DD15 Troubleshooting – Section 26.2 SPN 103/FMI 1

Section 26.2
SPN 103/FMI 1

This diagnosis is typically turbocharger speed below threshold (High Box).‪

Check as follows:‪

1. Inspect the entire air intake system for leaks and/or restrictions.
   1. If leaks or restrictions are found, repair as necessary. Refer to "26.2.1 Verify Repairs" .
   2. If no air intake system leaks or restrictions are found, go to the next step.
2. Connect to DDDL 7.0
3. Turn the ignition ON (key On, engine OFF).
4. Perform the DDDL Turbo Hysteresis Test.
   1. If the test passed, replace the Turbo Speed Sensor (TSS). Refer to "26.2.1 Verify Repairs" .
   2. If the test failed, refer to the HDE Service Manual (6SE800).

Section 26.2.1
Verify Repairs

Check 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.