Description of on-Board Diagnostics

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 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 O.D. OFF indicator lamp will blink for about 8 seconds.


REMARKS

If the vehicle is driven under extreme conditions such as excessive wheel spinning and emergency braking suddenly after, Fail-Safe may be activated even if all electrical circuits are undamaged. In this case, normal shift pattern can be returned by turning key OFF for 3 seconds and then back ON. The blinking of the 0.0. OFF indicator lamp for about 8 seconds will appear only once and be cleared.
Always follow the "FLOW OF DIAGNOSIS". Flow of Diagnosis

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 performed after checking the sensor, no damages will be indicated.