Dtc 1-2 (Map Sensor High Voltage) - Honda CTX700N/ND Service Manual

PGM - FI SYSTEM
DTC 1
-
2 ( MAP SENSOR HIGH VOLTAGE )
NOTE :
If the PCM is replaced
,
perform the Clutch Initialize Learning Procedure ( page 12
-
81 ) ( CTX 700 D / ND )
.
1
.
MAP Sensor System Inspection 1
Turn the ignition switch ON and engine stop switch "
o
"
.
Check the MAP sensor with the MCS
.
Is about 5 V indicated ?
YES
-
GO TO STEP 2 .
NO
-
• Intermittent failure
•
Loose or poor contact on the sensor unit 5 P ( Black ) connector
2 . Sensor
Unit Power Line Inspection
Check
the sensor
unit power line inspection ( page 4
-
11 ) .
Is the sensor unit power line normal ?
YES
-
GO TO STEP 3 .
NO
-
Replace or repair the abnormal circuit
,
3 . MAP Sensor System Inspection 2
Turn the ignition switch OFF .
Disconnect the sensor unit
5 P ( Black ) connector
( page 7
-
14 )
.
Connect the sensor unit 5 P ( Black ) connector [ 1 ]
terminals at the wire harness side with a jumper wire
[ 2 ]
.
Connection : Violet / red
-
Green/ yellow
Turn the ignition switch ON .
Check the MAP sensor with
the MCS
.
Is about 0 V indicated ?
YES
-
Faulty sensor unit ( MAP sensor )
NO
-
GO TO STEP 4 .
4
.
MAP Sensor Output Line Open Circuit Inspection
Turn the ignition switch OFF
.
Remove the jumper wire
.
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 sensor unit 5 P ( Black )
connector
[ 2 ] of the wire harness side .
Connection : Violet / red
-
Violet
/
red
TOOL :
Test probe
,
2 packs
07 ZAJ - RDJA 110
Is there continuity ?
YES
-
Replace the ECM / PCM with a known good one
, and recheck .
NO
-
Open circuit in the Violet / red wire
V / R
V / R
Q
[ 2 ]
[ 1 ]
[
2
]
G / Y
V / R
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