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 410 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 4.2L - DTC P0013 TO DTC P0365)DTC P0017CIRCUIT/SYSTEM TESTING
2006 Isuzu Ascender S, 4.2 S, 4WD
Circuit/System Testing
2006 Isuzu Ascender S, 4.2 S, 4WDSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, inspect the crankshaft balancer bolt for the proper torque. Refer to Fastener Tightening Specifications
.
- If the crankshaft balancer bolt is not at the proper torque, refer to Crankshaft Balancer Replacement .
- Remove the CMP actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Replacement .
- Connect a fused jumper wire between the control circuit of the CMP actuator solenoid and battery voltage. Connect a jumper wire between the low reference circuit of the CMP actuator solenoid and a good ground. The pintle of the solenoid should move.
- If the pintle inside the CMP actuator solenoid does not move, replace the CMP actuator solenoid.
- Inspect the CMP actuator for binding or being stuck. Refer to Camshaft Position Actuator Diagnosis .
- Inspect the engine for correct valve timing. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement .
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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.