MBE 900 DDEC VI Troubleshooting – Section 56.1 SPN 651/FMI 6

Section 56.1
SPN 651/FMI 6

This diagnosis is typically the injector cylinder #1 control valve circuit shorted to battery.‪

Section 56.1.1
Injector Cylinder #1 Control Valve Circuit Shorted to Battery.

Check as follows:‪

  1. Turn the ignition OFF.
  2. Disconnect the MCM 120–pin connector (if using J-48475 breakout box and appropriate overlay, only hook up the MCM side connector).
  3. Turn the ignition ON.
    Click to see this graphic in a separate window

    Figure 1. Injector #1

  4. Measure the voltage between pin 26 of the MCM 120–pin connector and ground. See Figure "Injector #1" .
    1. If voltage is present, contact the Detroit Diesel Customer Support Center at 313–592–5800 for MCM authorization.
    2. If no voltage is present, repair short to power between MCM 120–pin connector pin 26 and injector #1. See Figure "Injector #1" .

EPA07 MBE 900 DDEC VI Troubleshooting Guide - 6SE580
Generated on 10-13-2008