4-54 FI SYSTEM DIAGNOSIS
5) Measure the voltage between Dg wire terminal and
ground.
6) If OK, then measure the voltage between Dg wire terminal
and B/Br wire terminal .
IAT sensor input voltage: 4.5 – 5.5 V
( Dg – Ground)
( Dg – B/Br)
\ 09900-25008: Multi-circuit tester set
W Tester knob indication: Voltage ()
Is the voltage OK?
Step 1 (When indicating P0110-H:)
1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. (5-3)
3) Check the IAT sensor coupler for loose or poor contacts.
If OK, then check the IAT sensor lead wire continuity.
4) Disconnect the IAT sensor coupler and ECM coupler.
5) Check the continuity between Dg wire and terminal 8.
6) Also, check the continuity between B/Br wire and terminal
:.
IATS 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?
7) After repairing the trouble, clear the DTC using SDS tool.
(4-28)
1
V
YES Go to Step 2.
NO
• Loose or poor contacts on the ECM coupler
(terminal 8 or :)
• Open or short circuit in the Dg wire or B/Br wire
1
YES Go to Step 2.
NO Dg wire or B/Br wire open
ECM coupler (Harness side)
(Black)
(Gray)
1
?
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