Dtc P0108: Map Sensor Circuit High Voltage - Honda EP3 Service Manual

DTC P0108: MAP Sensor Circuit High Voltage
'1.
Start the engine. Hold the engine at 3,000 rpm with
no load (in neutral) until the radiator fan comes on,
then let it idle.
2. Check the MAP with the scan tool.
le about 101 kPa (780 nmHg, 30 in.Hg) ot highet,
or about 2.9 V or higher indicated?
YES Go to step 3.
NO-lntermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the MAP sensor and at the ECM.I
3. Turn the ignition switch OFF.
4. Disconnectthe MAP sensor 3P connector.
5, Connect MAP sensor 3P connector terminals No. 2
and No. 3 with a jumper wire.
MAP S€NSOR 3P CONNECTOR
MAP
{GRN/REO}
SG1 (GRN/WHTI
JUMPER WIRE
Wire side of female terminals
6. Turn the ignition switch ON (ll).
7. Check the MAP with the scan tool.
ls about 101 kPa (760 mmHg,30 in.Hg) ot higher,
or about 2.9 V or higher indicated?
YES-Go to step 8.
NO Replace the MAP sensor.I
8 . R e m o v e t h e j u m p e r w i r e .
1 2 3
9. Measure voltage between MAP sensor 3P
connector terminals No. 1 and No. 3.
MAP SENSOR 3PCONNECTOF
vccl
{ Y E L / R E D )
l , l o c l
l . l . r l
I lsct
d) l{GRN/wHrr
Y I
i l
l l
W i r e s i d e o f f e m a l e l e r m i n a l s
ls there about 5 V?
YES Go to step 10.
NO Repair open in the wire between the ECM
(A1 1 ) and the MAP sensor.I
Turn the ignition switch OFF.
C o n n e c t E C M c o n n e c t o r t e r m i n a l s A 1 1 a n d A 1 9
with a jumper wire.
ECM CONNECTOR A {31PI
W i r e s i d e o f f e m a e t e . m i n a l s
T u r n t h e i g n i t i o n s w i t c h O N ( l l ) .
Check the MAP with the scan tool.
ls about 101 kPa (760 mmHg, 30 in.Hg) or higher,
or about 2.9 V ot higher indicated?
YES Update the ECM if it does not have the lalest
software, or substitute a known-good ECM, lhen
recheck (see page 1 1-6). lf the symptom/indication
goes away with a known good ECM, replace the
o r i g i n a l E C M . I
NO-Repair open in the wire betlveen the ECI\il
( A 1 9 ) a n d t h e M A P s e n s o r . I
1 0 .
1 1 .
J U M P E R W I A E
1 1 - 5 3