DDEC TROUBLESHOOTING
54.1 DESCRIPTION OF FLASH CODE 54
Flash Code 54 indicates that during engine operation the vehicle speed that is measured
by the Vehicle Speed Sensor (VSS) is less than the expected value for the current engine
speed/conditions.
This diagnostic condition is typically:
Open sensor signal circuit
Conditions
Code is logged (without anti-tamper) when the mph >1500 and PW >15
and vehicle
speed < 3 mph.
If code is logged (with or without anti-tamper) mph will be limited.
NOTE:
Code will not be logged for the first five hours of ECMs life (total engine hours).
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
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