GSIC - Global Service Information Center

# ELECTRONIC CONTROLLED AUTOMATIC TRANSMISSION SYSTEM > FAIL-SAFE CHART

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FAIL-SAFE CHART

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

Malfunction Part | Function
DTC P0710, P0712 and P0713: No. 1 ATF Temperature Sensor | During 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 SR | The 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 on the next page.
DTC P0748, P0776 and P0778: Shift Solenoid Valve SL1 and SL2 | During a solenoid valve SL1 or SL2 malfunction, up-shift to the 5th gear is prohibited.
DTC P02714 and 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, and shift shock increases. However, shifting is effected through normal clutch pressure control.
DTC P2757: 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.

Position | NORMAL | S1 OFF
Gear | S1 | S2 | SR | SL1 | SL2 | Gear | S1 | S2 | SR | SL1 | SL2
"R" | R | ON | OFF | OFF | OFF | ON | R | OFF | OFF | OFF | OFF | ON
"D" | 1st | ON | OFF | OFF | OFF | ON | 4th → 3rd | OFF | OFF → ON | OFF | OFF | ON
2nd | ON | ON | OFF | OFF | ON | 3rd | OFF | ON | OFF | OFF | ON
3rd | OFF | ON | OFF | OFF | ON | 3rd | OFF | ON | OFF | OFF | ON
4th | OFF | OFF | OFF | OFF | ON | 4th | OFF | OFF | OFF | OFF | ON
5th | OFF | OFF | ON | ON | OFF | 5th | OFF | OFF | ON | ON | OFF
"3" | 1st | ON | OFF | OFF | OFF | ON | 3rd → 3rd E/B | OFF | OFF → ON | OFF | OFF | ON → OFF
2nd | ON | ON | OFF | OFF | ON | 3rd → 3rd E/B | OFF | ON | OFF | OFF | ON → OFF
3rd E/B | OFF | ON | OFF | OFF | OFF | 3rd E/B | OFF | ON | OFF | OFF | OFF
4th | OFF | OFF | ON | OFF | ON | 4th | OFF | OFF | ON | OFF | ON
5th | OFF | OFF | ON | ON | OFF | 5th | OFF | OFF | ON | ON | OFF
"2" | 1st | ON | OFF | OFF | OFF | ON | 1st | OFF | OFF | OFF | OFF | ON
2nd E/B | ON | ON | ON | OFF | OFF | 3rd E/B | OFF | ON | ON | OFF | OFF
3rd E/B | OFF | ON | ON | OFF | OFF | 3rd E/B | OFF | ON | ON | OFF | OFF
4th | OFF | OFF | ON | OFF | ON | 4th | OFF | OFF | ON | OFF | ON
5th | OFF | OFF | ON | ON | OFF | 5th | OFF | OFF | ON | ON | OFF
"L" | 1st E/B | ON | OFF | OFF | OFF | OFF | 1st E/B | OFF | OFF | OFF | OFF | OFF
2nd E/B | ON | ON | ON | OFF | OFF | 3rd E/B | OFF | ON | ON | OFF | OFF
3rd E/B | OFF | ON | ON | OFF | OFF | 3rd E/B | OFF | ON | ON | OFF | OFF
4th | OFF | OFF | ON | OFF | ON | 4th | OFF | OFF | ON | OFF | ON
5th | OFF | OFF | ON | ON | OFF | 5th | OFF | OFF | ON | ON | OFF

Position | S2 OFF | SR OFF
Gear | S1 | S2 | SR | SL1 | SL2 | Gear | S1 | S2 | SR | SL1 | SL2
"R" | R | ON | OFF | OFF | OFF | ON | R | ON | OFF | OFF | OFF | ON
"D" | 1st | ON | OFF | OFF | OFF | ON | 1st | ON | OFF | OFF | OFF | ON
1st → 4th | ON → OFF | OFF | OFF | OFF | ON | 2nd | ON | ON | OFF | OFF | ON
4th | OFF | OFF | OFF | OFF | ON | 3rd | OFF | ON | OFF | OFF | ON
4th | OFF | OFF | OFF | OFF | ON | 4th | OFF | OFF | OFF | OFF | ON
5th | OFF | OFF | ON | ON | OFF | 4th | OFF | OFF | OFF | ON | OFF
"3" | 1st | ON | OFF | OFF | OFF | ON | 1st | ON | OFF | OFF | OFF | ON
1st → 3rd E/B | ON → OFF | OFF | OFF | OFF | ON → OFF | 2nd | ON | ON | OFF | OFF | ON
3rd E/B | OFF | OFF | OFF | OFF | OFF | 3rd E/B → 3rd | OFF | ON | OFF | OFF | OFF → ON
4th | OFF | OFF | ON | OFF | ON | 3rd | OFF | OFF → ON | OFF | OFF | ON → ON
5th | OFF | OFF | ON | ON | OFF | 3rd E/B → 3rd | OFF | OFF → ON | OFF | ON → OFF | OFF → ON
"2" | 1st | ON | OFF | OFF | OFF | ON | 1st | ON | OFF | OFF | OFF | ON
2nd E/B → 4th | ON → OFF | OFF | ON | OFF | OFF → ON | 2nd | ON | ON | OFF | OFF | OFF
Fail 4th | OFF | OFF | ON | OFF | OFF → ON | 2nd | OFF → ON | ON | OFF | OFF | OFF
4th | OFF | OFF | ON | OFF | ON | 1st → 2nd | OFF → ON | OFF → ON | OFF | OFF | ON → OFF
5th | OFF | OFF | ON | ON | OFF | 1st E/B → 2nd | OFF → ON | ON | OFF | ON → OFF | OFF
"L" | 1st E/B | ON | OFF | OFF | OFF | OFF | 1st E/B | ON | OFF | OFF | OFF | OFF
2nd E/B → 4th | ON → OFF | OFF | ON | OFF | OFF → ON | 2nd | ON | ON | OFF | OFF | OFF
Fail 4th | OFF | OFF | ON | OFF | OFF → ON | 2nd | OFF → ON | ON | OFF | OFF | OFF
4th | OFF | OFF | ON | OFF | ON | 1st → 2nd | OFF → ON | OFF → ON | OFF | OFF | ON → OFF
5th | OFF | OFF | ON | ON | OFF | 1st E/B → 2nd | OFF → ON | OFF → ON | OFF | ON → OFF | OFF

Position | S1 S2 OFF | S2 SR OFF
Gear | S1 | S2 | SR | SL1 | SL2 | Gear | S1 | S2 | SR | SL1 | SL2
"R" | R | OFF | OFF | OFF | OFF | ON | R | ON | OFF | OFF | OFF | ON
"D" | 4th | OFF | OFF | OFF | OFF | ON | 1st | ON | OFF | OFF | OFF | ON
4th | OFF | OFF | OFF | OFF | ON | 1st → 4th | ON → OFF | OFF | OFF | OFF | ON
4th | OFF | OFF | OFF | OFF | ON | 4th | OFF | OFF | OFF | OFF | ON
4th | OFF | OFF | OFF | OFF | ON | 4th | OFF | OFF | OFF | OFF | ON
5th | OFF | OFF | ON | ON | OFF | 4th | OFF | OFF | OFF | ON → OFF | OFF → ON
"3" | 3rd → 3rd E/B | OFF | OFF | OFF | OFF | ON → OFF | 1st | ON | OFF | OFF | OFF | ON
3rd → 3rd E/B | OFF | OFF | OFF | OFF | ON → OFF | 1st E/B → 3rd | ON → OFF | OFF | OFF | OFF | ON → ON
3rd E/B | OFF | OFF | OFF | OFF | OFF | 3rd E/B → 3rd | OFF | OFF | OFF | OFF | OFF → ON
4th | OFF | OFF | ON | OFF | ON | 3rd | OFF | OFF | OFF | OFF | ON → ON
5th | OFF | OFF | ON | ON | OFF | 1st E/B → 3rd | OFF | OFF | OFF | ON → OFF | OFF → ON
"2" | 1st | OFF | OFF | OFF | OFF | ON | 1st | ON | OFF | OFF | OFF | ON
Fail 4th | OFF | OFF | ON | OFF | OFF → ON | 1st E/B → 1st | ON | OFF | OFF | OFF | OFF → ON
Fail 4th | OFF | OFF | ON | OFF | OFF → ON | 1st E/B → 1st | OFF → ON | OFF | OFF | OFF | OFF → ON
4th | OFF | OFF | ON | OFF | ON | 1st | OFF → ON | OFF | OFF | OFF | ON
5th | OFF | OFF | ON | ON | OFF | 1st E/B → 1st | OFF → ON | OFF | OFF | ON → OFF | OFF → ON
"L" | 1st E/B | OFF | OFF | OFF | OFF | OFF | 1st E/B | ON | OFF | OFF | OFF | OFF
Fail 4th | OFF | OFF | ON | OFF | OFF → ON | 1st E/B → 1st | ON | OFF | OFF | OFF | OFF → ON
Fail 4th | OFF | OFF | ON | OFF | OFF → ON | 1st E/B → 1st | OFF → ON | OFF | OFF | OFF | OFF → ON
4th | OFF | OFF | ON | OFF | ON | 1st | OFF → ON | OFF | OFF | OFF | ON
5th | OFF | OFF | ON | ON | OFF | 1st E/B → 1st | OFF → ON | OFF | OFF | ON → OFF | OFF → ON

Position | S1 SR OFF | S1 S2 SR OFF
Gear | S1 | S2 | SR | SL1 | SL2 | Gear | S1 | S2 | SR | SL1 | SL2
"R" | R | OFF | OFF | OFF | OFF | ON | R | OFF | OFF | OFF | OFF | ON
"D" | 4th → 3rd | OFF | OFF → ON | OFF | OFF | ON | 4th | OFF | OFF | OFF | OFF | ON
3rd | OFF | ON | OFF | OFF | ON | 4th | OFF | OFF | OFF | OFF | ON
3rd | OFF | ON | OFF | OFF | ON | 4th | OFF | OFF | OFF | OFF | ON
4th | OFF | OFF | OFF | OFF | ON | 4th | OFF | OFF | OFF | OFF | ON
4th | OFF | OFF | OFF | ON → OFF | OFF → ON | 4th | OFF | OFF | OFF | ON → OFF | OFF → ON
"3" | 3rd | OFF | OFF → ON | OFF | OFF | ON → ON | 3rd | OFF | OFF | OFF | OFF | ON → ON
3rd | OFF | ON | OFF | OFF | ON → ON | 3rd | OFF | OFF | OFF | OFF | ON → ON
3rd E/B → 3rd | OFF | ON | OFF | OFF | OFF → ON | 3rd E/B → 3rd | OFF | OFF | OFF | OFF | OFF → ON
3rd | OFF | OFF → ON | OFF | OFF | ON → ON | 3rd | OFF | OFF | OFF | OFF | ON → ON
3rd E/B → 3rd | OFF | OFF → ON | OFF | ON → OFF | OFF → ON | 3rd E/B → 3rd | OFF | OFF | OFF | ON → OFF | OFF → ON
"2" | 1st | OFF | OFF | OFF | OFF | ON | 1st | OFF | OFF | OFF | OFF | ON
2nd | OFF | ON | OFF | OFF | OFF | 1st E/B → 1st | OFF | OFF | OFF | OFF | OFF → ON
2nd | OFF | ON | OFF | OFF | OFF | 1st E/B → 1st | OFF | OFF | OFF | OFF | OFF → ON
1st → 2nd | OFF | OFF → ON | OFF | OFF | ON → OFF | 1st | OFF | OFF | OFF | OFF | ON
1st E/B → 2nd | OFF | OFF → ON | OFF | ON → OFF | OFF | 1st E/B → 1st | OFF | OFF | OFF | ON → OFF | OFF → ON
"L" | 1st E/B | OFF | OFF | OFF | OFF | OFF | 1st E/B | OFF | OFF | OFF | OFF | OFF
2nd | OFF | ON | OFF | OFF | OFF | 1st E/B → 1st | OFF | OFF | OFF | OFF | OFF → ON
2nd | OFF | ON | OFF | OFF | OFF | 1st E/B → 1st | OFF | OFF | OFF | OFF | OFF → ON
1st → 2nd | OFF | OFF → ON | OFF | OFF | ON → OFF | 1st | OFF | OFF | OFF | OFF | ON
1st E/B → 2nd | OFF | OFF → ON | OFF | ON → OFF | OFF | 1st E/B → 1st | OFF | OFF | OFF | ON → OFF | OFF → ON

HINT:

1. →: For electrical malfunctions, the ON/OFF condition is shown to the left of the "→".
2. For fail-safe mode, the ON/OFF condition is shown to the right of the "→".
3. E/B: Engine brake.