Fail-Safe Chart
- FAIL-SAFE CHART
- This function minimizes the loss of the ECT functions when a malfunction occurs in each sensor or solenoid.FAIL-SAFE CHART
Malfunction Part Function DTC P0710, P0712 and P0713:
No. 1 ATF Temperature SensorDuring a No. 1 ATF temperature sensor malfunction, up-shift to the 5th gear and flex lock-up clutch control are prohibited. DTC P0722:
Output Speed Sensor (SP2)During an output speed sensor malfunction, shift control is effected through the input speed sensor signal (NT). DTC P0751, P0756, P0771, P0973, P0974, P0976, P0977, P0985 and P0986:
Shift Solenoid Valve S1, S2 and SRThe current to the failed solenoid valve is cut off and control is effected by operating the other solenoid valves with normal operation. Shift control is effected depending on the failed solenoid as described in the table below. DTC P0748, P0776 and P0778:
Shift Solenoid Valve SL1 and SL2During a solenoid valve SL1 or SL2 malfunction, up-shift to the 5th gear is prohibited. DTC P02714 and P2716:
Shift Solenoid Valve SLTDuring 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 effected through normal clutch pressure control. DTC P2757:
Shift Solenoid Valve SLUDuring 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. - Fail-safe function:
If either of the shift solenoid valve circuits has an open or short failure, the ECM turns the other shift solenoid ON and OFF in order to shift into the gear positions shown in the table below.
In case of a short circuit, the ECM stops sending current to the short circuit solenoid. Even if starting the engine again in the fail-safe mode, the gear position remains in the same position.
FAIL-SAFE FUNCTION CHARTPosition Normal Shift Solenoid S1 Malfunction Gear S1 S2 SR SL1 SL2 Gear S1 S2 SR SL1 SL2 R R ON OFF OFF OFF ON R X OFF OFF OFF ON D 1st ON OFF OFF OFF ON 4th
↓
3rdX OFF
↓
ONOFF OFF ON 2nd ON ON OFF OFF ON 3rd X ON OFF OFF ON 3rd OFF ON OFF OFF ON 3rd X ON OFF OFF ON 4th OFF OFF OFF OFF ON 4th X OFF OFF OFF ON 5th OFF OFF ON ON OFF 5th X OFF ON ON OFF 4 1st ON OFF OFF OFF ON 4th
↓
3rdX OFF
↓
ONOFF OFF ON 2nd ON ON OFF OFF ON 3rd X ON OFF OFF ON 3rd OFF ON OFF OFF ON 3rd X ON OFF OFF ON 4th OFF OFF OFF OFF ON 4th X OFF OFF OFF ON 3 1st ON OFF OFF OFF ON 3rd
↓
3rd E/BX OFF
↓
ONOFF OFF ON
↓
OFF2nd ON ON OFF OFF ON 3rd
↓
3rd E/BX ON OFF OFF ON
↓
OFF3rd E/B OFF ON OFF OFF OFF 3rd E/B X ON OFF OFF OFF 2 1st ON OFF OFF OFF ON 1st X OFF OFF OFF ON 2nd E/B ON ON ON OFF OFF 3rd E/B X ON ON OFF OFF L 1st E/B ON OFF OFF OFF OFF 1st E/B X OFF OFF OFF OFF X: Malfunction FAIL-SAFE FUNCTION CHARTPosition Shift Solenoid S2 Malfunction Shift Solenoid SR Malfunction Gear S1 S2 SR SL1 SL2 Gear S1 S2 SR SL1 SL2 R R ON X OFF OFF ON R ON OFF X OFF ON D 1st ON X OFF OFF ON 1st ON OFF X OFF ON 1st
↓
4thON
↓
OFFX OFF OFF ON 2nd ON ON X OFF ON 4th OFF X OFF OFF ON 3rd OFF ON X OFF ON 4th OFF X OFF OFF ON 4th OFF OFF X OFF ON 5th OFF X ON ON OFF 4th OFF OFF X ON OFF 4 1st ON X OFF OFF ON 1st ON OFF X OFF ON 1st
↓
4thON
↓
OFFX OFF OFF ON 2nd ON ON X OFF ON 4th OFF X OFF OFF ON 3rd OFF ON X OFF ON 4th OFF X OFF OFF ON 4th OFF OFF X OFF ON 3 1st ON X OFF OFF ON 1st ON OFF X OFF ON 1st
↓
3rd E/BON
↓
OFFX OFF OFF ON
↓
OFF2nd ON ON X OFF ON 3rd E/B OFF X OFF OFF OFF 3rd E/B
↓
3rdOFF ON X OFF OFF
↓
ON2 1st ON X OFF OFF ON 1st ON OFF X OFF ON 2nd E/B
↓
4thON
↓
OFFX ON OFF OFF
↓
ON2nd ON ON X OFF OFF L 1st E/B ON X OFF OFF OFF 1st E/B ON OFF X OFF OFF X: Malfunction FAIL-SAFE FUNCTION CHARTPosition Shift Solenoid S1 and S2 Malfunction Shift Solenoid S1 and SR Malfunction Gear S1 S2 SR SL1 SL2 Gear S1 S2 SR SL1 SL2 R R X X OFF OFF ON R X OFF X OFF ON D 4th X X OFF OFF ON 4th
↓
3rdX OFF
↓
ONX OFF ON 4th X X OFF OFF ON 3rd X ON X OFF ON 4th X X OFF OFF ON 3rd X ON X OFF ON 4th X X OFF OFF ON 4th X OFF X OFF ON 5th X X ON ON OFF 4th X OFF X ON
↓
OFFOFF
↓
ON4 4th X X OFF OFF ON 4th
↓
3rdX OFF
↓
ONX OFF ON 4th X X OFF OFF ON 3rd X ON X OFF ON 4th X X OFF OFF ON 3rd X ON X OFF ON 4th X X OFF OFF ON 4th X OFF X OFF ON 3 3rd
↓
3rd E/BX X OFF OFF ON
↓
OFF3rd X OFF
↓
ONX OFF ON 3rd
↓
3rd E/BX X OFF OFF ON
↓
OFF3rd X ON X OFF ON 3rd E/B X X OFF OFF OFF 3rd E/B
↓
3rdX ON X OFF OFF
↓
ON2 1st X X OFF OFF ON 1st X OFF X OFF ON 4th X X ON OFF OFF
↓
ON2nd X ON X OFF OFF L 1st E/B X X OFF OFF OFF 1st E/B X OFF X OFF OFF X: Malfunction FAIL-SAFE FUNCTION CHARTPosition Shift Solenoid S2 and SR Malfunction Shift Solenoid S1, S2 and SR Malfunction Gear S1 S2 SR SL1 SL2 Gear S1 S2 SR SL1 SL2 R R ON X X OFF ON R X X X OFF ON D 1st ON X X OFF ON 4th X X X OFF ON 1st
↓
4thON
↓
OFFX X OFF ON 4th X X X OFF ON 4th OFF X X OFF ON 4th X X X OFF ON 4th OFF X X OFF ON 4th X X X OFF ON 4th OFF X X ON
↓
OFFOFF
↓
ON4th X X X ON
↓
OFFOFF
↓
ON4 1st ON X X OFF ON 4th X X X OFF ON 1st
↓
4thON
↓
OFFX X OFF ON 4th X X X OFF ON 4th OFF X X OFF ON 4th X X X OFF ON 4th OFF X X OFF ON 4th X X X OFF ON 3 1st ON X X OFF ON 3rd X X X OFF ON 1st
↓
3rdON
↓
OFFX X OFF ON 3rd X X X OFF ON 3rd E/B
↓
3rdOFF X X OFF OFF
↓
ON3rd E/B
↓
3rdX X X OFF OFF
↓
ON2 1st ON X X OFF ON 1st X X X OFF ON 1st E/B
↓
1stON X X OFF OFF
↓
ON1st E/B
↓
1stX X X OFF OFF
↓
ONL 1st E/B ON X X OFF OFF 1st E/B X X X OFF OFF X: Malfunction HINT: - ↓: Condition in the electrical malfunction is shown above "↓".
- ↓: Condition in the fail-safe mode is shown below "↓".
- E/B: Engine brake.
- This function minimizes the loss of the ECT functions when a malfunction occurs in each sensor or solenoid.