Fail-Safe

The A/T control unit has an electronic Fail-Safe (limp home mode). This allows the vehicle to be driven even if a major electrical input/output device circuit is damaged.

Under Fail-Safe, the vehicle always runs in third gear, even with a shift lever position of "1", "2" or "D". The customer complaint may be "sluggish, or poor acceleration".

When the ignition key is turned ON under Fail-Safe operation, the O/D OFF indicator lamp blinks for about 8 seconds.

Fail-Safe may occur without electrical circuit damage if the vehicle is driven under extreme conditions(such as excessive wheel spin followed by sudden braking). To recover normal shift pattern, turn the ignition key OFF for 5 seconds, then ON.

The O/D OFF indicator lamp blinks for about 8 seconds, but will appear only once. This indicates the Fail-safe (limp home mode) is cleared. The customer may resume normal driving.

Always follow the Work Flow.

The SELF-DIAGNOSIS results will be as follows:
- The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution sensor.
- During the next SELF-DIAGNOSIS, performed after checking the sensors, no damage will be indicated.