.

    4. Turn the 2ND switch on and perform the same check as above.

      When driving the vehicle with the 2ND switch on and off, check that there is a difference in acceleration.

      OK
      There is a difference in acceleration.

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    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

  3. Click here

    INSPECT PATTERN SELECT (2ND) SWITCH


    1. A0156TNE07

      Remove the suspension control switch (Click here).

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

      Standard Resistance
      Table 1. w/ CRAWL
      Tester Connection Switch Condition Specified Condition
      4 (2ND) - 16 (E) Pattern select (2nd) switch continuously pressed Below 1 Ω
      4 (2ND) - 16 (E) Pattern select (2nd) switch released 10 kΩ or higher
      Table 2. w/o CRAWL
      Tester Connection Switch Condition Specified Condition
      17 (2ND) - 20 (E) Pattern select (2nd) switch continuously pressed Below 1 Ω
      17 (2ND) - 20 (E) Pattern select (2nd) switch released 10 kΩ or higher
      Table 3. Text in Illustration
      A w/ CRAWL
      B w/o CRAWL
      *a

      Component without harness connected

      (Suspension Control Switch)

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    CHECK HARNESS AND CONNECTOR (PATTERN SELECT (2ND) SWITCH - BODY GROUND)


    1. A0159U1E05

      Disconnect the suspension control switch connector.

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

      Standard Resistance
      Table 4. w/ CRAWL
      Tester Connection Condition Specified Condition
      V4-16 (E) - Body ground Always Below 1 Ω
      Table 5. w/o CRAWL
      Tester Connection Condition Specified Condition
      V4-20 (E) - Body ground Always Below 1 Ω
      Table 6. Text in Illustration
      A w/ CRAWL
      B w/o CRAWL
      *a

      Front view of wire harness connector

      (to Suspension Control Switch)

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    CHECK HARNESS AND CONNECTOR (PATTERN SELECT (2ND) SWITCH - ECM)


    1. Disconnect the ECM connector.

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

      Standard Resistance
      Table 7. for LHD
      Tester Connection Switch Condition Specified Condition
      A38-4 (SNWI) - Body ground Pattern select (2ND) switch continuously pressed Below 1 Ω
      A38-4 (SNWI) - Body ground Pattern select (2ND) switch released 10 kΩ or higher
      Table 8. for RHD
      Tester Connection Switch Condition Specified Condition
      A52-4 (SNWI) - Body ground Pattern select (2ND) switch continuously pressed Below 1 Ω
      A52-4 (SNWI) - Body ground Pattern select (2ND) switch released 10 kΩ or higher
      Table 9. Text in Illustration
      *1 for LHD
      *2 for RHD
      *a

      Front view of wire harness connector

      (to ECM)

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    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

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    REPLACE PATTERN SELECT (2ND) SWITCH (SUSPENSION CONTROL SWITCH)Click here

  8. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPAIR OR REPLACE HARNESS OR CONNECTOR