Reduced Engine Power Mode
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Isuzu Ascender, 2005 GMC Envoy XUV, 2005 GMC Envoy XL, 2005 GMC Envoy, and 2005 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
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 perform the following actions:
- Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off.
- Ignore accelerator pedal input.
- Engine Shutdown Mode-The control module will disable fuel and de-energize the throttle actuator.