Circuit Description

PCM will enable an injector on intake stroke of each cylinder. Ignition voltage is supplied directly to fuel injectors. PCM controls each injector by grounding control circuit via an internal 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 volts). 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. For duplication of DTC, ensure engine is running, and ignition voltage is 9-17 volts.