Centinel System – Repair Manual – 006-006   ECM Cooling Plate, Fuel Cooled

NOTE: Some chassis will allow the ECM to be moved aside with the wiring harness attached, for access to the cooling plate.

• Disconnect the engine wiring harness and OEM harness connectors, if necessary. Refer to Procedure 019-031 in the Troubleshooting and Repair Manual CM870 Electronic Control System Signature and ISX Engines, Bulletin 4021334.

Disconnect the ECM cooling plate fuel supply line (bottom) from the integrated fuel system module and the ECM cooling plate.

Disconnect the ECM cooling plate fuel return line (top) from the fuel pump and the ECM cooling plate.

Remove the five ECM mounting capscrews and the ECM.

Remove the six cooling plate mounting capscrews and washers.

Remove the cooling plate and gasket.

Remove five insulating washers and the one ground washer from the cooling plate mounting holes.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Clean the cooling plate mounting surfaces with solvent.

Dry with compressed air.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

NOTE: If the sealing bead or groove is dirty, a leak can result.

Clean the ECM cooling plate gasket sealing bead with a dry cloth.

Make sure no rust or soot has accumulated in the grooves on either side of, or on top of, the sealing bead.

Use compressed air to remove debris from the grooves, if necessary.

Inspect the five insulating washers and the one ground washer for cracks or other damage.

Replace any washer that is damaged.

Check for cracks or damage to the cooling plate.

Replace the cooling plate if cracks or damage is found.

Check the cooling plate fuel supply and return line fittings on the ECM cooling plate, integrated fuel system module, and fuel pump to make sure the o-rings are installed properly and are not damaged.

Replace the o-ring, fitting, or cooling plate if damaged.

Install five insulating washers. The one ground washer must be installed in the upper left cooling plate mounting capscrew hole.

CAUTION  Make sure that the insulating washers and the ground washer are installed properly on the cooling plate or malfunction of the ECM can occur.

Install the cooling plate gasket.

Install the six cooling plate mounting capscrews and washers.

Install the ECM.

Install and tighten the five ECM mounting capscrews.

Install the ECM cooling plate fuel supply line (bottom) to the integrated fuel system module and the ECM cooling plate.

Install the ECM cooling plate fuel return line (top) to the fuel pump and the ECM cooling plate.

• Connect the ECM harness and engine wiring harness. Refer to Procedure 019-031 in the Troubleshooting and Repair Manual CM870 Electronic Control System Signature and ISX Engines, Bulletin 4021334.
• Start the engine and check for fuel leaks.