Suzuki GSF650 Service Manual

1A-69 Engine General Information and Diagnosis:
DTC “C23” (P1651-H/L): TO Sensor Circuit Malfunction
B817H21104016
Detected Condition and Possible Cause
Wiring Diagram
ECM coupler (Harness side)
Troubleshooting
CAUTION
!
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with a
needle pointed tester probe to prevent the terminal damage or terminal bend.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to “Use of SDS Diagnosis Reset
Procedures (Page 1A-15)”.
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 short.
• TO sensor malfunction.
• ECM malfunction.
P1651
P1651
H
Sensor voltage is higher than specified
value.
• TO sensor circuit shorted to Vcc or ground circuit open.
L
Sensor voltage is lower than specified
value.
• TO sensor circuit open or shorted to ground or Vcc
circuit open.
B/Br
R
B
ECM
Vcc
E2
TO sensor
TOS
11
22
29
I718H1110066-02
I718H1110240-01

Suzuki GSF650 Specifications

General

Displacement	656 cc
Bore x Stroke	65.5 mm x 48.7 mm
Compression Ratio	11.5:1
Fuel System	Fuel injection
Ignition	Electronic ignition (transistorized)
Starter	Electric
Transmission	6-speed, constant mesh
Final Drive	Chain
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Front Tire	120/70ZR17M/C (58W), tubeless
Rear Tire	160/60ZR17M/C (69W), tubeless
Overall Length	2, 130 mm
Rear Brakes	Disc brake
Fuel Tank Capacity	19.0 L
Wheelbase	1, 470 mm
Seat Height	790 mm
Ground Clearance	135 mm
Engine Type	4-stroke, liquid-cooled, DOHC, 4-cylinder