Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. Verify the electronic control module (ECM) calibration is correct. If an injector circuit fault is active, and the faulty condition is repaired, the fault will become inactive once the engine is restarted, or if the engine is permitted to idle for more than 1 minute. The ECM will attempt to enable any disabled injector circuit whenever the engine is started and approximately once per minute while the engine is running. The injector will be disabled for the faulty cylinder.The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the cylinder(s) that are faulty.Īction Taken When the Fault Code is Active: If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. The ECM senses current as each injector is actuated. This diagnostic runs continuously when the engine is running. Each housing pass-through connector provides power and return for two injectors. Internal injector harnesses are located under the valve cover and connect the injectors to the engine harness at the pass-through connectors. The engine harness connects the ECM to three injector circuit pass-through connectors that are located in the rocker housing. Has a dedicated low-side switch that completes the circuit path to Likewise, the injectors for cylinders 4, 5, and 6 (rear bank) also The injectors for cylinders 1, 2,Īnd 3 (front bank) share a single high-side switch that connects theĮCM. There are two high-side switches and six low-side The solenoid by closing a high-side and a
The electronic control module (ECM) energizes
The injector solenoid valves control fueling quantity and injection EFFECT: Engine can misfire or possibly run rough.
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