Pinpoint Test Z: Injection Control Pressure Sensor: Description
Perform this test when directed here by QUICK TEST. Injection Control Pressure (ICP) sensor is a variable capacitance sensor that, when supplied with a 5-volt reference signal from Powertrain Control Module (PCM), produces a linear analog voltage signal that indicates pressure. ICP sensor's primary function is to provide a feedback signal to indicate rail pressure, so that PCM can command correct injector timing and pulse width and correct injection control pressure for proper fuel delivery at all speed and load conditions. If PCM detects a malfunctioning ICP sensor, CHECK ENGINE light is illuminated and PCM will go to open-loop control of injection control pressure and will operate from an estimated injection control pressure. DTC 1212 indicates ICP voltage not at expected level. DTC 1280 indicates ICP circuit out of range (low). DTC 1281 indicates ICP circuit out of range (high). DTC 1284 indicates ICP failure and will abort KOER CYLINDER CONTRIBUTION SELF-TEST.