LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mitsubishi >> 2020 >> Outlander SP, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transaxle On Vehicle Service (With Diagnostics) >> Automatic Transaxle Diagnosis <A/T> >> Fail-Safe/Backup Function >> Fail-Safe Function
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fail-Safe Function

When a malfunction of a main sensor or actuator is detected by the TCM, the transmission is controlled by pre-set control logic to maintain safe conditions for driving.

The following table shows how the fail-safe/backup function affects vehicle driveability and operation.

Diagnostic trouble code No. Detection items Fail-safe
P0705 Transmission range switch system
  • Fixed at the D range.
  • Manual mode is prohibited.
  • Lock-up is prohibited.
P0712 Transmission fluid temperature sensor system (Short circuit) Not present.
P0713 Transmission fluid temperature sensor system (Open circuit) Fixed to 5th gear during driving, and to 3rd gear after a vehicle stop.
P0715 Input shaft speed sensor system
  • Fixed to the driving gear position during driving, and to 3rd gear after a vehicle stop.
P0720 Output shaft speed sensor system
P0729 6th gear incorrect ratio The current shift position is continued, and gear is fixed to 3rd gear after a vehicle stop.
P0731 1st gear incorrect ratio
  • At engine run-up detection: Fixed to 5th gear after a vehicle stop.
  • At gear ratio abnormality detection: Fixed to 2nd, 3rd, 4th gear.
P0732 2nd gear incorrect ratio The current shift position is continued, and gear is fixed to 5th gear after a vehicle stop.
P0733 3rd gear ratio The current shift position is continued, and gear is fixed to 6th gear after a vehicle stop.
P0734 4th gear incorrect ratio The current shift position is continued, and gear is fixed to 5th gear after a vehicle stop.
P0735 5th gear incorrect ratio The current shift position is continued, and gear is fixed to 2nd gear after a vehicle stop.
P0736 Reverse gear incorrect ratio Controlled by making the line pressure to maximum.
P0741 Torque converter clutch system (Stuck off) Lock-up is prohibited.
P0742 Torque converter clutch system (Stuck on)
P0815 Paddle shift switch (up) system The manual mode operation during the driving cycle(1) in question is prohibited.
P0816 Paddle shift switch (down) system
P0846 2-6 brake pressure switch system Control is continued with always switch on.
P0876 High clutch pressure switch system
P0893 Interlock detection Fixed to a feasible shift position.
P0962 Line pressure linear solenoid valve system (Short circuit) Controlled by making the line pressure to maximum.
P0963 Line pressure linear solenoid valve system (Open circuit)
P0973 Low clutch linear solenoid valve system (Short circuit) Fixed to 5th gear.
P0974 Low clutch linear solenoid valve system (Open circuit)
P0976 2-6 brake linear solenoid valve system (Short circuit) Fixed to 5th gear during driving, and to 3rd gear after a vehicle stop.
P0977 2-6 brake linear solenoid valve system (Open circuit)
P0979 3-5 reverse clutch linear solenoid valve system (Short circuit) Fixed to 5th gear during driving, and to 3rd gear after a vehicle stop.
P0980 3-5 reverse clutch linear solenoid valve system (Open circuit)
P0982 High clutch linear solenoid valve system (Short circuit) Fixed to 5th gear.
P0983 High clutch linear solenoid valve system (Open circuit)
P0988 Low-reverse brake pressure switch system Control is continued with always switch on.
P0998 Low clutch shift solenoid valve system (Short circuit) Not present.
P0999 Low clutch shift solenoid valve system (Open circuit)
P099B Low-reverse brake shift solenoid valve system (Short circuit) Fixed to 5th gear during driving, and to 3rd gear after a vehicle stop.
P099C Low-reverse brake shift solenoid valve system (Open circuit)
P1637 Memory backup system Initial value is set to RAM.
P1705 Throttle position sensor information (engine)
  • Controlled with the throttle position fixed to 2/8 position.
  • Lock-up is prohibited.
P1706 Accelerator pedal position information
  • Controlled with the throttle position fixed to 2/8 position.
  • Lock-up is prohibited.
P1773 ABS Information (ASC) The lock-up during the deceleration and when vehicle speed is 43 km/h (27 mph) or less is prohibited.
P1796 Idle neutral control malfunction Idle neutral control is prohibited.
P2763 Lock-up and Low-reverse brake linear solenoid valve system (Open circuit)
  • Fixed to 5th gear during driving and to 3rd gear after a vehicle stop.
  • Lock-up is prohibited.
P2764 Lock-up and Low-reverse brake linear solenoid valve system (Short circuit)
U0001 CAN bus off
  • Fixed to 5th gear during driving, and to 3rd gear after a vehicle stop.
  • Idle neutral control is prohibited.
U0100 ECM time out
  • Fixed to 5th gear during driving, and to 3rd gear after a vehicle stop.
  • Idle neutral control is prohibited.
U0121 ASC-ECU time out
  • Judges as automatic brake ON.
  • Idle neutral control is prohibited.
U0141 ETACS-ECU time out
  • Judges as brake ON.
  • Idle neutral control is prohibited.
U0317 CAN time-out error (EPB)
  • Judges as automatic brake ON.
  • Idle neutral control is prohibited.
(1) Indicates the series of driving cycle "ignition key OFF → ON → drive → OFF."
scientia non olet · About LEMON Manuals