C23" (P1651-H/L) To Sensor Circuit Malfunction - Suzuki VZ800 Service Manual

5-52 FI SYSTEM

"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 Sensor voltage < 4.6 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) Remove the right frame cover. (8-4)
2) Turn the ignition switch OFF.
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: 19.1 – 19.7 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
Br/W
B/Br
(Terminal A – Terminal C)
POSSIBLE CAUSE
• TO sensor circuit open or short
• TO sensor malfunction
• ECM malfunction
• TO sensor circuit open or shorted to VCC or
ground circuit open
• TO sensor circuit shorted to ground or VCC circuit
open
1
1
ECM
VCC
TOS
E2