Fail-safe Function

When an abnormality occurs in the signal from a sensor, a switch, a solenoid valve, or from another control unit, the PCM ignores that signal and substitutes a pre-programmed value for that signal allows the automatic transmission to continue operation. This causes a Confirmed DTC to be stored and the D indicator to blink and/or the MIL to come on. The transmission may not shift normally driving fail-safe operation. Do not run the test-driving diagnosis when the MIL is ON, or the D indicator is blinking.