Section 99.1 SPN 2798/FMI 3

Section 99.1
SPN 2798/FMI 3

This diagnosis is typically injector #4, 5, or 6 needle control valve circuit has a short to battery/power.‪

Check as follows:‪

  1. Disconnect the Rear Injector Harness 14–pin connector.
  2. Turn the ignition ON (key ON, engine OFF).
  3. Measure the voltage between pin 1 on the MCM side of the Rear Injector Harness 14–pin connector and ground.
    1. If there is voltage present, repair the short to power between pin 1 of the Rear Injector Harness 14–pin connector and pin 19 of the 120–pin MCM connector. Refer to "99.1.1 Verify Repairs" .
    2. If there is no voltage present, replace the under valve cover injector harness. Refer to "99.1.1 Verify Repairs" .

Section 99.1.1
Verify Repairs

Verify repairs as follows:‪

  1. Turn ignition OFF.
  2. Reconnect any electrical connections that were disconnected to perform the diagnosis.
  3. Clear codes with DDDL 7.0 or latest version.
    warning

    ENGINE EXHAUST

    To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.‪

  4. Start and bring engine up to operating temperature (over 140°F/60°C).
  5. Verify operation is satisfactory and no warning lamps illuminate. If warning lamps illuminate, troubleshoot the codes. If assistance is required, call the Detroit Diesel Customer Support Center at 313–592–5800.


EPA07 DD15 Troubleshooting Guide - DDC-SVC-MAN-0029
Generated on 10-13-2008

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