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.
Ignition discharge module: Diagnostics: Notes
- If there is an open circuit in the power supply to the ignition discharge module, the voltage on all the trigger leads will be 0V and diagnostic trouble code P1310 will be generated.
- If there is an open circuit on an individual trigger lead, diagnostic trouble codes will not be generated.
Combustion signals
If there is an open circuit on both leads to control module pins 53 and 6, the ignition and injection will not be synchronized. Knock detection will then take place in parallel on cylinders 1+4 and cylinders 2+3.
- If there is an open circuit to control module pin 53, diagnostic trouble code P1312 will be generated.
- If there is an open circuit to control module pin 6, diagnostic trouble code P1334 will be generated.
- If the ignition cannot be synchronized to the camshaft position, diagnostic trouble code P0340 will be generated.
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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.
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