DD15 Troubleshooting – Section 97.1 SPN 2791/FMI 3

Section 97.1
SPN 2791/FMI 3

Check as follows:‪

1. Disconnect the EGR valve connector.
2. Turn the ignition ON (key On, engine OFF).
3. Measure the voltage between pin 1 of the EGR valve connector and ground.
   1. If the voltage is greater than 11.5 volts, repair the short to power between pin 1 of the EGR valve connector and pin 61 of the 120–pin MCM connector. Refer to "97.1.1 Verify Repairs" .
   2. If the voltage is less than 11.5 volts, replace the EGR valve.

Section 97.1.1
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.

   ENGINE EXHAUST ‪
   To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.‪

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.