Engine Diagnostics Support
52
© 2021 Cypress Solutions
Complete Manual: CTM-200 R2 (Revision 1.4)
16.
Engine Diagnostics Support
As part of the general reporting system, the CTM-200 is capable of monitoring a variety of Engine
Diagnostic parameters. These parameters can be used as events or triggers to generate reports. In addition
to the reporting of real time Engine parameters the CTM-200 processes key parameters to deliver
accumulated values for fuel consumption, fuel rate, Idle time and engine hours. Engine Diagnostic support is
available via the CTM-200 on board CAN interface. The CAN interface supports vehicles using the ISO-
15765-4 (2008 and newer small and light duty vehicles) protocol and the J1939 protocol (heavy duty
vehicles). Vehicles that do not support the CAN interface can be supported using the Cypress Solutions E-
VDT (Engine vehicle diagnostics transmitter).
When CAN support has been enabled on the CTM-200 and the cables connected. Engine/vehicle
parameters will be available to the CTM-200. The CTM-200 can use the available Engine/Vehicle
parameters for accurate real time calculation of:
•
Total Fuel
1
•
Fuel Rate
1
•
Total Engine Hours
•
Total Idle Time
•
Odometer
2
1
Fuel calculation is dependent on the vehicle ECU providing a parameter that can be used to
determine fuel consumption such as MAF (mass air flow) sensor or fuel tank level values.
2
In some cases Vehicle odometer is available from the vehicle ECU, in cases where this is not
available the on board odometer on the CTM-200 can be set to match the vehicle odometer
The above values are stored in non-volatile internal memory on the CTM-200 are available to AVL tracking
applications.
In addition many other Engine/vehicle parameters are available. Engine/vehicle parameters vary based on
vehicle make, model, and year of manufacture. Contact Cypress Solutions for a complete list of supported
vehicles.
For vehicles where the connection to the vehicle ECU is not possible or not available the CTM-200 can take
advantage of GPS sensor information and calculate an accurate GPS based
odometer
value.
