4-52 FI SYSTEM DIAGNOSIS
Step 3
TO sensor signal 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 Br wire of TO sensor coupler and ECM coupler:
less than 1
– Between Br wire and ground: infinity
– Between Br wire terminal and other terminal at TO sensor
connector: infinity
• Voltage
09900-25008: Multi circuit tester set
Tester knob indication: Voltage (
)
– Between Br wire and ground: approx. 0 V (When ignition
switch is ON)
Is check result OK?
3
3
3
3
YES
Go to Step 4.
NO
Repair or replace the defective wire.
3
