Engine General Information and Diagnosis: 1A-28
2 1) Connect the IAP sensor coupler.
2) Insert the needle pointed probes to the lead wire coupler.
3) Start the engine at idle speed.
4) Measure the IAP sensor output voltage at the wire side
coupler (between G/B and B/Br wires).
IAP sensor output voltage
Approx. 1.5 – 3.5 V at idle speed
(Positive terminal: G/B – Negative terminal: B/Br)
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Voltage ( )
Is the voltage OK?
Go to Step 3. • Open or short circuit
in the G/B wire.
• If the wire is OK,
replace the IAP
sensor with a new
one.
Step Action Yes No
V
(A)
(B)
I705H1110036-05
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