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Fault List for CPi-2.
If you have a FAULT, press the plus(+) key in this window and see if the FAULT clears.
This window displays any Faults with the system. A maximum of 4 faults can be displayed. Some faults are latching,
Fuse1,Fuse2, Map sensor and Hall sensor are latching meaning that even if the fault is only for a short time, the cpu
keeps the fault code in memory so it can be seen. Press +1 key to for the cpu to try to clear Fuse, Hall and Map
faults. If the fault was momentary it will clear, but if the fault still exists the fault will remain on display. Other faults
like Voltages, Comms, Other will clear if the conditions change and the particular parameter is within limits.
On Dual board units you may need to Press the PROG key and check the Backup unit and view its Fault window to
see what is wrong in the B board. There is limited communication between dual boards, the Primary “A” board does
not know what the specific fault is with the Backup ”B” board, just that there is a problem.
Fault List chart
Fault will display
Explanation
VOLTS
Mainbus power weak or no power
BATLO
Backup battery weak or not connected or battery fuse blown.
HALL
Check hall sensor, magnets, connections and wiring.
CHG P
Power switching circuits problem. Water inside ecu box or malfunction on board.
OTHER
Primary is seeing a fault in the backup “B” system board. Vice-versa applies.
COMMS
Dual board only. CPU boards not communicating, one may have no power.
Fuse1 or Fuse2
Problem with 10amp Coil fuses for coilpack power. Check fuses on side of gold ecu.
Map
Map sensor hit high or low voltage limits.
VCOIL
Hi c12V power source low or not present.
If you have a FAULT, press the plus(+) key in this window and see if the FAULT clears.
Fuse1, Fuse2, Hall, Map Need to be cleared by pressing the plus(+) key while in this
window or the Gauge1 window
LOP, Lean Of Peak Ignition advance.
Ignition advance for Lean Of Peak is adjusted using this window.
When the LOP key is pressed and the LED is lit, then there will be
extra ignition advance to help power under leaner fuel running.
Note, that engine manifold pressure must be lower than the
LOP MAX MANIFOLD PRESSURE setting, and engine RPM’s
must be 1100 rpm or higher for the extra ignition advance.
On Dual board ecu’s if you change this setting, make sure you also press the PROG key and change the
setting in the “B” backup ecu so the timing matches on both the “A” Primary and “B” backup ecu’s.
Knock Retard and Knock Sense
Airplanes, make sure Kock Retard is zero and
Knock Sense is 1.
Knock retard is the amount of
degrees per knock event. Knock Sensitivity
adjusts the gain of the knock sensor circuit.
Crank Retard
Extra ignition retard needed for engine cranking. This amount doesn’t show up in
gauge mode, but it does occur if you watch using a timing light. It helps correct
timing as the engine slows under compression during cranking. This retard
disappears above 120 RPM’s. Keep at 15 minimum for all types of engines.
