Cummins ISX11.9 CM2250 – Service Manual 019-031   Electronic Control Module (ECM)

• Turn the keyswitch to the ON position while monitoring the fault lamps. The fault lamps must illuminate for 2 to 3 seconds.
• If the lamps do not illuminate, check for burned out bulbs.

• Turn the keyswitch to the OFF position.
• Connect INSITE™ electronic service tool to the vehicle data link.
• Turn the keyswitch to the ON position.
• Select the Monitor Mode on INSITE™ electronic service tool. INSITE™ electronic service tool must be able to communicate with the electronic control module (ECM). If the ECM will not communicate with INSITE™ electronic service tool, use the ECM – No Communication Troubleshooting Tree in Section TF before requesting authorization to replace the ECM.
• Record the values of ECM Distance Offset, ECM Time Offset, Engine Distance Offset, and Engine Time Offset prior to replacing or calibrating the ECM. These parameters can be found in the Trip Information section of Features and Parameters.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Record all programmable parameters, features, and calibration information from the old ECM before disconnecting the harness connectors. This information will be needed to program the new ECM.
• Disconnect the batteries. Refer to the OEM service manual.

Disconnect the OEM harness connector (1), engine harness connector 1 (2), and the engine harness connector 2 (3) from the ECM.

Remove the capscrews that secure the ECM to the ECM cooling plate.

CAUTION  Do not paint the backside of the ECM. Make sure there is no grease or dirt between the ECM and the engine block.

• Install the new ECM to the cooling plate.
• Tighten the capscrews.

CAUTION  Do not blow compressed air into the ECM ports or connectors. Compressed air can contain moisture due to condensation.

• Use quick-dry electrical contact cleaner, Part Number 3824510, to remove all dirt and moisture from the ECM connector ports and the harness connectors.

• Connect the OEM harness connector (1), engine harness connector 1 (2), and engine harness connector 2 (3) to the ECM.
• Tighten the connector capscrews to the ECM.

NOTE: When an ECM is replaced, the new ECM must be calibrated. Refer to Procedure 019-032 in Section 19.

• Adjust the values of ECM Distance Offset, ECM Time Offset, Engine Distance Offset, and Engine Time Offset after calibrating the ECM. These parameters can be found in the Trip Information section of Features and Parameters.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Connect the batteries. Refer to the OEM service manual.
• Operate the engine and check for correct operation.