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Reduced Engine Power Mode

When the PCM detects a problem with the TAC system the PCM enters one of the following Reduced Engine Power Modes:

Acceleration Limiting

The control module will continue to use the accelerator pedal for throttle control, however the vehicle acceleration is limited.

Limited Throttle Mode

The control module will continue to use the accelerator pedal for throttle control, however the maximum throttle opening is limited.

Throttle Default Mode

The control module will turn off the throttle actuator.

Forced Idle Mode

The control module will limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off, or; ignore the accelerator pedal input.

Engine Shutdown Mode

The control module will disable fuel and de-energize the throttle actuator.