Electronic Control System Signature, ISX and QSX15 Engines – 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 lamps do not illuminate, check for burned-out bulbs.

Turn the keyswitch to the OFF position.

Connect an electronic service tool to the vehicle datalink.

Turn the keyswitch to the ON position.

Select the monitor mode on the electronic service tool. The electronic service tool must be able to communicate with ECM. If the ECM will not communicate with the service tool, refer to the Communication Error – Electronic Service Tool or Control Device symptom tree.

CAUTION  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 actuator, sensor and OEM harness connectors from the ECM if they are not already removed.

Remove the metric capscrews that secure the ECM to the engine block.

CAUTION  Do not paint the backside of the ECM. Make sure no grease or dirt is 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.

CAUTION  Use only Cummins® recommended electrcial contact grease, Part Number 3822934. Other lubricants, such as lubricating oil or grease, in the connectors can cause ECM damage, poor engine performance, or premature connector pin wear.

Apply a thin coating of lubricant to the connector nosepiece.

Spread the lubricant across the connector nosepiece so it enters every pin hole and lubricates the contacts. Lubricant must not be visible on the surface of the connector.

Connect the actuator, sensor, and OEM harness connectors 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.