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The HPD Formula F package includes 3 basic methods of providing the user/driver with information
regarding the operating conditions of the engine/system and overall integrity of the package.
CAN Communications:
Tachometer Output:
System Diagnostic LED:
Fail codes are displayed via a flashing LED.
Multiple fail codes will be displayed in succession starting with the first diagnosed fail.
The cycle of fail codes is repeated forever until fails are cleared by an ECU boot up.
Each fail code displays the results of more than one failure detection for a
given component. If multiple fails are diagnosed for a given component then
the fail code will be repeated.
SYSTEM MONITORING INFORMATION
The HPD Formula F ECU adheres to the Bosch MS 4.3 Grand-
Am CAN Spec. This link can be utilized with any compatible
dash/steering wheel display. The following parameters are
available:
Engine speed
Throttle position
Coolant temperature
Oil temperature (if optional sensor equipped)
Intake air temperature
Intake manifold air pressure after throttle plate
Battery voltage
Fuel pressure (if optional sensor equipped)
Oil pressure (if optional sensor equipped)
The HPD Formula F ECU provides a +12V square wave analog
tachometer output at 2 pulses per engine revolution.
A diagnostic LED output is provided to assist in the
troubleshooting of potential issues with engine/system operation.
This output behavior is characterized by the following guidelines:
Example: Air Temp sensor fails then Water Temp sensor fails. The DIAG_LED
will first flash the Air Temp fail code then the Water Temp fail code and it will
repeat this cycle until fails are cleared.
Example: Air Temp sensor fails shorted high then Air Temp sensor fails
shorted low then Water Temp sensor fails shorted high. The DIAG_LED
will flash the Air Temp sensor fail code then it will flash the Air Temp
sensor fail code again then it will flash the Water Temp sensor fail code
and it will repeat this cycle until fails are cleared.
HPD L15A7 Electrical Systems Manual
7
2/2010
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