CM2150 Electronic Control System – 019-031   Electronic Control Module (ECM)

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Table of Contents

Initial Check
Remove
Install

Initial Check

TOC

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.

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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 the ECM. If the ECM will
not communicate with the service tool, see the Communication Error – Electronic Service Tool or Control Device symptom tree.

Record the values of ECM Distance Offset, ECM Time Offset, Engine Distance Offset, and Engine Time Offset prior to replacement or calibration of the ECM. These parameters can be found in the Trip Information section of Features and Parameters.

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Remove

TOC

The ECM location varies by engine type. See the engine diagram for ECM mounting location.

NOTE: 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 ECM power harness, engine harness, and OEM harness connectors from the ECM, if they are
not already disconnected.

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

Remove the ECM.

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Install

TOC

 CAUTION 

Do not paint the back side of the ECM. Make sure no grease or dirt is between the ECM and the mounting plate.

Install the new ECM to the mounting plate. Tighten the capscrews.

Torque Value:  18  n.m  [160 in-lb]

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 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 ECM power harness, engine harness, and OEM harness connectors to the ECM. Tighten the connector capscrews to the ECM connectors.

Torque Value:  3  n.m  [27 in-lb]

NOTE: When an ECM is replaced, the new ECM
must be calibrated.
Refer to Procedure 019-032 (ECM Calibration Code) 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.

For ISC and ISL engines with CM2150, install the injector trim codes by following the steps in Procedure 006-026 (Injector) in Section 6 of the Service Manual, ISC and ISL CM2150. This step is applicable in the event the ECM is replaced or if an ECM becomes ROM booted.

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Last Modified:  16-May-2007