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7A–26 AUTOMATIC TRANSMISSION (AW30-40LE) DTC P0120 (FLASHING CODE 21) ANALOG THROTTLE SIGNAL FAILURE (VTH) D07RY00023 Circuit description: Fail-safe control: Failure detection: •When the throttle input voltage is detected less than 0.112V or more than 4.417V for 2.0 seconds. Contents of control: •Throttle opening for line pressure control ... Throttle opening 100% •Throttle opening for shift control ... Throttle opening 0% •Lock-up control inhibit •Up hill and down hill control inhibit •Squat control inhibit At failure decision Executes following items in addition to above control •Blinks "CHECK TRANS" lamp •Stores the failure information in failure-memory Conditions of turning "CHECK TRANS" lamp off: Reversion conditions from fail-safe: Immediately recovers when the throttle input voltage At failure decision Recovers at the same time as the conditions of Test description: The following numbers correspond to circled numbers on (1) Check that the throttle input voltage is 0.25 to 0.45V. (2) At this test, check that as the throttle opens, the voltage goes up and that the voltage reaches 3.74 to (3) Check the power supply voltage (4.75 – 5.25V) of the throttle position sensor. Diagnostic aids: |