Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROL SYSTEM - 4.2L - INTRODUCTION (2 OF 2))DESCRIPTION & OPERATIONTHROTTLE ACTUATOR CONTROL (TAC) SYSTEM DESCRIPTIONMODES OF OPERATIONREDUCED ENGINE POWER MODE
2006 Isuzu Ascender S, 5.3 M, 4WD
Reduced Engine Power Mode
2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Reduced Engine Power Mode
WARNING: This page is about a different variant/trim than selected.
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.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.