Notes On Intermittents

Remove crank fuse and check continuity on circuit No. 806 from crank fuse to ECM terminal B3. Check for intermittent opens while manipulating wiring.

If Code EO18 doesn't set immediately after cranking, check for arcing at spark plug wires, loose engine grounds, or other sources of electromagnetic interference. Large transient voltage surges can erase crank signal from the ECM's memory and cause Code EO18 to be set while driving.

Fig 1: ECM Code E018, Open crank Signal Circuit Schematic

Fig 2: Flow Chart, Code E018, Open crank Signal Circuit