Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - AB60F AUTOMATIC TRANSMISSION / TRANSAXLE


AUTOMATIC TRANSMISSION SYSTEM (for 3UR-FE) - FAIL-SAFE CHART

Fail-safe

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

Fail-safe control list
Malfunctioning PartFunction
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 using 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 SRThe current to the malfunctioning solenoid valve is cut off and control is performed by operating the other normal solenoid valves.
Shift control is performed depending on the failed 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 optimal line pressure control and shift shock increases. However, shifting is performed using normal clutch pressure control.
DTC 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's intention in order to automatically select the optimal shift pattern.
Shift Solenoid Valve Normal Operation Chart
Shift Lever PositionGear*Shift Solenoid S1Shift Solenoid S2Shift Solenoid S3Shift Solenoid S4Shift Solenoid SRShift Solenoid SL1Shift Solenoid SL2
D, S61stOFFONONOFFONOFFON
2ndONONONOFFONOFFON
3rdONOFFONOFFONOFFON
4thONOFFOFFOFFONOFFON
5thONOFFOFFONOFFONOFF
6thONONOFFONOFFONOFF
S51stOFFONONOFFONOFFON
2ndONONONOFFONOFFON
3rdONOFFONOFFONOFFON
4thONOFFOFFOFFONOFFON
5thONOFFOFFONOFFONOFF
S41stOFFONONOFFONOFFON
2ndONONONOFFONOFFON
3rdONOFFONOFFONOFFON
4thONOFFOFFOFFONOFFON
S31stOFFONONOFFONOFFON
2ndONONONOFFONOFFON
3rd (E/B)ONOFFONOFFONOFFOFF
S21stOFFONONOFFONOFFON
2nd (E/B)ONONONONONOFFOFF
S11st (E/B)OFFONONOFFONOFFOFF

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

Fail-safe function


If any of the shift solenoid valve circuits has an open or short failure, the ECM turns the other shift solenoid valves 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 fail-safe mode, the gear position remains in the same position.

  • HINT:
*: Actual gear shift (gear position) under fail-safe operation.
X: OFF (the ECM stops sending current to the malfunctioning solenoid valve).
Electrical malfunction: Condition is shown to the left of the "→".
Fail-safe mode: Condition is shown to the right of the "→".
E/B: Engine brake
Shift Solenoid Valve S1 Electrical Malfunction (P0973, P0974)
Shift Lever PositionGear*Shift Solenoid S1Shift Solenoid S2Shift Solenoid S3Shift Solenoid S4Shift Solenoid SRShift Solenoid SL1Shift Solenoid SL2
D, S61stXONONOFFONOFFON
1st → 4thXON → OFFON → OFFOFFONOFFON
3rd → 4thXOFFON → OFFOFFONOFFON
4thXOFFOFFOFFONOFFON
5thXOFFOFFONOFFONOFF
N → 5thXON → OFFOFFONOFFONOFF
S51stXONONOFFONOFFON
1st → 4thXON → OFFON → OFFOFFONOFFON
3rd → 4thXOFFON → OFFOFFONOFFON
4thXOFFOFFOFFONOFFON
5thXOFFOFFONOFFONOFF
S41stXONONOFFONOFFON
1st → 4thXON → OFFON → OFFOFFONOFFON
3rd → 4thXOFFON → OFFOFFONOFFON
4thXOFFOFFOFFONOFFON
S31stXONONOFFONOFFON
1st → 4thXON → OFFON → OFFOFFONOFFON
3rd (E/B) → 4thXOFFON → OFFOFFONOFFOFF → ON
S21stXONONOFFONOFFON
2nd (E/B) → 4thXON → OFFON → OFFON → OFFONOFFOFF → ON
S11st (E/B)XONONOFFONOFFOFF
Shift Solenoid Valve S2 Electrical Malfunction (P0976, P0977)
Shift Lever PositionGear*Shift Solenoid S1Shift Solenoid S2Shift Solenoid S3Shift Solenoid S4Shift Solenoid SRShift Solenoid SL1Shift Solenoid SL2
D, S63rdOFF → ONXONOFFONOFFON
3rdONXONOFFONOFFON
3rdONXONOFFONOFFON
4thONXOFFOFFONOFFON
5thONXOFFONOFFONOFF
5thONXOFFONOFFONOFF
S53rdOFF → ONXONOFFONOFFON
3rdONXONOFFONOFFON
3rdONXONOFFONOFFON
4thONXOFFOFFONOFFON
5thONXOFFONOFFONOFF
S43rdOFF → ONXONOFFONOFFON
3rdONXONOFFONOFFON
3rdONXONOFFONOFFON
4thONXOFFOFFONOFFON
S33rd → 3rd (E/B)OFF → ONXONOFFONOFFON → OFF
3rd → 3rd (E/B)ONXONOFFONOFFON → OFF
3rd (E/B)ONXONOFFONOFFOFF
S23rd → 3rd (E/B)OFF → ONXONOFFONON → OFFON → OFF
3rd (E/B)ONXONON → OFFONOFFOFF
S13rd (E/B)OFF → ONXONOFFONOFFOFF
Shift Solenoid Valve S3 Electrical Malfunction (P0979, P0980)
Shift Lever PositionGear*Shift Solenoid S1Shift Solenoid S2Shift Solenoid S3Shift Solenoid S4Shift Solenoid SRShift Solenoid SL1Shift Solenoid SL2
D, S63rd → 4thOFFONXOFFONOFFON
4thONON → OFFXOFFONOFFON
4thONOFFXOFFONOFFON
4thONOFFXOFFONOFFON
5thONOFFXONOFFONOFF
6thONONXONOFFONOFF
S53rdOFFONXOFFONOFFON
4thONON → OFFXOFFONOFFON
4thONOFFXOFFONOFFON
4thONOFFXOFFONOFFON
5thONOFFXONOFFONOFF
S43rdOFFONXOFFONOFFON
4thONON → OFFXOFFONOFFON
4thONOFFXOFFONOFFON
4thONOFFXOFFONOFFON
S33rdOFFONXOFFONOFFON
4thONON → OFFXOFFONOFFON
4thONOFFXOFFONOFFOFF → ON
S23rdOFFONXOFFONOFFON
6th → 4thONON → OFFXON → OFFONOFFOFF → ON
S11stOFFONXOFFONOFFOFF
Shift Solenoid Valve S4 Electrical Malfunction (P0982, P0983)
Shift Lever PositionGear*Shift Solenoid S1Shift Solenoid S2Shift Solenoid S3Shift Solenoid S4Shift Solenoid SRShift Solenoid SL1Shift Solenoid SL2
D, S61stOFFONONXONOFFON
2ndONONONXONOFFON
3rdONOFFONXONOFFON
4thONOFFOFFXONOFFON
4thONOFFOFFXOFF → ONON → OFFOFF → ON
4thONON → OFFOFFXOFF → ONON → OFFOFF → ON
S51stOFFONONXONOFFON
2ndONONONXONOFFON
3rdONOFFONXONOFFON
4thONOFFOFFXONOFFON
4thONOFFOFFXOFF → ONON → OFFOFF → ON
S41stOFFONONXONOFFON
2ndONONONXONOFFON
3rdONOFFONXONOFFON
4thONOFFOFFXONOFFON
S31stOFFONONXONOFFON
2ndONONONXONOFFON
3rd (E/B)ONOFFONXONOFFOFF
S21stOFFONONXONOFFON
2nd (E/B)ONONONXONOFFOFF
S11st (E/B)OFFONONXONOFFOFF
Shift Solenoid Valve SR Electrical Malfunction (P0985, P0986)
Shift Lever PositionGear*Shift Solenoid S1Shift Solenoid S2Shift Solenoid S3Shift Solenoid S4Shift Solenoid SRShift Solenoid SL1Shift Solenoid SL2
D, S61stOFFONONOFFXOFFON
2ndONONONOFFXOFFON
3rdONOFFONOFFXOFFON
4thONOFFOFFOFFXOFFON
5thONOFFOFFONXONOFF
6thONONOFFONXONOFF
S51stOFFONONOFFXOFFON
2ndONONONOFFXOFFON
3rdONOFFONOFFXOFFON
4thONOFFOFFOFFXOFFON
5thONOFFOFFONXONOFF
S41stOFFONONOFFXOFFON
2ndONONONOFFXOFFON
3rdONOFFONOFFXOFFON
4thONOFFOFFOFFXOFFON
S31stOFFONONOFFXOFFON
2ndONONONOFFXOFFON
3rd (E/B)ONOFFONOFFXOFFOFF
S21stOFFONONOFFXOFFON
2nd (E/B)ONONONONXOFFOFF
S11st (E/B)OFFONONOFFXOFFOFF

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

Fail-safe function


The ECM controls the gear position as shown in the table below when malfunctions occur.

DTCConditionGear*1
-Normal1st2nd3rd4th5th6th
P0751Shift solenoid valve S1:
Stuck OFF malfunction		1st*21st*23rd3rd3rd3rd
P0761Shift solenoid valve S3:
Stuck ON malfunction		1st2nd3rd3rd3rd3rd
P0766
P0776		Shift solenoid valve S4, Shift solenoid valve SL2 or Valve body (brake control valve):
Malfunction		1st2nd3rd3rd3rd3rd
P0781Valve body (1-2 shift valve):
Malfunction		1st*21st*23rd3rd3rd3rd
P0729Valve body (sequence valve):
Malfunction		1st2nd3rd3rd3rd3rd
  • HINT:
*1: Actual gear shift (gear position) under fail-safe operation.
*2: Under engine braking, downshifting to 1st or 2nd gear is prohibited.
AB60F AUTOMATIC TRANSMISSION / TRANSAXLE
Land Cruiser URJ200 URJ202 GRJ200 VDJ200
AUTOMATIC TRANSMISSION SYSTEM for 3UR-FE