MBE 900 DDEC VI Troubleshooting – Section 132.1 SPN 4227/FMI 3

Section 132.1
SPN 4227/FMI 3

This is typically a short to power.‪

Section 132.1.1
Short to Power Check

Check as follows:‪

1. Check for multiple codes.
   1. If 615/3 and 2791/3 are present, repair the open between pin 67 of the 120–pin MCM connector and pin 1 of the Electrostatic Oil Separator connector and pin 3 of the EGR valve connector. See Figure "Electrostatic Oil Separator Wiring" . Refer to "132.1.1.1 Verify Repairs" .
      

      Figure 1. Electrostatic Oil Separator Wiring

   2. If only 615/3 is present, turn the ignition OFF and go to step 2 .
2. Disconnect the Electrostatic Oil Separator connector.
3. Turn ignition ON (key ON, engine OFF).
4. Measure the voltage between pins 1 and 2 of the Electrostatic Oil Separator connector.
   1. If the voltage is greater than 11.5 volts, go to step 5 .
   2. If the voltage is less than 11.5 volts, repair the open between pin 1 of the Electrostatic Oil Separator connector and pin 67 of the 120–pin MCM connector. See Figure "Electrostatic Oil Separator Wiring" . Refer to "132.1.1.1 Verify Repairs" .
   

   Figure 2. Electrostatic Oil Separator Wiring

5. Turn the ignition OFF.
6. Disconnect the 120–pin MCM connector.
7. Measure the resistance between pins 2 and 3 of the Electrostatic Oil Separator connector.
   1. If the resistance is greater than 5 Ω, repair the open between pin 2 of the Electrostatic Oil Separator connector and pin 39 of the 120–pin MCM connector. Refer to "132.1.1.1 Verify Repairs" .
   2. If the resistance is less than 5 Ω, repair the short between pin 2 and 3 of the Electrostatic Oil Separator connector and pins 39 and 107 of the 120–pin MCM connector. Refer to "132.1.1.1 Verify Repairs" .

Section 132.1.1.1
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.
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.