C23" (P1651-H/L) To Sensor Circuit Malfunction - Suzuki VZR1800 2007 Service Manual

5-54 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.
P1651
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
INSPECTION
Step 1 (When indicating C23:)
1) Turn the ignition switch OFF.
2) Remove the fuel tank. (#6-3)
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.
5) Measure the resistance between terminal A and terminal C.
$ TO sensor resistance: 16.5 – 22.3 kΩ
! 09900-25008: Multi-circuit tester set
% Tester knob indication: Resistance (Ω)
Is the resistance OK?
YES Go to Step 2.
NO Replace the TO sensor with a new one.
R
B
B/Br
(Terminal A – Terminal C)
POSSIBLE CAUSE
• 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
1
1
ECM
VCC
TOS
E2