MBE 900 DDEC VI Troubleshooting – Section 59.1 SPN 654/FMI 6

Section 59.1
SPN 654/FMI 6

This test is typically for Injector Cylinder #4 Control Valve Circuit Shorted to Battery.‪

Section 59.1.1
Injector Cylinder #4 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.
   

   Figure 1. Injector #4

4. Measure the voltage between pin 16 of the MCM 120–pin connector and ground. See Figure "Injector #4" .
   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 16 and injector #4. See Figure "Injector #4" .