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.
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HOMESERVICE MANUALSISUZU2006ASCENDER S, 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 587 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 4.2L - DTC P0013 TO P0365)DTC P0017CIRCUIT/SYSTEM VERIFICATION
2006 Isuzu Ascender S, 4.2 S, 4WD
Circuit/System Verification
2006 Isuzu Ascender S, 4.2 S, 4WDSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2009 GMC Envoy and 2009 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The scan tool control of the CMP actuator is inhibited when DTC P0017 sets.
- Operate the vehicle at idle and at various engine speeds and load ranges while observing the Exh. CMP Variance, Desired Exh. CMP, and Exh. CMP Angle parameters with a scan tool.
- The Exh. CMP Variance should remain less than or equal to 1 degree unless the CMP actuator is being commanded. If the CMP actuator is commanded, the Exh. CMP Variance will rise for 1-2 seconds until the Exh. CMP Angle parameter matches the Desired Exh. CMP parameter. The Exh. CMP Variance should again return to less than or equal to 1 degree.
- If the Exh. CMP Variance remains more than 1 degree for more than 3 seconds, continue with the Circuit/System Testing.
RENDER: 1.0x
NO RELATED
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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.