Ignition discharge modules: Diagnostics: Notes

• If an open circuit should occur in the power supply to the ignition discharge module, the voltage on all ignition leads will be 0V and then trouble code P1310 (Bank 1) or P1320 (Bank 2) will be generated.
• If a break occurs in an individual trigger lead, no diagnostic trouble code will 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 firing cannot be synchronized with the camshaft, diagnostic trouble code P0340 will be generated.