FAIL-SAFE CHART
1. Fail-safe
This function minimizes the loss of operation when any abnormality occurs in a sensor or solenoid.
Fail-safe Control List
Malfunction Part |
Function |
---|---|
Transmission revolution sensor (NT) |
During a transmission revolution sensor (NT) malfunction, shift control is performed based on the transmission revolution sensor (SP2) signal. |
Transmission revolution sensor (SP2) |
During a transmission revolution sensor (SP2) malfunction, shift control is performed based on the wheel speed sensor signal. |
ATF temperature sensors (No. 1 and No. 2) |
During an ATF temperature sensor malfunction, up-shifting to 5th and 6th is prohibited. |
Shift solenoid valve SL1, SL2, SL3 and SL4 |
Stop the conduction of electric power to a failed solenoid and shift gears by turning on/off normal solenoids. If all solenoids are malfunctioning, gears will be selected through mechanical hydraulic circuits. |
Shift solenoid valve SLT |
During a shift solenoid valve SLT malfunction, the current to the shift solenoid valve is stopped. However, shifting is performed through normal clutch pressure control. |
Shift solenoid valve SLU |
During a shift solenoid valve SLU malfunction, the current to the shift solenoid valve is stopped. This stops lock-up control, thus decreasing fuel economy. |
Gear Position |
1st |
2nd |
3rd |
4th |
5th |
6th |
---|---|---|---|---|---|---|
Shift solenoid valve SL1 |
ON |
ON |
ON |
ON |
OFF |
OFF |
Shift solenoid valve SL2 |
OFF |
OFF |
OFF |
ON |
ON |
ON |
Shift solenoid valve SL3 |
OFF |
ON |
OFF |
OFF |
OFF |
ON |
Shift solenoid valve SL4 |
OFF |
OFF |
ON |
OFF |
ON |
OFF |
Gear Position under Normal Conditions |
1st |
2nd |
3rd |
4th |
5th |
6th |
|
---|---|---|---|---|---|---|---|
Shift solenoid valve SL1 |
ON Malfunction (without Fail-safe Control)* |
1st |
2nd |
3rd |
4th |
4th |
4th |
OFF Malfunction (without Fail-safe Control) |
1st to N |
2nd to N |
3rd to N |
4th to N |
5th |
6th |
|
Fail-safe Control during OFF Malfunction |
Fixed in 3rd or 5th |
||||||
Shift solenoid valve SL2 |
ON Malfunction (without Fail-safe Control)* |
1st to 4th |
2nd to 4th |
3rd to 4th |
4th |
5th |
6th |
OFF Malfunction (without Fail-safe Control) |
1st |
2nd |
3rd |
4th to 1st |
5th to N |
6th to N |
|
Fail-safe Control during OFF Malfunction |
Fixed in 2nd or 3rd |
||||||
Shift solenoid valve SL3 |
ON Malfunction (without Fail-safe Control)* |
1st to 2nd |
2nd |
3rd |
4th |
5th |
6th |
OFF Malfunction (without Fail-safe Control) |
1st |
2nd to 1st |
3rd |
4th |
5th |
6th to N |
|
Fail-safe Control during OFF Malfunction |
Fixed in 3rd |
||||||
Shift solenoid valve SL4 |
ON Malfunction (without Fail-safe Control)* |
3rd |
3rd |
3rd |
4th |
5th |
5th |
OFF Malfunction (without Fail-safe Control) |
1st |
2nd |
3rd to 1st |
4th |
5th to N |
6th |
|
Fail-safe Control during OFF Malfunction |
Fixed in 2nd |
Rear Speed Sensor RH Malfunction (C1403,C1404)
DESCRIPTION
The speed sensor detects wheel speed and sends the appropriate signals to the
skid control ECU (brake actuator assembly). These signals are used for brake control.
The speed sensor rotors have rows of alternating N and S magnetic poles and their
magnetic fields change when the roto ...
Additional Key cannot be Registered
DESCRIPTION
If additional registration is not possible, a malfunction in the certification
ECU (smart key ECU assembly), engine switch, electrical key transmitter sub-assembly
or steering lock ECU (steering lock actuator or UPR bracket assembly) is suspected.
CAUTION / NOTICE / HINT
NOTICE ...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
ECM
Millimeter Wave Radar Sensor Assembly
Cruise control operation signal
Accelerator pedal idle position signal
Accel overr ...