P0351

Tests 338 - 342:

Tests 343 - 345:

SYMPTOM
P0351 - IGNITION COIL # 1 PRIMARY CIRCUIT

WHEN MONITORED
With battery voltage greater than 8 volts during engine cranking or greater than 12 volts with engine running, engine speed less than 2016 rpm, and none of the coils in dwell when checked.

SET CONDITION
Peak current is not achieved with battery based dwell plus 1.5 msec of diagnostic offset. It takes less than 3 seconds during cranking or up to 6 seconds while running to set.

POSSIBLE CAUSES
- Wiring harness intermittent defect
- Open/high resistance in the ASD relay output circuit
- Coil driver # 1 circuit open
- Coil driver # 1 circuit shorted to ground
- Ignition coil defective
- PCM defective