DDEC TROUBLESHOOTING
43.1 DESCRIPTION OF FLASH CODE 43
Flash Code 43 indicates that the ECM has detected that the engine coolant level has dropped
below the recommended safe operating range, see Figure 43-1.
There is a significant difference between the coolant level sensors used in Detroit Diesel
Electronic Controls (DDEC) II and DDEC III applications.
Externally, the sensors physically look the same.
The sensor used for the DDEC II system has a black colored connector.
The sensor used for the DDEC III system has an off-white colored connector.
A coolant level module must be used with all coolant level sensors for DDEC II applications. All
DDEC III applications, except Volvo, do not require a coolant level module.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
43-3
