C15" Ect Sensor Circuit Malfunction - Suzuki DL650 Service Manual

Fl SYSTEM DIAGNOSIS 4-31
"C15" ECT SENSOR CIRCUIT MALFUNCTION
DETECTED CONDITION POSSIBLE CAUSE
I
1
Output voltage is out of the specified range.
I
ECT sensor circuit open or short.
I
INSPECTION
Step 1
1) Turn the ignition switch OFF.
2) Check the ECT sensor coupler for loose or poor contacts.
If OK, then measure the ECT sensor voltage at the wire side
coupler.
3) Disconnect the coupler and turn the ignition switch ON.
0.1 V
S
Sensor voltage c 4.6 V
4) Measure the voltage between BIB1 wire terminal
@
and
ground.
5) If OK, then measure the voltage between BIB1 wire terminal
@
and B/Br wire terminal
a.
ETC sensor voltage: 4.5
-
5.5 V
(@ BIB1
-
@
Ground)
(@
BIB1
-
@
BIB r)
09900-25008: Multi circuit tester set
?m
Tester knob indication: Voltage (-)
ECT sensor malfunction.
ECM malfunction.
Is the voltage OK?
YES
NO
Go to Step 2
Loose or poor contacts on the ECM coupler.
Open or short circuit in the BIB1 wire or B/Br
wire.