MBE 4000 DDEC VI Troubleshooting – Section 132.2 SPN 4227/FMI 4

Section 132.2
SPN 4227/FMI 4

This is typically an open/short to ground.‪

Section 132.2.1
Open/Short to Ground Check

Check as follows:‪

1. Disconnect the Electrostatic Oil Separator connector.
2. Measure the resistance between pins 1 and 2 of the Electrostatic Oil Separator.
   1. If the resistance is greater than 150 Ω, replace the Electrostatic Oil Separator. See Figure "Electrostatic Oil Separator Wiring" . Refer to "132.2.1.1 Verify Repairs" .
   

   Figure 1. Electrostatic Oil Separator Wiring

   2. If the resistance is less than 150 Ω, go to step 3 .
3. Measure the resistance between pins 1 and 3 of the Electrostatic Oil Separator.
   1. If the resistance is greater than 150 Ω, replace the Electrostatic Oil Separator. The replacement procedure may be found in the MBE EPA07 4000 Service Manual (6SE420), refer to 6.5.
   2. If the resistance is less than 150 Ω, go to step 4 .
4. Turn the ignition OFF.
5. Disconnect the 120–pin MCM connector.
6. Measure the resistance between pin 3 of the Electrostatic Oil Separator connector and ground.
   1. If the resistance is greater than 5 Ω, repair the open between pin 3 of the Electrostatic Oil Separator connector and pin 107 of the 120–pin MCM connector. Refer to "132.2.1.1 Verify Repairs" .
   2. If the resistance is less than 5 Ω, repair the short to ground between pin 3 of the Electrostatic Oil Separator connector and pin 107 of the 120–pin MCM connector. Refer to "132.2.1.1 Verify Repairs" .

Section 132.2.1.1
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.