FAIL-SAFE CHART
System information
| FAIL-SAFE CHART |
*1: AI (Artificial Intelligence) -SHIFT control
In addition to the switching of the shift pattern through the pattern select switch, the 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. As a result, a comfortable ride has been realized.
| Malfunction Part |
Function |
| DTC P0717: Input Speed Sensor (NT) |
During an input speed sensor malfunction, shift control is effected through the output speed sensor signal (SP2). During an input speed sensor malfunction, up-shift to the 5th and 6th, AI-SHIFT*1 and flex lock-up clutch control are prohibited. |
| DTC P0500: Output Speed Sensor (SP2) |
During an output speed sensor malfunction, shift control is effected through the input speed sensor signal (NT). During an output speed sensor malfunction, up-shift to the 5th and 6th, AI-SHIFT*1 and flex lock-up clutch control are prohibited. |
| DTC P0710, P0712, P0713: ATF Temperature Sensor |
During an ATF temperature sensor malfunction, up-shift to the 5th and 6th and flex lock-up clutch control are prohibited. |
| Shift Solenoid Valve S1, S2, S3, S4 and SR |
The current to the failed solenoid valve is cut off and control is effected by operating the other solenoid valves. Shift control is effected depending on the failed solenoid as described in the table on the next page. |
| DTC P0748, P0778: Shift Solenoid Valve SL1 and SL2 |
During a solenoid valve SL1 or SL2 malfunction, up-shift to the 5th and 6th and flex lock-up clutch control are prohibited. |
| 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, fuel economy decreases. |
| DTC P02714, 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, the shift shock increases. However, shifting is effected through normal clutch pressure control. |
Fail-safe operation for electronically malfunctioning shift solenoid valve (S1, S2, S3, S4 and SR):
- HINT:
- Fail-safe operation in the event of an electric system malfunction.
- 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 circuited solenoid.
- Even if staring the engine again in the fail-safe mode, the gear position remains in the same position.
Fail-safe chart for electrical malfunction: Shift Lever Position
Normal
Gear
Shift solenoid (ECM output)
S1
S2
S3
S4
SR
SL1
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
Shift Lever Position
Shift Solenoid Valve S1 Electrical Malfunction (P0973, P0974)
Gear*2
Shift solenoid (ECM output)
S1
S2
S3
S4
SR
SL1
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
1st (E/B)→4th
X
ON→OFF
ON→OFF
OFF
ON
OFF
OFF→ON
S1
1st (E/B)
X
ON
ON
OFF
ON
OFF
OFF
- HINT:
- *2: Actual gear shift (gear position) under fail-safe operation.
- X: OFF (the ECM stops sending current to a malfunctioning solenoid valve)
- →: Condition in the electrical malfunction is shown on the left of "→".
Condition in the fail-safe mode is shown on the right of "→".
- (E/B): Engine brake
- *2: Actual gear shift (gear position) under fail-safe operation.
Shift Lever Position
Shift solenoid Valve S2 Electrical Malfunction (P0976, P0977)
Gear*2
Shift solenoid (ECM output)
S1
S2
S3
S4
SR
SL1
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
ON→OFF
OFF
3rd→3rd (E/B)
ON
X
ON
OFF
ON
ON→OFF
OFF
3rd (E/B)
ON
X
ON
OFF
ON
OFF
OFF
S2
3rd→3rd (E/B)
OFF→ON
X
ON
OFF
ON
ON→OFF
OFF
3rd (E/B)
ON
X
ON
OFF
ON
OFF
OFF
S1
3rd (E/B)
OFF→ON
X
ON
OFF
ON
OFF
OFF
- HINT:
- *2: Actual gear shift (gear position) under fail-safe operation.
- X: OFF (the ECM stops sending current to a malfunctioning solenoid valve)
- →: Condition in the electrical malfunction is shown on the left of "→".
Condition in the fail-safe mode is shown on the right of "→".
- (E/B): Engine brake
- *2: Actual gear shift (gear position) under fail-safe operation.
Shift Lever Position
Shift solenoid Valve S3 Electrical Malfunction (P0979, P0980)
Gear*2
Shift solenoid (ECM output)
S1
S2
S3
S4
SR
SL1
SL2
D,S6
3rd→4th
OFF→ON
ON→OFF
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→4th
OFF→ON
ON→OFF
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→4th
OFF→ON
ON→OFF
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→4th
OFF→ON
ON→OFF
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→4th
OFF→ON
ON→OFF
X
OFF
ON
OFF
ON
6th→4th
ON
ON→OFF
X
OFF
ON
OFF
OFF→ON
S1
1st (E/B)→4th
OFF→ON
ON→OFF
X
OFF
ON
OFF
OFF→ON
- HINT:
- *2: Actual gear shift (gear position) under fail-safe operation.
- X: OFF (the ECM stops sending current to a malfunctioning solenoid valve)
- →: Condition in the electrical malfunction is shown on the left of "→".
Condition in the fail-safe mode is shown on the right of "→".
- (E/B): Engine brake
- *2: Actual gear shift (gear position) under fail-safe operation.
Shift Lever Position
Shift Solenoid Valve S4 Electrical Malfunction (P0982, P0983)
Gear*2
Shift solenoid (ECM output)
S1
S2
S3
S4
SR
SL1
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
- HINT:
- *2: Actual gear shift (gear position) under fail-safe operation.
- X: OFF (the ECM stops sending current to a malfunctioning solenoid valve)
- →: Condition in the electrical malfunction is shown on the left of "→".
Condition in the fail-safe mode is shown on the right of "→".
- (E/B): Engine brake
- *2: Actual gear shift (gear position) under fail-safe operation.
Shift Lever Position
Shift Solenoid Valve SR Electrical Malfunction (P0985, P0986)
Gear*2
Shift solenoid (ECM output)
S1
S2
S3
S4
SR
SL1
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
ON
OFF
ON
OFF
X
OFF
OFF
S2
1st
OFF
ON
ON
OFF
X
OFF
ON
2nd
ON
ON
ON
OFF
X
OFF
OFF
S1
1st
OFF
ON
ON
OFF
X
OFF
OFF
- HINT:
- *2: Actual gear shift (gear position) under fail-safe operation.
- X: OFF (the ECM stops sending current to a malfunctioning solenoid valve)
- →: Condition in the electrical malfunction is shown on the left of "→".
Condition in the fail-safe mode is shown on the right of "→".
- (E/B): Engine brake
- *2: Actual gear shift (gear position) under fail-safe operation.
Fail-safe operation for mechanically malfunction:
- HINT:
- 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.
Fail-safe chart for mechanical malfunction: DTC
Condition
Gear*2
-
Normal
1st
2nd
3rd
4th
5th
6th
P0751
Shift solenoid valve S1:
Stuck OFF malfunction
1st*3
1st*3
↑
3rd
3rd
3rd
P0761
Shift solenoid S3:
Stuck ON malfunction
1st
2nd
↑
3rd
3rd
3rd
P0766
Shift solenoid valve S4, Shift solenoid valve SL2 or Valve body (Brake control valve):
Malfunction
1st
2nd
↑
3rd
3rd
3rd
P0781
Valve body (1-2 shift valve):
Malfunction
1st*3
1st*3
↑
3rd
3rd
3rd
P0729
Valve body (Reverse sequence valve):
Malfunction
1st
2nd
↑
3rd
3rd
3rd
- HINT:
- *2: Actual gear shift (gear position) under fail-safe operation
- *3: Under engine braking, downshifting to 1st or 2nd gear is prohibited.
- *2: Actual gear shift (gear position) under fail-safe operation