Circuit Description

Ignition voltage is supplied directly to fuel injectors. PCM controls each fuel injector by grounding the control circuit through the internal solid state device called the driver.

Primary function of driver is to supply ground for component being controlled. Each driver has a fault line which is monitored by PCM. When PCM is commanding a component on, voltage of control circuit should be low (near zero). When PCM is commanding control circuit to component off, voltage potential of circuit should be high (near battery voltage). If fault detection circuit senses a voltage other than what is expected, this DTC will set.

PCM will monitor injector circuit for short to ground, short to voltage, open circuit or an internally shorted or excessively low resistance at injector. If PCM detects any of these malfunctions, this DTC will set and affected driver will be disabled. PCM will continue to test circuit and if fault disappears, driver will be reactivated. DTC is set when engine is running or when ignition voltage is 9-17 volts and PCM detects an incorrect voltage potential on the ignition control circuit.