CM2150 Electronic Control System – FAULT CODE 2765

  Printable Version

Overview

ISC and ISL – Electronic Control Module SMALL | MEDIUM | LARGE

Circuit Description

The injector solenoid valves are actuated by the electronic control module (ECM) to control fuel metering and timing. Each injector solenoid is connected to the ECM by a supply and a return wire. An electrical pulse is sent to the injector from the ECM on the supply wire and returns to the ECM on the return wire, after actuating the solenoid. Each solenoid valve is normally open and is only closed by an electrical pulse from the ECM during fuel injection and metering.

Component Location

The engine harness connects the ECM to three injector circuit pass-through connectors that are located in the rocker housing. Internal injector harnesses are located under the valve cover and connect the injectors to the engine harness at the pass-through connectors. Each pass-through connector provides power and return to two injectors.

Conditions for Running the Diagnostics

This diagnostic runs continuously when the engine is running.

Conditions for Setting the Fault Codes

The ECM detects that the injector barcode values have not been entered correctly into the ECM.

Action Taken When the Fault Code is Active

• The fault code will be set active when the injector barcode parameters are not adjusted correctly.

Conditions for Clearing the Fault Code

The fault code will clear immediately after the correct injector barcode values have been entered with INSITE™ electronic service tool.

Shop Talk

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. Refer to Procedure 019-032 (ECM Calibration Code) in Section 19 in the corresponding Troubleshooting and Repair Manual for the engine being serviced.

Each fuel injector has a specific barcode. The barcode data contains specific injector information. This barcode information needs to be entered into the ECM with INSITE™ electronic service tool. If an engine is found to have incorrect injector barcode values, the correct injector barcode values must be entered. The engine symptom of incorrect barcode values can include rough idle. The factory installed injector barcode values can be found in QuickServe™ Online by entering the correct engine serial number (ESN), selecting Service, and then Engine Dataplate. The correct injector barcode values for that ESN are contained in the engine dataplate section. If the engine has had a previous repair involving the replacement of injectors, the valve cover must be removed to determine the injector barcodes values on the replacement injectors. Use INSITE™ electronic service tool to enter the barcode values into the ECM for this fault code to go inactive.

Refer to Troubleshooting Fault Code t05-2765