FAIL-SAFE CHART Description The fail-safe function minimizes the loss of operation when a malfunction occurs in a sensor or solenoid.
Fail-safe (a) Fail-safe control list: |
Malfunctioning Part | Function | |
Transmission Revolution Sensor (NT) |
- Lock up clutch control is prohibited.
- High response gear shifts are prohibited.
| | Transmission Revolution Sensor (NC) |
- Lock up clutch control is prohibited.
- High response gear shifts are prohibited.
| | Solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SLT, SLU and SL) valve |
If the ECM detects a solenoid valve malfunction, it performs fail-safe control. | |
ATF temperature sensor |
- Lock up clutch control is prohibited.
- High response gear shifts are prohibited.
| | ECM power supply (voltage is low) |
- When driving in 1st to 5th gear when a malfunction is detected, the transaxle will be fixed in 5th gear.
- When driving in 6th to 8th gear when a malfunction is detected, the transaxle will be fixed in the current gear.
| | Knock sensor |
- When driving in 1st to 5th gear when a malfunction is detected, up-shift to 6th or higher will be prohibited.
- When driving in 6th gear or higher when a malfunction is detected, up-shift to a higher gear will be prohibited.
- Lock up clutch control is prohibited.
- High response gear shifts are prohibited.
| | CAN communication |
- When driving in 1st to 3rd gear when a malfunction is detected, the transaxle will be fixed in 3rd gear.
- When driving in 4th to 8th gear when a malfunction is detected, up-shift to a higher gear will be prohibited.
- Lock up clutch control is prohibited.
- High response gear shifts are prohibited.
| | Solenoid (SLU) valve |
- Lock up clutch control is prohibited.
- Shifting to or from 3rd or 4th gear is prohibited.
- Shifting to or from 6th, 7th or 8th gear is prohibited.
| | Solenoid (SLT) valve |
- Engine output is limited.
- High response gear shifts are prohibited.
- Lock up clutch control is prohibited.
- The transaxle will be fixed in 5th gear.
| (b) Solenoid Valve Normal Operation Chart: |
Gear | 1st |
2nd | 3rd |
4th | 5th |
6th | 7th |
8th | | Solenoid (SL1) Valve |
ON | ON |
ON | ON |
ON | OFF |
OFF | OFF | |
Solenoid (SL2) Valve |
OFF | OFF |
OFF | OFF |
ON | ON |
ON | ON | |
Solenoid (SL3) Valve |
OFF | OFF |
ON | OFF |
OFF | OFF |
ON | OFF | |
Solenoid (SL4) Valve |
OFF | OFF |
OFF | ON |
OFF | ON |
OFF | OFF | |
Solenoid (SL5) Valve |
OFF | ON |
OFF | OFF |
OFF | OFF |
OFF | ON | |
Solenoid (SL6) Valve | ON |
OFF | OFF |
OFF | OFF |
OFF | OFF |
OFF | (c) Fail-safe Control Chart:
*1: Operation of fail-safe is canceled the first time the vehicle is stopped.
*2: Operation of fail-safe is not canceled for subsequent times the vehicle is stopped.
Fail-safe operation is performed when the ECM detects a malfunction. Fail-safe Control Chart (Solenoid (SL1) Valve) |
Gear Under Normal Conditions |
1st | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th |
|
*: Neutral
| | ON malfunction (without fail-safe control) |
1st | 2nd |
3rd | 4th |
5th | 4th to 5th |
3rd to 5th | 5th | |
Fail-safe control during ON malfunction |
1st | 2nd |
3rd | 4th |
5th | 5th |
5th | 5th | |
OFF malfunction (without fail-safe control) |
N* | N* |
N* | N* |
N* | 6th |
7th | 8th | |
Fail-safe control during OFF malfunction |
6th | 6th |
6th | 6th |
6th | 6th |
7th | 8th | Fail-safe Control Chart (Solenoid (SL2) Valve) |
Gear Under Normal Conditions |
1st | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th |
|
*: Neutral
| | ON malfunction (without fail-safe control) |
5th | 5th |
3rd to 5th | 4th to 5th |
5th | 6th |
7th | 8th | |
Fail-safe control during ON malfunction |
5th | 5th |
5th | 5th |
5th | 6th |
7th | 8th | |
OFF malfunction (without fail-safe control) |
1st | 2nd |
3rd | 4th |
N* | N* |
N* | N* | |
Fail-safe control during OFF malfunction |
1st | 2nd |
3rd | 4th |
4th | 4th |
4th | 4th | Fail-safe Control Chart (Solenoid (SL3) Valve) |
Gear Under Normal Conditions |
1st | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th |
|
*: Neutral
| | ON malfunction (without fail-safe control) |
3rd | 3rd |
3rd | 3rd |
3rd to 5th | 7th |
7th | 7th | |
Fail-safe control during ON malfunction |
3rd | 3rd |
3rd | 3rd |
3rd | 7th |
7th | 7th | |
OFF malfunction (without fail-safe control) |
1st | 2nd |
N* | 4th |
5th | 6th |
N* | 8th | |
Fail-safe control during OFF malfunction |
1st | 2nd |
4th | 4th |
5th | 6th |
6th | 8th | Fail-safe Control Chart (Solenoid (SL4) Valve) |
Gear Under Normal Conditions |
1st | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th |
|
*: Neutral
| | ON malfunction (without fail-safe control) |
4th | 4th |
3rd | 4th |
4th to 5th | 6th |
7th | 6th | |
Fail-safe control during ON malfunction |
4th | 4th |
4th | 4th |
4th | 6th |
6th | 6th | |
OFF malfunction (without fail-safe control) |
1st | 2nd |
3rd | N* |
5th | N* |
7th | 8th | |
Fail-safe control during OFF malfunction |
1st | 2nd |
3rd | 5th |
5th | 7th |
7th | 8th | Fail-safe Control Chart (Solenoid (SL5) Valve) |
Gear Under Normal Conditions |
1st | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th |
|
*: Neutral
| | ON malfunction (without fail-safe control) |
N* | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th | |
Fail-safe control during ON malfunction |
2nd | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th | |
OFF malfunction (without fail-safe control) |
1st | N* |
3rd | 4th |
5th | 6th |
7th | N* | |
Fail-safe control during OFF malfunction |
3rd | 3rd |
3rd | 4th |
5th | 6th |
7th | 7th | Fail-safe Control Chart (Solenoid (SL6) Valve) |
Gear Under Normal Conditions |
1st | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th |
|
*: Neutral
| | ON malfunction (without fail-safe control) |
1st | N* |
3rd | 4th |
5th | 6th |
7th | N* | |
Fail-safe control during ON malfunction |
3rd | 3rd |
3rd | 4th |
5th | 6th |
7th | 7th | |
OFF malfunction (without fail-safe control) |
N* | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th | |
Fail-safe control during OFF malfunction |
2nd | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th | Fail-safe Control Chart (Solenoid (SLT) Valve) |
Gear Under Normal Conditions |
1st | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th | |
OFF malfunction (without fail-safe control) (MAX Pressure) |
1st | 5th |
3rd to 5th | 4th to 5th |
5th | 4th to 5th |
3rd to 5th | 5th | |
Fail-safe control during ON malfunction |
Fixed in 5th | Fail-safe Control Chart (Solenoid (SLU) Valve) |
Gear Under Normal Conditions |
1st | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th |
|
*: Neutral
| | ON malfunction (without fail-safe control) |
1st | 2nd |
3rd or N* | 4th or N* |
5th | 6th or N* |
7th or N* | 8th | |
Fail-safe control during ON malfunction |
1st | 2nd |
5th | 5th |
5th | 5th |
5th | 8th | Fail-safe Control Chart (Solenoid (SL) Valve) |
Gear Under Normal Conditions |
1st | 2nd |
3rd | 4th |
5th | 6th |
7th | 8th |
|
*: Neutral
| | ON malfunction (without fail-safe control)
(MIN Pressure) | 1st |
2nd | 3rd or N* |
4th or N* | 5th |
6th or N* | 7th or N* |
8th | | Fail-safe control during ON malfunction |
1st | 2nd |
5th | 5th |
5th | 5th |
5th | 8th |
HINT: In the case of an open or short, the ECM stops sending current to the open or shorted solenoid. |
