Fail-Safe

FAIL-SAFE

The A/T control unit has an electronic Fail-Safe (limp home mode) to allow the vehicle to be driven even in the event of damage of a major electrical input or output device circuit.

In this condition, the vehicle runs in third gear in the third gear positions 1, 2 or D and will not upshift. Customer may say "Sluggish, poor acceleration".

When Fail-safe operation occurs the next time the key is turned to the ON position, the A/T check lamp will blink for about 8 seconds.

If the vehicle is driven under extreme conditions such as excessive wheel spinning and emergency braking suddenly after, Fail-safe my be activated even if all electrical circuits are undamaged.

In this case, normal shift pattern can be returned by turning the ignition key OFF for 3 seconds and then back ON.

The blinking of the A/T check lamp for about 8 seconds will repeat only once and be cleared. The customer may resume normal driving conditions by chance.

Always follow the "Work Flow".

The SELF DIAGNOSIS results will be as follows:

The first SELF DIAGNOSIS will indicate the damage of the vehicle speed sensor or the revolution sensor.
During the next SELF DIAGNOSIS perform after checking the sensor, no damages will be indicated.