MBE 900 DDEC VI Troubleshooting – Section 30.1 SPN 111/FMI 1

Section 30.1
SPN 111/FMI 1

This is typically low coolant level.‪

Section 30.1.1
Coolant Level Check

Check as follows:‪

1. Turn the ignition ON (key ON. engine OFF).
2. Check for multiple codes.
   1. If other faults are active in addition to fault 111/1, troubleshoot the other faults first.
   2. If only fault 111/1 is active, go to step 3 .
3. Check the coolant level in the reservoir. See Figure "Engine Coolant Level Sensor Mounted in Radiator Top Tank" .
   

   Figure 1. Engine Coolant Level Sensor Mounted in Radiator Top Tank

   1. If the coolant level in the reservoir is not within limit, refer to "30.1.2 Coolant Leak or Faulty Radiator Cap Check" .
   2. If the coolant level in the reservoir is within limit, replace the sensor (see Figure "Engine Coolant Level Sensor Installation for CPC" ). Refer to "30.1.2.1 Verify Repairs" .
   

   Figure 2. Engine Coolant Level Sensor Installation for CPC

Section 30.1.2
Coolant Leak or Faulty Radiator Cap Check

Perform the following steps to resolve a coolant level low fault. Repair as required.‪

1. Check for coolant leak at cylinder head gasket.
2. Check for coolant leak at air compressor head gasket.
3. Check for external coolant leak at hose connections.
4. Check for coolant in oil.
5. Check for loose or faulty radiator cap.
6. When these checks and subsequent repairs are finished, Refer to "30.1.2.1 Verify Repairs" .

Section 30.1.2.1
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.