Series 60 DDEC V Troubleshooting – Section 46.2 Troubleshooting Flash Code 43, PID 111/Fmi1

Section 46.2
Troubleshooting Flash Code 43, PID 111/Fmi1

This code indicates that the coolant level is below the CLS/ECL Sensor probe (see Figure "Coolant Level Sensor Location" ) or the ACLS/AECL Sensor probe if there are two coolant level sensors. Add coolant and return to service. If the code persists with the level of coolant full, contact Detroit Diesel Customer Service Center (313–592–5800).‪

Figure 1. Coolant Level Sensor Location

Figure 2. Add Engine Coolant Level Sensor Location - Radiator Surge Tank

The following procedure will troubleshoot Flash Code 43:‪

Section 46.2.1
Coolant Level Low

Perform the following steps to diagnose the coolant level low.‪

1. Turn ignition ON; plug in diagnostic tool.
2. Read active codes.
   1. If code 111/1 is logged, there is an indication of a low coolant level condition. Add coolant to ensure coolant level probe is immersed in coolant.
   2. If code 111/1 remains active, refer to "46.2.2 Replace Coolant Level Sensor" .

Section 46.2.2
Replace Coolant Level Sensor

Using the sensor tester may be of assistance. Use Tool J 37164. ‪

Note: When replacing the coolant level sensor, the CLS/ECL Sensor could be an OEM supplied part.

1. Turn ignition OFF; replace CLS/ECL Sensor.
2. Turn ignition ON.
3. Read active codes.
   1. If no codes are logged, troubleshooting is complete.
   2. If codes are logged, refer to "46.2.3 Clean and Check Alternator Grounds" .

Section 46.2.3
Clean and Check Alternator Grounds

Perform the following steps to check the alternator ground.‪

1. If the grounds are clean and good, troubleshooting is complete.
2. If the grounds are damaged, repair the ground circuit and verify repairs. Refer to "46.2.3.1 Verify Repairs" .

Section 46.2.3.1
Verify Repairs

Perform the following steps to verify repairs‪

1. Turn ignition OFF.
2. Reconnect all connectors.
3. Turn ignition ON.
4. Clear diagnostic tool codes.
5. Start and run the engine for one minute.
6. Stop engine.
7. Check diagnostic tool for codes.
   1. If no codes are logged, troubleshooting is complete.
   2. If code 111/1, and any other codes are logged, refer to "46.2.1 Coolant Level Low" , and repeat the procedure, or contact the Detroit Diesel Customer Support Center (313-592-5800).
   3. If any code other than 111/1 is logged, refer to "18.3 First Step for Diagnosing a Fault Within the DDEC System" .