This diagnosis is typically injector #4, 5, or 6 needle control valve circuit has a short to
battery/power.
96.1.1 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 2 on the MCM side of the Rear Injector Harness 12–pin
connector and ground.
[a] If there is voltage present, repair the short to power between pin 2 of the Rear
Injector Harness 12–pin connector and pin 16 of the 120–pin MCM connector.
Refer to section 96.1.1.1.
[b] If there is no voltage present, go to step 4.
4. Measure the voltage between pin 2 on the MCM side of the Rear Injector Harness 12–pin
connector and ground.
[a] If there is voltage present, repair the short to power between pin 3 of the Rear Injector
Harness connector and pin 22 of the 120–pin MCM connector. Refer to section
96.1.1.1.
[b] If there is no voltage present, repair the short to power between pin 5 of the
Rear Injector Harness connector and pin 24 of the 120–pin MCM connector.
Refer to section 96.1.1.1.
96.1.1.1 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.
