P1367 — IC Cylinder 7 Not Toggling After Enable

Diagnostic algorithm

1. Verify the code: read codes, record freeze frame, clear codes and attempt to reproduce. If code does not return, monitor for intermittent faults.
2. Inspect coil and connector: remove coil-on-plug, check for carbon tracking, oil, cracked housing, bent pins, or corrosion. Repair or replace as needed.
3. Swap test: swap coil from cylinder 7 with another cylinder. If the fault/misfire follows the coil, replace the coil. If it remains on cylinder 7, continue wiring/ECM checks.
4. Check power and ground: with ignition on, verify battery voltage at the coil power pin and good ground at the ground pin.
5. Backprobe/control test: using a scan tool with output control or while cranking, command the coil and observe the control pin. The driver should toggle; if not, test wiring continuity to the ECM and check for short to battery or ground.
6. Measure coil resistances: primary and secondary per manufacturer specs. Replace coil if out of spec.
7. Use an oscilloscope on the primary to confirm expected waveform and timing relative to engine RPM. Look for missing pulses or flat lines when commanded.
8. Inspect and test related sensors: camshaft and crankshaft position sensors and their circuits if timing/sync could inhibit commands.
9. If wiring and coil check OK and ECM command still not present, test ECM output driver and grounds per factory procedures; consider ECM replacement only after confirming driver-level fault.
10. After repairs, clear codes and road-test to verify the fault does not return.