C23" (P1651-H/L) To Sensor Circuit Malfunction - Suzuki GSX-R1000 2007 Service Manual

4-62 FI SYSTEM DIAGNOSIS

"C23" (P1651-H/L) TO SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
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
P1651 Sensor voltage is higher than specified
H
value.
Sensor voltage is lower than specified
L
value.
TO sensor
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.
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
If OK, then measure the TO sensor resistance.
4) Disconnect the TO sensor coupler.
• TO sensor circuit open or short
• TO sensor malfunction
• ECM malfunction
• TO sensor circuit shorted to VCC or ground circuit
open
• TO sensor circuit open or shorted to ground or
VCC circuit open
R
B
B/Br
for loose or poor contacts.
POSSIBLE CAUSE
ECM
VCC
TOS
E2
1