ST700 Dash Display System Maintenance
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Check for a more suitable connection point, such as the coil negative
signal.
❑ ECU or ignition system output requires a ‘pull up’ resistor to be fit-
ted
Fit a 1k0 ohm (1000 ohms) resistor from the ECU/ignition to Tacho lead, to
Battery positive B+
Important: Check with the ECU/Ignition system manufacturer that
this will NOT damage their system.
Displayed speed value too high or too low by a constant %-age
amount.
❑ System configured with wrong number of targets per wheel revolu-
tion
Reconfigure the system with correct values.
❑ System configured with the wrong wheel circumference
Reconfigure the system with correct values.
Typical wheel circumference is 1800mm (70 inches) for a car or
900mm (35 inches) for a kart
No speed reading. Speed reading erratic, value jumps high or low.
❑ Faulty sensor and/or wiring
Check the sensor indicator for correct operation.
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