Series 60 DDEC VI Troubleshooting – Section 95.1 SPN 2797/FMI 3

Section 95.1
SPN 2797/FMI 3

This diagnosis is typically injector #1, 2, or 3 needle control valve circuit has a short to battery/power.‪

Section 95.1.1
Short to Battery/Power Check

Check as follows:‪

1. Disconnect the Front 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 Front Injector Harness 12–pin connector and ground.
   1. If there is voltage present, repair the short to power between pin 1 of the Front Injector Harness 12–pin connector and pin 26 of the 120–pin MCM connector. Refer to "95.1.1.1 Verify Repairs" .
   2. If there is no voltage present, go to step 4 .
4. Measure the voltage between pin 2 on the MCM side of the Front Injector Harness 12–pin connector and ground.
   1. If there is voltage present, repair the short to power between pin 3 of the Front Injector Harness connector and pin 22 of the 120–pin MCM connector. Refer to "95.1.1.1 Verify Repairs" .
   2. If there is no voltage present, repair the short to power between pin 5 of the Front Injector Harness connector and pin 24 of the 120–pin MCM connector. Refer to "95.1.1.1 Verify Repairs" .

Section 95.1.1.1
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.