Suzuki RM-Z450 - 23 to Sensor Circuit Malfunction

FI SYSTEM DIAGNOSIS 12-36
“23” TO SENSOR CIRCUIT MALFUNCTION
INSPECTION
Step 1
1) Stop the engine.
2) Remove the fuel tank. ("13-2)
3) Check the TO sensor coupler for loose or poor contacts.
If OK, then measure the TO sensor resistance.
4) Remove the TO sensor.
5) Measure the resistance between terminal

A and terminal

B.
# TO sensor resistance: 16.5 – 22.3 kΩ
(Terminal

A – Terminal

B)
! 09900-25008: Multi-circuit tester set
$ Tester knob indication: Resistance (Ω)
Is the resistance OK?
DETECTED CONDITION POSSIBLE CAUSE
The sensor voltage should be the following for 5 sec.
and more.
0.2 V Sensor voltage < 4.6 V
• TO sensor circuit open or short.
• TO sensor malfunction.
• ECM malfunction.
ECM
E2
TOS
R/Bl
B/Br
VCC
TO sensor
Br/W
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.
1
YES Go to Step 2.
NO Replace the TO sensor with a new one.
1