FI SYSTEM DIAGNOSIS 4-43
Step 1
ECT sensor input voltage check
1) Turn the ignition switch OFF.
2) Remove the right fuel tank cover. (
8-5)
3) Disconnect the ECT sensor coupler
1
.
4) Check for proper terminal connection to the ECT sensor cou-
pler.
5) If connections are OK, turn the ignition switch ON.
6) Measure the input voltage between the B/Bl wire and ground.
7) If OK, measure the input voltage between the B/Bl wire and
B/Br wire.
09900-25008: Multi circuit tester set
Tester knob indication: Voltage (
)
ECT sensor input voltage:
4.5 – 5.5 V
(
+
terminal: B/Bl –
-
terminal: Ground)
(
+
terminal: B/Bl –
-
terminal: B/Br)
Is check result OK?
Step 2
ECT sensor circuit check
1) Turn the ignition switch OFF.
2) Remove the seat. (
8-5)
3) Disconnect the ECM couplers
1
.
4) Check for proper terminal connection to the ECM couplers.
5) If connections are OK, check the following points.
• Resistance
09900-25008: Multi circuit tester set
09900-25009: Needle-point probe set
Tester knob indication: Resistance (
)
– Between B/Bl wire and B/Br wire of ECT sensor coupler
and ECM coupler: less than 1
1
YES
Go to Step 3.
NO
Go to Step 2.
1
2
2
