Honda 2004 Odyssey Service Manual page 409

PGM-FI System
DTC Troubleshooting (cont'd)
DTC P0108 '02-04 Models:
Circuit High Voltage
1. Start the engine. Hold the engine at 3,000 rpm with
no load (in Park or neutral) until the radiator fan
comes on, then let it idle.
2. Check the MAP with the scan tool or the HDS.
Is more than 101 kPa ( 7 80 mmHg, 30 in.Hg), or
more than 2.9 V indicated?
YES Go to step 3.
NO Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the MAP sensor and the PCM.
3. Turn the ignition switch OFF.
4. Disconnect the MAP sensor 3P connector.
5. Install a jumper wire between MAP sensor 3P
connector terminals No. 2 and No. 3.
MAP SENSOR 3P CONNECTOR
MAP (GRN/RED)
Wire side of female terminals
6. Turn the ignition switch ON (II).
7. Check the MAP with the scan tool or the HDS.
Is more than 101 kPa ( 7 60 mmHg, 30 in.Hg), or
more than 2.9 V indicated?
YES Go to step 8.
NO Replace the MAP sensor.
8. Remove the jumper wire.
11-100
MAP Sensor
SG1 (GRN/WHT)
JUMPER WIRE
9. Measure voltage between MAP sensor 3P
connector terminals No. 1 and No. 3.
MAP SENSOR 3P CONNECTOR
VCC1
(YEL/RED)
Wire side of female terminals
Is there about 5 V ?
YES Go to step 10.
NO Repair open in the wire between the PCM (C7)
and the MAP sensor.
10. Turn the ignition switch OFF.
11. Connect PCM connector terminals C7 and C17 with
a jumper wire.
PCM CONNECTOR C (31P)
SG1 (GRN/WHT)
MAP (GRN/RED)
Wire side of female terminals
12. Turn the ignition switch ON (II).
13. Check the MAP with the scan tool or the HDS.
Is more than 101 kPa ( 7 60 mmHg, 30 in.Hg), or
more than 2.9 V indicated?
YES Substitute a known-good PCM and recheck
(see page 11-5). If normal MAP readings are
indicated, replace the original PCM.
NO Repair open in the wire between the PCM
(C17) and the MAP sensor.
SG1
(GRN/WHT)
JUMPER WIRE