Code 13, No Rpm Signal: Notes

ECM monitors crank angle and camshaft positions, and supplies .7 volt to crank angle and Camshaft Position (CMP) sensors. As signal rotor rotates, voltage is toggled high and low. ECM determines crank angle and camshaft positions by toggled voltage input.

Code 13 will set if ECM does not detect crank angle input with engine speed greater than 1500 RPM for .3 second or more.

1. Checks for faults in crank angle input low circuitry and ECM.
2. Checks for faults in crank angle input high circuitry and ECM. Also for a misadjusted signal rotor air gap.

Fig 1: Code 12 Schematic (Except LSi) No RPM Signal

Fig 2: Code 12 Flow Chart (Except LSi) No RPM Signal