C15" (P0115-H/L) Ect Sensor Circuit Malfunction - Suzuki VZ800 Service Manual

5-42 FI SYSTEM

"C15" (P0115-H/L) ECT SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
C15 Output voltage is not within the following
range.
0.1 Sensor voltage < 4.6 V
P0115 Sensor voltage is higher than specified
H
value.
Sensor voltage is lower than specified
L
value.
INSPECTION
Step 1 (When indicating C15:)
1) Remove the fuel tank. (6-3)
2) Turn the ignition switch OFF.
3) Check the ECT sensor coupler for loose or poor contacts.
If OK, then measure the ECT sensor voltage at the wire side
coupler.
4) Disconnect the ECT sensor coupler and turn the ignition
switch ON.
5) Measure the voltage between B/Bl wire terminal 1 and
ground.
6) Also, measure the voltage between B/Bl wire terminal 1 and
B/Br wire terminal 2.
 ECT sensor input voltage: 4.5 – 5.5 V
 09900-25008: Multi-circuit tester set
 Tester knob indication: Voltage ()
Is the voltage OK?
YES Go to Step 2.
• Loose or poor contacts on the ECM coupler
(terminal D or I)
NO
• Open or short circuit in the B/Bl wire or B/Br
wire
ECT sensor
(+ B/Bl – - Ground)
(+ B/Bl – - B/Br)
POSSIBLE CAUSE
• ECT sensor circuit open or short
• ECT sensor malfunction
• ECM malfunction
• ECT sensor circuit open or ground circuit open
• ECT sensor circuit shorted to ground
ECT
B/BI
B/Br E2
1
1
ECM