Figure 10. Transmission Control Module
The TCM includes control logic to provide overall Transmission management. The
TCM monitors various speed, load, and clutch inputs in conjunction with the CPC,
which drive the outputs that are required to shift the Transmission.
Check Engine Indicator
Should the Check Engine Indicator come on for any reason, the vehicle can still be
operated and the driver can proceed to the required destination. This condition
should be reported to an authorized Detroit™ service outlet .
Depending on the fault, DDEC® can give a warning only, ramp down engine
power or initiate a shut down. Ramp down will reduce engine power to a
predetermined value, but will not shut down the engine. With the shutdown option,
the engine will begin a stepped power down sequence until it shuts down
completely.
Stop Engine Indicator
When the Stop Engine Indicator comes on, the system has detected a major
malfunction that requires immediate attention. It is the operator's responsibility to
shut down the engine to avoid serious damage.
The conditions that will cause the Stop Engine Indicator to come on are:
• High coolant temperature
• Low coolant level
• High oil temperature
• Low oil pressure
• Auxiliary shutdown
Detroit Diesel Electronic Controls System
36
All information subject to change without notice.
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DDC-SVC-MAN-0217
