AUTOMATIC TRANSMISSION SYSTEM(for V35A-FTS) FAIL-SAFE CHART


  1. Description

    The fail-safe function minimizes the loss of operation when a malfunction occurs in a sensor or solenoid.

  2. Fail-safe


    1. Fail-safe Control List:

      Malfunctioning Part Function
      Transmission revolution sensor (NT)

      • Lock up clutch control is prohibited.

      • AI-SHIFT* control is prohibited.

      • High response gear shifts are prohibited.
      Transmission revolution sensor (SP2)

      • Lock up clutch control is prohibited.

      • AI-SHIFT* control is prohibited.

      • High response gear shifts are prohibited.
      Solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SC1, SC2, SC3 and SR) valves If the ECM detects a solenoid valve malfunction, it performs fail-safe control.
      Transmission wire (ATF temperature sensor)

      • Lock up clutch control is prohibited.

      • High response gear shifts are prohibited.
      Knock sensor

      • When driving in 1st to 5th gear, up-shift to 6th or higher is prohibited.

      • When driving in 6th gear or higher, from the time the malfunction is detected, up-shift to higher gear is prohibited.

      • Lock up clutch control is prohibited.

      • High response gear shifts are prohibited.
      CAN communication

      • When driving in 1st to 3rd gear, the transmission will be fixed in 3rd gear.

      • When driving in 4th gear or higher, from the time the malfunction is detected, up-shift to higher gear is prohibited.

      • Lock up clutch control is prohibited.

      • High response gear shifts are prohibited.
      Solenoid (SLU and SL) valves

      • Lock up clutch control is prohibited.

      • Shifting to 7th to 10th is prohibited (ON malfunction).
      Solenoid (SLT) valve

      • Engine output is limited.

      • High response gear shifts are prohibited.

      Tech Tips

      *: In addition to the switching of the shift pattern through the satellite switch set, Artificial Intelligence Shift (AI-SHIFT) control enables the ECM to estimate the road conditions and driver intention in order to automatically select the optimal shift pattern.

    2. Shift Solenoid Valve Normal Operation Chart:

      Gear Solenoid (SL1) Valve Solenoid (SL2) Valve Solenoid (SL3) Valve Solenoid (SL4) Valve Solenoid (SL5) Valve Solenoid (SL6) Valve
      1st ON ON OFF OFF OFF ON
      2nd ON OFF OFF OFF ON ON
      3rd OFF ON OFF OFF ON ON
      4th OFF OFF OFF ON ON ON
      5th OFF ON OFF ON ON OFF
      6th ON OFF OFF ON ON OFF
      7th ON OFF ON ON OFF OFF
      8th OFF OFF ON ON ON OFF
      9th ON OFF ON OFF ON OFF
      10th OFF ON ON OFF ON OFF

    3. Fail-safe Control Chart:

      B006ABFE01

      Tech Tips


      • *1: Dependent on gear when malfunction detected.

      • *2: Dependent on torque when malfunction detected.

      • *3: Operation of fail-safe is canceled the first time the vehicle stops.

      • *4: Operation of fail-safe is not canceled for subsequent vehicle stops.

      • *5: Operation of fail-safe is canceled when a new trip is started.

      • *6: Operation of fail-safe is not canceled, as a vehicle stop was detected on the previous trip.

      • Fail-safe operation is performed when the ECM detects a malfunction.

      Solenoid (SL1) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st 1st 6th Neutral 4th
      2nd 2nd 6th Neutral 4th
      3rd Neutral 6th 3rd 4th
      4th 2nd, 4th or 6th 6th 4th 4th
      5th 6th or 7th 6th 5th 5th
      6th 6th 6th Neutral 8th
      7th 7th 7th Neutral 8th
      8th 7th 7th 8th 8th
      9th 9th 7th Neutral 8th
      10th 7th or 9th 7th 10th 8th
      Solenoid (SL2) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st 1st 1st Neutral 4th
      2nd Neutral 1st 2nd 4th
      3rd 3rd 3rd Neutral 4th
      4th 3rd or 4th 5th 4th 4th
      5th 5th 5th Neutral 6th
      6th 6th or 7th 7th 6th 6th
      7th 7th 7th 7th 7th
      8th 7th 7th 8th 8th
      9th 7th or 9th 7th 9th 9th
      10th 10th 10th Neutral 9th
      Solenoid (SL3) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st 7th 7th 1st 1st
      2nd 9th 7th 2nd 2nd
      3rd 10th 7th 3rd 3rd
      4th 8th 7th 4th 4th
      5th 7th 7th 5th 5th
      6th 7th 7th 6th 6th
      7th 7th 7th Neutral 6th
      8th 8th 7th Neutral 6th
      9th 9th 7th Neutral 6th
      10th 10th 7th Neutral 6th
      Solenoid (SL4) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st Neutral 4th 1st 1st
      2nd Neutral 4th 2nd 2nd
      3rd 4th 4th 3rd 3rd
      4th 4th 4th Neutral 9th
      5th 5th 5th Neutral 9th
      6th 6th 6th Neutral 9th
      7th 7th 7th Neutral 9th
      8th 8th 8th Neutral 9th
      9th 7th 8th 9th 9th
      10th 7th 8th 10th 10th
      Solenoid (SL5) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st Neutral 2nd or 3rd 1st 1st
      2nd 2nd 2nd or 3rd Neutral

      1st←→7th

      (Switching according to the vehicle speed)
      3rd 3rd 3rd Neutral 7th
      4th 4th 4th 4th 7th
      5th 5th 5th Neutral 7th
      6th 6th 6th Neutral 7th
      7th 7th or 9th 8th 7th 7th
      8th 8th 8th Neutral 7th
      9th 9th 9th Neutral 7th
      10th 10th 10th Neutral 7th
      Solenoid (SL6) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st 1st 1st 1st or Neutral 5th
      2nd 2nd 2nd 2nd or Neutral 5th
      3rd 3rd 3rd 3rd or Neutral 5th
      4th 4th 4th Neutral 5th
      5th 4th 4th 5th 5th
      6th 2th, 4th or 6th 4th 6th 6th
      7th 7th 7th 7th 7th
      8th 8th 8th 8th 8th
      9th 9th 9th 9th 9th
      10th 10th 10th 10th 10th
      Solenoid (SC1) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st 1st 1st 1st or Neutral 3rd
      2nd 2nd 2nd 2nd or Neutral 3rd
      3rd 3rd 3rd 3rd 3rd
      4th 4th 4th 4th 4th
      5th 4th or 5th 4th 5th 5th
      6th Neutral 8th 6th 6th
      7th Neutral 8th 7th 7th
      8th 8th 8th 8th 8th
      9th 9th 9th 9th 9th
      10th 10th 10th 10th 10th
      Solenoid (SC2) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction*

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st Neutral 5th 1st 1st
      2nd Neutral 5th 2nd 2nd
      3rd Neutral 5th 3rd 3rd
      4th Neutral 5th 4th 4th
      5th Neutral 5th 5th 5th
      6th Neutral 6th 6th 6th
      7th Neutral 7th 7th 7th
      8th Neutral 8th 8th 8th
      9th Neutral 9th 9th 9th
      10th Neutral 10th 10th 10th

      *: Changes to neutral condition when shift state is in reverse (R).

      Solenoid (SC3) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction*

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st Neutral 5th 1st 1st
      2nd Neutral 5th 2nd 2nd
      3rd Neutral 5th 3rd 3rd
      4th Neutral 5th 4th 4th
      5th Neutral 5th 5th 5th
      6th Neutral 6th 6th 6th
      7th Neutral 7th 7th 7th
      8th Neutral 8th 8th 8th
      9th Neutral 9th 9th 9th
      10th Neutral 10th 10th 10th

      *: Changes to neutral condition when shift state is in reverse (R).

      Solenoid (SL) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st 1st 1st 1st 1st
      2nd 2nd 2nd 2nd 2nd
      3rd 3rd 3rd 3rd 3rd
      4th 4th 4th 4th 4th
      5th 5th 5th 5th 5th
      6th 6th 6th 6th 6th
      7th 7th or Neutral 7th 7th 7th
      8th 8th or Neutral 8th 8th 8th
      9th 9th or Neutral 9th 9th 9th
      10th 10th or Neutral 10th 10th 10th
      Solenoid (SR) Valve:
      Gear Under Normal Conditions

      ON malfunction*

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st 1st 1st 1st 1st
      2nd 2nd 2nd 2nd 2nd
      3rd 3rd 3rd 3rd 3rd
      4th 4th 4th 4th 4th
      5th 5th 5th 5th 5th
      6th 6th 6th 6th 6th
      7th 7th 7th 7th 7th
      8th 8th 8th 8th 8th
      9th 9th 9th 9th 9th
      10th 10th 10th 10th 10th

      *: Changes to neutral condition when shift state is in reverse (R).

      Solenoid (SLT) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st 1st 1st 1st or Neutral 1st
      2nd 2nd 2nd 2nd or Neutral 2nd
      3rd 3rd 3rd 3rd or Neutral 3rd
      4th 4th 4th 4th or Neutral 4th
      5th 5th 5th 5th or Neutral 5th
      6th 6th 6th 6th or Neutral 6th
      7th 7th 7th 7th or Neutral 7th
      8th 8th 8th 8th or Neutral 8th
      9th 9th 9th 9th or Neutral 9th
      10th 10th 10th 10th or Neutral 10th
      Solenoid (SLU) Valve:
      Gear Under Normal Conditions

      ON malfunction

      (without fail-safe control)

      		 Fail-safe control during ON malfunction

      OFF malfunction

      (without fail-safe control)

      		 Fail-safe control during OFF malfunction
      1st 1st 1st 1st 1st
      2nd 2nd 2nd 2nd 2nd
      3rd 3rd 3rd 3rd 3rd
      4th 4th 4th 4th 4th
      5th 5th 5th 5th 5th
      6th 6th 6th 6th 6th
      7th 7th or Neutral 6th 7th 7th
      8th 8th or Neutral 6th 8th 8th
      9th 9th or Neutral 6th 9th 9th
      10th 10th or Neutral 6th 10th 10th