DD15 Troubleshooting – Section 25.4 SPN 100/FMI 18

Section 25.4
SPN 100/FMI 18

This diagnosis is typically very low oil pressure. ‪

Check as follows:‪

1. Check for additional active fault codes.
   1. If fault code 100/3 is active in addition to code 100/18, refer to "26.2 SPN 100/FMI 3" .
   2. If fault code 100/4 is active in addition to code 100/18, refer to "26.3 SPN 100/FMI 4" .
   3. If only fault code 100/18 is active, go to the next step.
2. Start engine and check oil pressure.
   1. If pressure is fluctuating, go to the next step.
   2. If pressure is low but stable, go to step 4 .
3. Stop the engine and allow sufficient time for the oil to drain into the oil pan. Perform the following steps:
   1. Check the oil level. Add recommended oil to bring it to the proper level, if required.
   2. Check for faulty oil gage. Replace, if required.
   3. Check for loose or cracked oil pump suction pipe. Repair or replace, as required.
   4. Check for loose drive or driven oil pump gear. Repair or replace, as required.
   5. Check for faulty oil pressure relief valve. Repair or replace, as required.
   6. Refer to "25.4.1 Verify Repairs" .
4. Stop the engine and allow sufficient time for the oil to drain into the oil pan. Check the oil level.
   1. If oil is above maximum level with no oil previously added, go to the next step.
   2. If oil is not above maximum level, contact Detroit Diesel Customer Support Center (313–592–5800).
5. Check for possible fuel in oil.
   1. If fuel is found, locate and repair source of fuel leak. Change the Oil. Refer to "25.4.1 Verify Repairs" .
   2. If fuel is not found, contact Detroit Diesel Customer Support Center at 313–592–5800.

Section 25.4.1
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.