4) Disconnect the IAP sensor coupler.
5) Turn the ignition switch ON.
6) Insert the needle pointed probes to the lead wire coupler.
7) Measure the voltage at the R wire and ground.
8) If OK, then measure the voltage at the R wire and B/Br wire.
IAP sensor input voltage: 4.5 – 5.5 V
\ 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
W Tester knob indication: Voltage ()
Is the voltage OK?
YES
Go to Step 2.
• Loose or poor contacts on the ECM coupler
NO
(terminal
• Open or short circuit in the R wire or B/Br wire.
Step 1 (When indicating P0105-H:)
1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. (5-3)
3) Check the IAP sensor coupler
If OK, then check the IAP sensor lead wire continuity.
4) Disconnect the IAP sensor coupler.
5) Check the continuity between R wire
If the sound is not heard from the tester, the circuit condition
is OK.
(
R –
Ground)
(
R –
B/Br)
or
).
for loose or poor contacts.
and G/B wire
1
V
1
1
.
FI SYSTEM DIAGNOSIS 4-41