Suzuki RM-Z250 Service Manual page 228

6) Measure the voltage between Dg wire terminal A and
ground.
7) If OK, then measure the voltage between Dg wire terminal A
and B/Br wire terminal B.
 IAT sensor input voltage: 4.5 – 5.5 V
 09900-25008: Multi circuit tester set
36890-28H00: Battery lead wire (option)
 Tester knob indication: Voltage ()
Is the voltage OK?
YES Go to Step 2.
• Loose or poor contacts on the ECM coupler
(terminal N or O).
NO
• Open or short circuit in the Dg wire or B/Br wire.
Step 1 (When indicating P0110-H:)
1) Stop the engine.
2) Remove the seat and fuel tank rubber band. (5-2, 13-2)
3) Check the IAT sensor 1 coupler for loose or poor contacts.
If OK, then check the IAT sensor lead wire continuity.
4) Remove the fuel tank. (13-2, -3)
5) Disconnect the IAT sensor coupler and ECM coupler.
(12-60)
6) Insert the needle-pointed probes to the lead wire coupler.
7) Check the continuity between Dg wire A and terminal O.
8) Also, check the continuity between B/Br wire B and terminal
N.
 IAT sensor lead wire continuity: Continuity ()
 09900-25008: Multi circuit tester set
09900-25009: Needle-pointed probe set
 Tester knob indication: Continuity test ()
Is the continuity OK?
YES Go to Step 2.
NO Dg wire or B/Br wire open.
(+ Dg – - Ground)
(+ Dg – - B/Br)
FI SYSTEM DIAGNOSIS 12-45
1
V
1
1
ECM coupler (Harness side)