Suzuki GSX-R1000 2007, Service Manual

Page: 217 / 549

4-62 FI SYSTEM DIAGNOSIS
“C23” (P1651-H/L) TO SENSOR CIRCUIT MALFUNCTION
INSPECTION
Step 1 (When indicating C23:)
1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. (
5-3)
3) Check the TO sensor coupler for loose or poor contacts.
If OK, then measure the TO sensor resistance.
4) Disconnect the TO sensor coupler.
DETECTED CONDITION POSSIBLE CAUSE
C23 The sensor voltage should be the follow-
ing 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
H
Sensor voltage is higher than specified
value. • TO sensor circuit shorted to VCC or ground circuit
open
• TO sensor circuit open or shorted to ground or
VCC circuit open
L
Sensor voltage is lower than specified
value.
ECM
E2
TOS
R
B/Br
VCC
TO sensor
B
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.
1