2B Hex

Scan Tool 43 (MIL 43):

Trouble Code Number
- Scan tool 43
- General scan tool P0351
- MIL 43

Fault Message
- Lean Operation at Wide Open Throttle

Background
- The PCM provides the ground control circuit for the primary side of ignition coil.
- Battery voltage is supplied through the MFI relay (ASD relay).

Range of Check
- Battery voltage: 13 V or more (engine is running)
- MFI relay (ASD relay): ON
- Engine: 3,000 r/min or less
- Engine speed and ignition timing are always stable.

Set Condition
- The primary circuit is not achieving peak current with maximum dwell for 3 seconds.

Probable Cause
- Ignition coil wiring harness or connector failed
- Open circuit in ignition coil
- PCM failed