If the fuel injection indicator displays "fi", showing signs of trouble in the fuel injection system, take your machine to an authorized suzuki dealer. Refer to the "instrument panel:' section for fuel injection system indicator explanation. If the indicator does not display "fi", make sure there is enough fuel in the fuel tank. If the indicator does not display "fi" and there is enough fuel, ignition system should be checked.
DTC “c23” (p1651-h/l): to sensor circuit
malfunction
Detected condition and possible cause
Detected condition
Possible cause
C23
The sensor voltage should be the
following for 2 sec. And more, after ignition
switch is turned on.
0.2 V ≤ Sensor voltage < 4.8 V
To sensor circuit open or shor ...
Special tools and equipment
Special tool
...
Continuity check
Measure resistance across coupler “b” (between “a”
and “c” in figure).
If no continuity is indicated (infinity or over limit), the
circuit is open between terminals “a” and “c”.
Disconnect the coupler “b” and measure resistance
between couplers “a” and “b-1”.
If no continuity ...