Section 30.2
SPN 111/FMI 3

This condition is typically a circuit failed high.‪

Section 30.2.1
Open Circuit Check

Check as follows:‪

1. Check for multiple codes.
   1. If other faults are active in addition to fault 111/3, troubleshoot the other faults first.
   2. If only fault 111/3 is active, go to step 2 .
2. Disconnect the ECL Sensor.
3. Measure the resistance between pin 1 and 2 of the ECL Sensor.
   1. If the resistance is greater than 600 kΩ (submerged) or open, replace ECL sensor. See Figure "Engine Coolant Level Sensor Installation for CPC" . Refer to "30.2.1.1 Verify Repairs" .
      

      Figure 1. Engine Coolant Level Sensor Installation for CPC

   2. If the resistance is less than 600 kΩ, go to step 4 .
4. Turn the ignition ON (key On, engine OFF).
5. Measure the voltage between pins 1 and 2 of the ECL Sensor harness connector.
   1. If the voltage is greater than 2.75 volts, go to step 7 .
   2. If the voltage is less than 2.75 volts, go to step 6 .
6. Measure the voltage between pin 1 of the ECL Sensor harness connector and ground.
   1. If the voltage is greater than 2.75 volts, repair the open between pin 2 of the CPC #3 connector and the ECL Sensor harness. Refer to "30.2.1.1 Verify Repairs" .
   2. If the voltage is less than 2.75 volts, repair the open between pin 11 of the CPC #3 connector and the ECL Sensor harness. Refer to "30.2.1.1 Verify Repairs" .
7. Disconnect the CPC #3 connector.
8. Measure the resistance between pins 1 and 2 of the ECL Sensor harness connector.
   1. If the resistance is less than 5 Ω, repair the short between the ECL Sensor harness connector pins 1 and 2 and pins 2 and 11 of the CPC #3 connector. Refer to "30.2.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, review steps 3 through 8 . If the results are the same, call the Detroit Diesel Customer Support Center (313–592–5800).

Section 30.2.1.1
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.