Detroit Diesel EPA07 Series 60 DDEC VI Troubleshooting Manual page 843

[a] If the resistance is greater than 3 Ω, replace the under valve cover injector harness.
Refer to section 117.1.1.1.
[b] If the resistance is less than 3 Ω, go to step 17.
17. Measure the resistance between pin 2 on the valve cover side of the Front Injector Harness
and ground. If using J-48671–10, measure between injector #1 pin 4 and ground.
[a] If the resistance is greater than 3 Ω, replace injector #1. Refer to section 117.1.1.1.
[b] If the resistance is less than 3 Ω, replace the under valve cover injector harness.
Refer to section 117.1.1.1.
18. Measure the resistance between pin 2 on the valve cover side of the Front Injector Harness
and ground. If using J-48671–10, measure between injector #1 pin 4 and ground.
[a] If the resistance is greater than 3 Ω, repair the short to ground between pin 14 of the
120–pin MCM connector and pin 2 of the Front Injector Harness 12–pin connector.
Refer to section 117.1.1.1.
[b] If the resistance is less than 3 Ω, go to step 19.
19. Remove the upper valve cover.
20. Disconnect the injector #1 connector.
21. Measure the resistance between pin 2 on the valve cover side of the Front Injector Harness
and ground. If using J-48671–10, measure between injector #1 pin 4 and ground.
[a] If the resistance is greater than 3 Ω, replace injector #1. Refer to section 117.1.1.1.
[b] If the resistance is less than 3 Ω, replace the under valve cover injector harness.
Refer to section 117.1.1.1.
117.1.1.1 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.
All information subject to change without notice.
Copyright © 2007 DETROIT DIESEL CORPORATION
SERIES 60 DDEC VI TROUBLESHOOTING GUIDE
117-5