Dtc 1-2 (Map Sensor High Voltage) - Honda MUV700 big red Service Manual

FUEL SYSTEM (PGM-FI)
6-16
5. MAP Sensor Inspection
Replace the sensor unit (MAP sensor) with a
known good one (page 6-51).
Erase the DIe (page 6· 1 2).
Turn the ignition switch to ON (I).
Check the MAP sensor with the HDS pocket
tester.
Is DTe 7-1 indicated?
YES - Replace the PCM with a known good
one and recheck.
NO - Faulty original sensor unit (MAP sen-
sor),
DTC 1-2 (MAP SENSOR HIGH
VOLTAGE)
• Before starting the troubleshooting, check the
sensor unit
5P
black connector for loose or poor
contacts, and recheck the
Ole.
1. MAP Sensor System Inspection 1
Turn the ignition switch to ON (I).
Check the MAP sensor wi th the HDS pockel
tester.
Is about 5 V indicated?
YES - GO TO STEP 2.
NO _ . Intermittent failure .
• l oose or poor contact on the sensor
unit
SP
black connector.
2. MAP Sensor System Inspection 2
Turn the ignition switch 10 OFF (0).
Disconnect the sensor unit 5P bl ack connector.
Connect the wire harness side 5P black connec-
tor terminals with a jumper wire.
Connection: Light green/ yeUow - Green/ black
Turn Ihe ignition switch 10 ON
(I).
Check the MAP sensor with the HDS pocket
tester.
Is about 0 V indicated?
YES - Faulty sensor unit (MAP sensor).
NO - GO TO STEP 3.
3. MAP Sensor Input Voltage Inspection
Turn the ignition swilch to OFF
(0).
Remove the jumper wire.
Turn the ignition switch to ON (I).
Measure the vollage between the wire harness
side 5P connector terminals.
Connection: Brown/g reen (+)
-
Green / black
H
Is the voltage within
4.75 -
5.2SV?
YES - GO TO STEP 4.
NO - Open circuit in the Green/black wire.
SENSOR UNIT 5P BLACK CONN ECTOR
(Terminal side of the wire harness)
Green/black light greenlyeUow
JUMPER WIRE
SENSOR UNIT 5P BLACK CONNECTOR
(Terminal side of the wi re harness)
Green/black