Automatic Transmission System (For 1Vd-Ftv) Fail-Safe Chart

Drivetrain. Land Cruiser. Urj200, 202 Grj200 Vdj200
Ab60F Automatic Transmission Transaxle. Land Cruiser. Urj200, 202 Grj200 Vdj200

  1. Fail-safe

  1. Fail-safe Control List

Automatic Transmission System (For 1Vd-Ftv) -- Fail-Safe Chart



Fail-safe
This function minimizes the loss of the ECT functions when a malfunction occurs in each sensor or solenoid.

Fail-safe Control List

Malfunctioning Part
Function
DTC P0717:
Input Speed Sensor NT
During an input speed sensor malfunction, shift control is performed through the output speed sensor SP2 signal.
During an input speed sensor malfunction, up-shift to 5th and 6th, AI-SHIFT* and flex lock-up clutch control are prohibited.
DTC P0722:
Output Speed Sensor SP2
During an output speed sensor malfunction, shift control is performed through the input speed sensor NT signal.
During an output speed sensor malfunction, up-shift to 5th and 6th, AI-SHIFT* and flex lock-up clutch control are prohibited.
DTC P0712, P0713:
ATF Temperature Sensor
During an ATF temperature sensor malfunction, up-shift to 5th and 6th and flex lock-up clutch control are prohibited.
Shift Solenoid Valve S1, S2, S3, S4 and SR
The current to the malfunctioning solenoid valve is cut off and control is performed by operating the other solenoid valves.
Shift control is performed depending on the malfunctioning solenoid as described in the table below.
DTC P0748, P0778:
Shift Solenoid Valve SL1 and SL2
During a solenoid valve SL1 or SL2 malfunction, up-shift to 5th and 6th and flex lock-up clutch control are prohibited.
DTC P2714, P2716:
Shift Solenoid Valve SLT
During a solenoid valve SLT malfunction, the current to the solenoid valve is stopped. This stops line pressure optimal control, and shift shock increases. However, shifting is performed through normal clutch pressure control.
DTC P2757, P2759:
Shift Solenoid Valve SLU
During a solenoid valve SLU malfunction, the current to the solenoid valve is stopped. This stops lock-up control and flex lock-up control, and fuel economy decreases.
HINT:
*: In addition to the switching of the shift pattern through the pattern select switch, Artificial Intelligence Shift (AI-SHIFT) control enables the ECM to estimate the road conditions and the driver intention in order to automatically select the optimal shift pattern.

Shift Solenoid Valve Normal Operation Chart
Shift Lever Position
Gear*
Shift Solenoid valve S1
Shift Solenoid valve S2
Shift Solenoid valve S3
Shift Solenoid valve S4
Shift Solenoid valve SR
Shift Solenoid valve SL1
Shift Solenoid valve SL2
D, S6
1st
OFF
ON
ON
OFF
ON
OFF
ON
2nd
ON
ON
ON
OFF
ON
OFF
ON
3rd
ON
OFF
ON
OFF
ON
OFF
ON
4th
ON
OFF
OFF
OFF
ON
OFF
ON
5th
ON
OFF
OFF
ON
OFF
ON
OFF
6th
ON
ON
OFF
ON
OFF
ON
OFF
S5
1st
OFF
ON
ON
OFF
ON
OFF
ON
2nd
ON
ON
ON
OFF
ON
OFF
ON
3rd
ON
OFF
ON
OFF
ON
OFF
ON
4th
ON
OFF
OFF
OFF
ON
OFF
ON
5th
ON
OFF
OFF
ON
OFF
ON
OFF
S4
1st
OFF
ON
ON
OFF
ON
OFF
ON
2nd
ON
ON
ON
OFF
ON
OFF
ON
3rd
ON
OFF
ON
OFF
ON
OFF
ON
4th
ON
OFF
OFF
OFF
ON
OFF
ON
S3
1st
OFF
ON
ON
OFF
ON
OFF
ON
2nd
ON
ON
ON
OFF
ON
OFF
ON
3rd (E/B)
ON
OFF
ON
OFF
ON
OFF
OFF
S2
1st
OFF
ON
ON
OFF
ON
OFF
ON
2nd (E/B)
ON
ON
ON
ON
ON
OFF
OFF
S1
1st (E/B)
OFF
ON
ON
OFF
ON
OFF
OFF

  1. Fail-safe operation for electronically malfunctioning shift solenoid valve (S1, S2, S3, S4 and SR).

    1. Fail-safe function
      If any of the shift solenoid valve circuits has an open or short failure, the ECM turns the other shift solenoids "ON" and "OFF" in order to shift into the gear positions shown in the table below. Also, the ECM stops sending current to the open or short circuited solenoid.
      Even if starting the engine again in the fail-safe mode, the gear position remains in the same position.

      HINT:
      1. *: Actual gear shift (gear position) under fail-safe operation.
      2. X: OFF (the ECM stops sending current to the malfunctioning solenoid valve).
      3. Electrical malfunction: Condition is shown to the left of the "→".
      4. Fail-safe mode: Condition is shown to the right of the "→".
      5. E/B: Engine brake

      Shift Solenoid Valve S1 Electrical Malfunction (P0973, P0974)
      Shift Lever Position
      		Gear*
      		Shift Solenoid valve S1
      		Shift Solenoid valve S2
      		Shift Solenoid valve S3
      		Shift Solenoid valve S4
      		Shift Solenoid valve SR
      		Shift Solenoid valve SL1
      		Shift Solenoid valve SL2
      D, S6
      		1st
      		X
      		ON
      		ON
      		OFF
      		ON
      		OFF
      		ON
      1st → 4th
      		X
      		ON → OFF
      		ON → OFF
      		OFF
      		ON
      		OFF
      		ON
      3rd → 4th
      		X
      		OFF
      		ON → OFF
      		OFF
      		ON
      		OFF
      		ON
      4th
      		X
      		OFF
      		OFF
      		OFF
      		ON
      		OFF
      		ON
      5th
      		X
      		OFF
      		OFF
      		ON
      		OFF
      		ON
      		OFF
      N → 5th
      		X
      		ON → OFF
      		OFF
      		ON
      		OFF
      		ON
      		OFF
      S5
      		1st
      		X
      		ON
      		ON
      		OFF
      		ON
      		OFF
      		ON
      1st → 4th
      		X
      		ON → OFF
      		ON → OFF
      		OFF
      		ON
      		OFF
      		ON
      3rd → 4th
      		X
      		OFF
      		ON → OFF
      		OFF
      		ON
      		OFF
      		ON
      4th
      		X
      		OFF
      		OFF
      		OFF
      		ON
      		OFF
      		ON
      5th
      		X
      		OFF
      		OFF
      		ON
      		OFF
      		ON
      		OFF
      S4
      		1st
      		X
      		ON
      		ON
      		OFF
      		ON
      		OFF
      		ON
      1st → 4th
      		X
      		ON → OFF
      		ON → OFF
      		OFF
      		ON
      		OFF
      		ON
      3rd → 4th
      		X
      		OFF
      		ON → OFF
      		OFF
      		ON
      		OFF
      		ON
      4th
      		X
      		OFF
      		OFF
      		OFF
      		ON
      		OFF
      		ON
      S3
      		1st
      		X
      		ON
      		ON
      		OFF
      		ON
      		OFF
      		ON
      1st → 4th
      		X
      		ON → OFF
      		ON → OFF
      		OFF
      		ON
      		OFF
      		ON
      3rd (E/B) → 4th
      		X
      		OFF
      		ON → OFF
      		OFF
      		ON
      		OFF
      		OFF → ON
      S2
      		1st
      		X
      		ON
      		ON
      		OFF
      		ON
      		OFF
      		ON
      2nd (E/B) → 4th
      		X
      		ON → OFF
      		ON → OFF
      		ON → OFF
      		ON
      		OFF
      		OFF → ON
      S1
      		1st (E/B)
      		X
      		ON
      		ON
      		OFF
      		ON
      		OFF
      		OFF

      Shift Solenoid Valve S2 Electrical Malfunction (P0976, P0977)
      Shift Lever Position
      		Gear*
      		Shift Solenoid valve S1
      		Shift Solenoid valve S2
      		Shift Solenoid valve S3
      		Shift Solenoid valve S4
      		Shift Solenoid valve SR
      		Shift Solenoid valve SL1
      		Shift Solenoid valve SL2
      D, S6
      		3rd
      		OFF → ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON
      3rd
      		ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON
      3rd
      		ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		X
      		OFF
      		OFF
      		ON
      		OFF
      		ON
      5th
      		ON
      		X
      		OFF
      		ON
      		OFF
      		ON
      		OFF
      5th
      		ON
      		X
      		OFF
      		ON
      		OFF
      		ON
      		OFF
      S5
      		3rd
      		OFF → ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON
      3rd
      		ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON
      3rd
      		ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		X
      		OFF
      		OFF
      		ON
      		OFF
      		ON
      5th
      		ON
      		X
      		OFF
      		ON
      		OFF
      		ON
      		OFF
      S4
      		3rd
      		OFF → ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON
      3rd
      		ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON
      3rd
      		ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		X
      		OFF
      		OFF
      		ON
      		OFF
      		ON
      S3
      		3rd → 3rd (E/B)
      		OFF → ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON → OFF
      3rd → 3rd (E/B)
      		ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		ON → OFF
      3rd (E/B)
      		ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		OFF
      S2
      		3rd → 3rd (E/B)
      		OFF → ON
      		X
      		ON
      		OFF
      		ON
      		ON → OFF
      		ON → OFF
      3rd (E/B)
      		ON
      		X
      		ON
      		ON → OFF
      		ON
      		OFF
      		OFF
      S1
      		3rd (E/B)
      		OFF → ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      		OFF

      Shift Solenoid Valve S3 Electrical Malfunction (P0979, P0980)
      Shift Lever Position
      		Gear*
      		Shift Solenoid valve S1
      		Shift Solenoid valve S2
      		Shift Solenoid valve S3
      		Shift Solenoid valve S4
      		Shift Solenoid valve SR
      		Shift Solenoid valve SL1
      		Shift Solenoid valve SL2
      D, S6
      		3rd → 4th
      		OFF
      		ON
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		ON → OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      5th
      		ON
      		OFF
      		X
      		ON
      		OFF
      		ON
      		OFF
      6th
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      		OFF
      S5
      		3rd
      		OFF
      		ON
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		ON → OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      5th
      		ON
      		OFF
      		X
      		ON
      		OFF
      		ON
      		OFF
      S4
      		3rd
      		OFF
      		ON
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		ON → OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      S3
      		3rd
      		OFF
      		ON
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		ON → OFF
      		X
      		OFF
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		X
      		OFF
      		ON
      		OFF
      		OFF → ON
      S2
      		3rd
      		OFF
      		ON
      		X
      		OFF
      		ON
      		OFF
      		ON
      6th → 4th
      		ON
      		ON → OFF
      		X
      		ON → OFF
      		ON
      		OFF
      		OFF → ON
      S1
      		1st
      		OFF
      		ON
      		X
      		OFF
      		ON
      		OFF
      		OFF

      Shift Solenoid Valve S4 Electrical Malfunction (P0982, P0983)
      Shift Lever Position
      		Gear*
      		Shift Solenoid valve S1
      		Shift Solenoid valve S2
      		Shift Solenoid valve S3
      		Shift Solenoid valve S4
      		Shift Solenoid valve SR
      		Shift Solenoid valve SL1
      		Shift Solenoid valve SL2
      D, S6
      		1st
      		OFF
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      2nd
      		ON
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      3rd
      		ON
      		OFF
      		ON
      		X
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		OFF
      		X
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		OFF
      		X
      		OFF → ON
      		ON → OFF
      		OFF → ON
      4th
      		ON
      		ON → OFF
      		OFF
      		X
      		OFF → ON
      		ON → OFF
      		OFF → ON
      S5
      		1st
      		OFF
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      2nd
      		ON
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      3rd
      		ON
      		OFF
      		ON
      		X
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		OFF
      		X
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		OFF
      		X
      		OFF → ON
      		ON → OFF
      		OFF → ON
      S4
      		1st
      		OFF
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      2nd
      		ON
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      3rd
      		ON
      		OFF
      		ON
      		X
      		ON
      		OFF
      		ON
      4th
      		ON
      		OFF
      		OFF
      		X
      		ON
      		OFF
      		ON
      S3
      		1st
      		OFF
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      2nd
      		ON
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      3rd (E/B)
      		ON
      		OFF
      		ON
      		X
      		ON
      		OFF
      		OFF
      S2
      		1st
      		OFF
      		ON
      		ON
      		X
      		ON
      		OFF
      		ON
      2nd (E/B)
      		ON
      		ON
      		ON
      		X
      		ON
      		OFF
      		OFF
      S1
      		1st (E/B)
      		OFF
      		ON
      		ON
      		X
      		ON
      		OFF
      		OFF

      Shift Solenoid Valve SR Electrical Malfunction (P0985, P0986)
      Shift Lever Position
      		Gear*
      		Shift Solenoid valve S1
      		Shift Solenoid valve S2
      		Shift Solenoid valve S3
      		Shift Solenoid valve S4
      		Shift Solenoid valve SR
      		Shift Solenoid valve SL1
      		Shift Solenoid valve SL2
      D, S6
      		1st
      		OFF
      		ON
      		ON
      		OFF
      		X
      		OFF
      		ON
      2nd
      		ON
      		ON
      		ON
      		OFF
      		X
      		OFF
      		ON
      3rd
      		ON
      		OFF
      		ON
      		OFF
      		X
      		OFF
      		ON
      4th
      		ON
      		OFF
      		OFF
      		OFF
      		X
      		OFF
      		ON
      5th
      		ON
      		OFF
      		OFF
      		ON
      		X
      		ON
      		OFF
      6th
      		ON
      		ON
      		OFF
      		ON
      		X
      		ON
      		OFF
      S5
      		1st
      		OFF
      		ON
      		ON
      		OFF
      		X
      		OFF
      		ON
      2nd
      		ON
      		ON
      		ON
      		OFF
      		X
      		OFF
      		ON
      3rd
      		ON
      		OFF
      		ON
      		OFF
      		X
      		OFF
      		ON
      4th
      		ON
      		OFF
      		OFF
      		OFF
      		X
      		OFF
      		ON
      5th
      		ON
      		OFF
      		OFF
      		ON
      		X
      		ON
      		OFF
      S4
      		1st
      		OFF
      		ON
      		ON
      		OFF
      		X
      		OFF
      		ON
      2nd
      		ON
      		ON
      		ON
      		OFF
      		X
      		OFF
      		ON
      3rd
      		ON
      		OFF
      		ON
      		OFF
      		X
      		OFF
      		ON
      4th
      		ON
      		OFF
      		OFF
      		OFF
      		X
      		OFF
      		ON
      S3
      		1st
      		OFF
      		ON
      		ON
      		OFF
      		X
      		OFF
      		ON
      2nd
      		ON
      		ON
      		ON
      		OFF
      		X
      		OFF
      		ON
      3rd (E/B)
      		ON
      		OFF
      		ON
      		OFF
      		X
      		OFF
      		OFF
      S2
      		1st
      		OFF
      		ON
      		ON
      		OFF
      		X
      		OFF
      		ON
      2nd (E/B)
      		ON
      		ON
      		ON
      		ON
      		X
      		OFF
      		OFF
      S1
      		1st (E/B)
      		OFF
      		ON
      		ON
      		OFF
      		X
      		OFF
      		OFF

  2. Fail-safe operation in the event of a mechanical system malfunction.

    1. Fail-safe function
      The ECM controls the gear position as shown in the table below when malfunctions occur.

      DTC Code
      		Condition
      		Gear*1
      -
      		Normal
      		1st
      		2nd
      		3rd
      		4th
      		5th
      		6th
      P0751
      		Shift solenoid valve S1:
      Stuck OFF malfunction
      		1st*2
      		1st*2
      		3rd
      		3rd
      		3rd
      		3rd
      P0761
      		Shift solenoid valve S3:
      Stuck ON malfunction
      		1st
      		2nd
      		3rd
      		3rd
      		3rd
      		3rd
      P0766
      P0776
      		Shift solenoid valve S4, shift solenoid valve SL2 or valve body (brake control valve):
      Malfunction
      		1st
      		2nd
      		3rd
      		3rd
      		3rd
      		3rd
      P0781
      		Valve body (1-2 shift valve):
      Malfunction
      		1st*2
      		1st*2
      		3rd
      		3rd
      		3rd
      		3rd
      P0729
      		Valve body (sequence valve):
      Malfunction
      		1st
      		2nd
      		3rd
      		3rd
      		3rd
      		3rd

      HINT:
      1. *1: Actual gear shift (gear position) under fail-safe operation.
      2. *2: Under engine braking, downshifting to 1st or 2nd gear is prohibited.