Honda NSA700A DN-1 2009, Service Manual

Page: 148 / 654

FUEL SYSTEM (PGM-FI)
DTC 9-2 (IAT SENSOR HIGH VOLTAGE)
• Before starting the inspection, check fo r loose or
poor contact on the IAT sensor connecto r and
recheck the DTC.
1. IAT Sensor System Inspection
Turn the ig n itio n sw itch ON and engine stop
sw itch " O
Check the IAT sensor w ith the HDS pocket tester.
Is a b o u t 5 V in d ic a te d ?
YES - G O TO STEP 2.
NO - • In te rm itte n t fa ilu re
• Loose or p o o r contact on the IAT
sensor connector
2. IAT Sensor Inspection
Turn the ign tio n sw itch OFF.
Remove the center cow l (page 3-6).
Disconnect the IAT sensor 2P (Gray) connecto-.
Connect the IAT sensor te rm in a ls w ith a ju m p e r
w ire.
Connection: Gray/blue - Green/orange
Turn the ig n itio n sw itch ON and engine stop
sw itch " Q ".
Check the IAT sensor w ith the HDS pocket tester.
Is a b o u t 0 V ind ica te d ?
YES - Faulty IAT sensor
NO - G O TO STEP 3.
3. IAT Sensor Output Line Inspection
Disconnect the ECM 33P connectors.
Check fo r co n tin u ity at the G ray/blue and Green/
orange w ire between the IAT sensor 2P (Gray)
connector te rm in a ls and the ECM 33P connec­
tors.
CONNECTION: B29 - Gray/blue
A18 - Green/orange
TOOL:
Test probe
07ZAJ-RDJA110
Is there co n tin u ity ?
YES - Replace the ECM w ith a know n good
one, and recheck.
NO - • Open c ircu it in G ray/blue w ire
• Open c ircu it in G reen/orange w ire
IAT SENSOR 2P
(GRAY) CONNECTOR
(W ire side o f fem ale
te rm in a l)
ECM 33P (LIGHT
GRAY)
CONNECTOR (W ire
side o f fem ale
term inal)
Gr/Bu
)
;
\
r
I
\
ECM 33P (BLACK) CONNECTOR
(W ire side o f fem ale te rm in a l)