Series 60 DDEC VI Troubleshooting – Section 130.2 SPN 4258/FMI 4

Section 130.2
SPN 4258/FMI 4

This diagnosis is typically injector #1, 2, or 3 spill control valve circuit is shorted to ground.‪

Section 130.2.1
Short to Ground Check

Check as follows:‪

1. Disconnect the Front Injector Harness 12–pin connector.
2. Inspect the Front Injector Harness 12–pin connector for bent or spread pins, inspect the connector seal for damage (signs of water or oil intrusion).
   1. If the water or oil intrusion, bent or spread pins are found, repair as necessary.
   2. If connector shows no signs of damage, go to step 3 .
3. Measure the resistance between pin 9 on the valve cover side of the Front Injector Harness 12–pin connector and ground. If you are using J-48671–10 , measure between injector #1 pin 3 and ground.
   1. If the resistance is greater than 3 Ω, go to step 11 .
   2. If the resistance is less than 3 Ω, go to step 4 .
4. Remove the valve cover.
5. Disconnect injector #1.
6. Measure the resistance between pin 9 on the valve cover side of the Front Injector Harness 12–pin connector and ground. If you are using J-48671–10 , measure between injector #1 pin 3 and ground.
   1. If the resistance is greater than 3 Ω, replace the #1 injector. Refer to "130.2.1.1 Verify Repairs" .
   2. If the resistance is less than 3 Ω, go to step 7 .
7. Disconnect injector #2.
8. Measure the resistance between pin 9 of the valve cover side on the Front Injector Harness 12–pin connector and ground. If you are using J-48671–10 , measure between injector #2 pin 3 and ground.
   1. If the resistance is greater than 3 Ω, replace the #2 injector. Refer to "130.2.1.1 Verify Repairs" .
   2. If the resistance is less than 3 Ω, go to step 9 .
9. Disconnect injector #3.
10. Measure the resistance between pin 9 on the valve cover side of the Front Injector Harness 12–pin connector and ground.
    1. If the resistance is greater than 3 Ω, replace the #3 injector. Refer to "130.2.1.1 Verify Repairs" .
    2. If the resistance is less than 3 Ω, replace the under valve cover Injector Harness. Refer to "130.2.1.1 Verify Repairs" .
11. Disconnect the 120–pin MCM connector.
12. Measure the resistance between pin 9 on the Front Injector Harness 12–pin connector and ground. If you are using J-48671–10 , measure between injector #3 pin 3 and ground.
    1. If the resistance is less than 3 Ω, repair the short to ground between pin 11 of the MCM 120–pin connector and pin 9 of the Front Injector Harness 12–pin connector. Refer to "130.2.1.1 Verify Repairs" .
    2. If the resistance is greater than 3 Ω, call the Detroit Diesel Customer Support Center at 313–592–5800 for MCM replacement authorization.

Section 130.2.1.1
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.