Checks Prior To Starting Any Troubleshooting - Detroit Diesel Series 60 EGR Technician Manual

INTRODUCTION
BASICS
The following listed items should be checked prior to starting any troubleshooting:
Ensure that the engine serial number on the ECM/ECU matches the serial number on
the cylinder block.
Walk around the vehicle. Look for obvious problems such as leaks (air or liquid).
Inspect the ECM/ECU for worn isolators, debris or bolts lodged between ECM/ECU and
cylinder block.
Ensure the fuel supply shut-off valve is set to full on.
Check that the fuel filter is secure and tight.
Check for a restricted air filter.
Inspect truck frontal area for air flow restriction through the CAC and radiator.
Ensure that the fuel tank level is correct and that the fuel tank is full.
Look for any vehicle damage.
Investigate any prior repairs, if applicable.
Check for broken wiring connectors.
Check for poor mating of the connector halves or terminals not fully seated in the connector
body (backed out terminals).
Look for improperly formed or damaged terminals. All connector terminals in the problem
circuit should be carefully inspected to determine proper contact tension. Use a mating
terminal to test the contact tension.
Check for electrical system interference caused by a defective relay, ECM/ECU driven
solenoid, or a switch causing an electrical surge. Look for problems with the charging
system (alternator, etc.). In certain cases, the problem can be made to occur when the
faulty component is operated as in the case of a relay.
Verify that alternator grounds are clean and making good contact. Disconnect the alternator
belt to test.
Wiggle wires and harnesses to try to make the problem active, or re-occur.
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All information subject to change without notice. (Rev. June 2005)
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION