Dtc 9-2 (Iat Sensor High Voltage) - Honda CTX700N/ND Service Manual

PGM - FI SYSTEM
DTC 9
-
2 ( IAT SENSOR HIGH VOLTAGE )
NOTE :
• Before starting the inspection
,
check for loose or poor contact on the
IAT
sensor 2 P ( Black )
connector and
ECM/ PCM 33 P connector , then recheck the DTC
.
•
If the PCM is replaced , perform the Clutch Initialize Learning Procedure ( page 12
-
81 ) ( CTX 700 D /
ND )
.
1
. IAT Sensor System Inspection
Turn the ignition switch ON and engine stop switch "
o
"
.
Check the IAT sensor with the MCS .
Is about 5 V indicated ?
YES
-
GO TO STEP 2 .
NO
-
Intermittent failure
2
. IAT Sensor Inspection
Turn the ignition switch OFF
.
Disconnect the IAT sensor 2 P ( Black ) connector
( page 4
-
32 )
.
Connect the IAT sensor 2 P ( Black ) connector [ 1 ]
terminals at
the wire harness side with a jumper wire
[ 2 ] .
Connection : Gray / blue - Green/ yellow
Turn the ignition switch ON
.
Check the IAT sensor with the MCS
.
Is about 0 V indicated ?
YES
- Faulty IAT sensor
NO
-
GO TO STEP 3
.
1
Gr / Bu G/ Y
[ 2 ]
3
. IAT Sensor Line Open Circuit Inspection
Turn the ignition switch OFF .
Disconnect the following :
-
ECM 33 P ( Black ) connector ( page 4
-
34 )
( CTX 700 / A / N / NA )
-
PCM 33 P ( Gray) connector ( page 4
-
34 )
( CTX 700 D / ND )
Check for continuity between the ECM /PCM 33 P
connector [ 1 ] and IAT sensor 2 P ( Black ) connector
[ 2 ] of the wire
harness side
.
Connection : Gray / blue - Gray / blue
Green/ yellow - Green/ yellow
TOOL :
Test probe , 2 packs 07 ZAJ
-
RDJA 110
O
Gr / Bu
Gr / Bu
G/ Y
G / Y
Q
[ 2 ]
[ 1 ]
Is there continuity ?
YES
-
Replace the ECM/PCM with a known good one
,
and recheck
.
NO
-
• Open
circuit in the Gray / blue wire
• Open circuit in the Green/ yellow wire
4
-
90