Suzuki GSX-R600 Manual page 97

Malfunction
Detected Item
Code
C91
Vehicle speed sensor
P0500
C93
Steering damper
solenoid valve
H
P1769
L
* : Immobilizer system equipped model only. (E-02, 19, 24)
Engine General Information and Diagnosis:
Detected Failure Condition
Speedometer does not receive signal from the
vehicle speed sensor for more than 6 sec.
when the motorcycle is running.
ECM does not receive signal from the vehicle
speed sensor for more than 6 sec. when the
motorcycle is running.
Failure in communication between ECM and
speedometer with reference to vehicle speed.
Steering damper control current does not flow
to the solenoid valve.
With IG turned ON, ECM detects a failure of
internal circuit element. Solenoid current does
not converge to the target value. Battery
voltage is 10 V or below with the engine
running.
Steering damper control current is higher than
specified value.
An abnormal current is detected during the
vehicle standstill. Solenoid current is 0.7 A or
above.
Steering damper control current is lower than
specified value.
With IG turned ON, ECM detects a
discontinuity. An abnormal current is detected
during the vehicle standstill.
Check For
Speed sensor and
speedometer wiring/coupler
connection between ECM and
speedometer
Steering damper solenoid valve
circuit interrupter element
shorted, feedback current
convergence failure, low
battery voltage
Steering damper solenoid valve
circuit shorted to VCC
Steering damper solenoid valve
circuit open or shorted
1A-29