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, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 5 (ENGINE CONTROL SYSTEM - 4.2L - DTC P0135 TO P0418)DTC P0351-P0356CIRCUIT/SYSTEM TESTING
2006 Isuzu Ascender S, 5.3 M, 4WD
Circuit/System Testing
2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Turn OFF the ignition.
- Disconnect the PCM.
- Test the affected IC circuit for a high resistance, an open, a short to ground, and for a short to voltage.
- If a fault is found, repair the circuit as needed.
- Connect the PCM.
- Exchange the affected ignition coil with the ignition coil of a good cylinder.
- Start the engine and observe the scan tool.
- If the DTC transfers with the suspect ignition coil, replace as needed.
- If the DTC does not transfer with the suspect ignition coil, replace the PCM.
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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.