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Home >> Chevrolet >> 2000 >> RV Cutaway 6.5 F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - Diesel >> Diagnostic Tests >> DTC P1218: Injection Pump Calibration Circuit >> Circuit Description
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Circuit Description

PCM uses a calibrated resistor mounted internally in injection pump to determine fuel rates. Resistor value is stored in PCM memory. If PCM memory is disturbed or PCM is replaced, PCM will relearn resistor value on next ignition cycle.

DTC will set when ignition is on, and PCM does not currently have a valid resistor value and PCM is unable to read resistor value.