4-48 FI SYSTEM DIAGNOSIS
Step 2
IAT 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 Y/R wire and B/Br wire of IAT sensor coupler and
ECM coupler: less than 1
– Between Y/R or B/Br wire and ground: infinity
– Between Y/R wire terminal and B/Br wire at IAT sensor
coupler: infinity
2
2
2
2
