Series 60 DDEC VI Troubleshooting – Section 131.1 SPN 4259/FMI 3

Section 131.1
SPN 4259/FMI 3

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

Section 131.1.1
Short to Battery/Power Check

Check as follows:‪

1. Disconnect the Rear Injector Harness 12–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 12–pin connector and ground.
   1. If there is voltage present, repair the short to power between pin 1 of the Rear Injector Harness 12–pin connector and pin 4 of the 120–pin MCM connector. Refer to "131.1.1.1 Verify Repairs" .
   2. If there is no voltage present, go to step 4 .
4. Measure the voltage between pin 8 on the MCM side of the Rear Injector Harness 12–pin connector and ground.
   1. If there is voltage present, repair the short to power between pin 8 of the Rear Injector Harness connector and pin 8 of the 120–pin MCM connector. Refer to "131.1.1.1 Verify Repairs" .
   2. If there is no voltage present, repair the short to power between pin 12 of the Rear Injector Harness connector and pin 6 of the 120–pin MCM connector. Refer to "131.1.1.1 Verify Repairs" .

Section 131.1.1.1
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.