CM871 and CM876 Electronic Control Systems, ISX and ISM Engines – FAULT CODE 649

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Overview

Maintenance Reminder SMALL | MEDIUM | LARGE

Circuit Description

The electronic control module (ECM) informs the driver of a maintenance event by using the Maintenance Monitor feature’s lubrication oil drain limits.

Component Location

The oil filter is located on the exhaust side of the engine, and the oil fill port varies by application. Refer to Procedure 100-002 (Engine Diagrams) in Section E for a detailed component location for the oil filter and refer to the original equipment manufacturer (OEM) manual for the location of the oil fill port.

Conditions for Running the Diagnostics

This diagnostic runs continuously when the keyswitch is in the ON position.

Conditions for Setting the Fault Codes

The ECM detects that based on the programmable setting in the Maintenance Monitor feature, the engine oil and filter needs to be changed.

Action Taken When the Fault Code is Active

• The ECM illuminates the amber CHECK ENGINE light immediately when the maintenance condition is exceeded.

Conditions for Clearing the Fault Code

The ECM will turn off the amber CHECK ENGINE light immediately after the Maintenance Monitor feature has been reset using 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.

This fault code will only become active if the Maintenance Monitor is enabled in INSITE™ electronic service tool. Make sure that the oil and filter are changed before clearing the fault.

Refer to Troubleshooting Fault Code t05-649