MBE 4000 DDEC VI Troubleshooting – Section 28.2 SPN 103/FMI 1

Section 28.2
SPN 103/FMI 1

This diagnosis is typically turbocharger speed below threshold ‪

Section 28.2.1
Equipment Check

Check equipment as follows:‪

1. Disconnect the Turbo Speed Sensor.
2. Measure the resistance across pins 1 and 2 of the Turbo Speed Sensor.
   1. If the resistance is 0 or greater than 1k Ω, replace the Turbo Speed Sensor. Refer to "28.2.1.1 Verify Repairs" .
   2. If the resistance is less than 1k Ω, go to step 3 .
3. Visually inspect the turbocharger for damage.
   1. If damage is found, repair as necessary. When the repairs are done, refer to "28.2.1.1 Verify Repairs" .
   2. If no visible damage is found, go to step 4 .
4. Using Artisan, perform the turbocharger self test.
   1. If the self test fails, repair the turbo/actuator as necessary. When the repairs are done, refer to "28.2.1.1 Verify Repairs" .
   2. If the self test results are satisfactory, go to step 5 .
5. Perform the engine oil pressure.
   1. If the fuel pressure is not within specifications, repair the lubrication system as necessary. When the repairs are done, refer to "28.2.1.1 Verify Repairs" .
   2. If the oil pressure is within specifications, contact the Detroit Diesel Customer Support Center (313–592–5800).

Section 28.2.1.1
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.