СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ ТАБЛИЦА РАБОТЫ В АВАРИЙНОМ РЕЖИМЕ


  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
    Input turbine speed sensor (speed sensor NT) Shifting to only either 1st or 3rd gear is allowed.
    Counter gear speed sensor (speed sensor NC)

    • The counter gear speed is determined based on the signals from the skid control ECU (speed sensor signals).

    • Shifting from 1st to 4th gear is allowed.
    ATF temperature sensor Shifting from 1st to 4th gear is allowed.

    TCM

    Power supply (voltage is low)

    		 When the vehicle is being driven in 6th gear, the transaxle is fixed in 6th gear. When being driven in any of the gears from 1st to 5th, the transaxle is fixed in 5th gear.
    CAN communication Shifting to only either 1st or 3rd gear is allowed.
    Knock sensor Shifting from 1st to 4th gear is allowed.
    Shift solenoid valve SL1, SL2, SL3 and SL4 The current to the malfunctioning shift solenoid valve is cut off and control is performed by operating the other normal shift solenoid valves. (Shift control in fail-safe mode is described in the table. For details, refer to Fail-Safe Control Chart.)
    Shift Solenoid Valve Operation when Normal
    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
    Fail-safe Control Chart
    Gear position under normal conditions 1st 2nd 3rd 4th 5th 6th
    Shift Solenoid Valve SL1 ON Malfunction (without Fail-safe Control)*1 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
    Fail-safe Control during OFF Malfunction (No. 1 or No. 2 ATF Pressure Switch Malfunctions) Fixed in 3rd or 5th
    Shift Solenoid Valve SL2 ON Malfunction (without Fail-safe Control)*1 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 1st 2nd 3rd 3rd 3rd 3rd
    Fail-safe Control during OFF Malfunction (No. 1 or No. 2 ATF Pressure Switch Malfunctions) Fixed in 2nd or 3rd
    Shift Solenoid Valve SL3 ON Malfunction (without Fail-safe Control)*1 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 1st 3rd 3rd 4th 5th 5th
    Fail-safe Control during OFF Malfunction (No. 1 or No. 2 ATF Pressure Switch Malfunctions) Fixed in 3rd
    Shift Solenoid Valve SL4 ON Malfunction (without Fail-safe Control)*1 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 1st*2 2nd*2 4th*2 4th*2 6th 6th
    Fail-safe Control during OFF Malfunction (No. 1 or No. 2 ATF Pressure Switch Malfunctions) Fixed in 2nd

    Tech Tips


    • *1: Fail-safe control is not activated when an ON malfunction occurs.

    • *2: Shifting to 5th and 6th gear is prohibited.