Honda 2004 Odyssey Service Manual page 480

11. Turn the ignition switch OFF.
12. Inspect the ACGS (15A) fuse in the under-hood
fuse/relay box.
Is the f use OK ?
YES Go to step 13.
NO Check for these problems:
• A short in the wire between the ACGS (15A) fuse
and the PGM-FI main relay.
• A short in the wire between the PGM-FI main
relay and the PCM, injectors, or IAC valve.
13. Inspect the No. 1 FUEL PUMP (15A) fuse in the
under-dash fuse/relay box.
Is the f use OK ?
YES Go to step 14.
NO Check for these problems:
• A short in the wire between the No. 1 FUEL
PUMP (15A) fuse and the PGM-FI main relay.
• A short in the wire between the PGM-FI main
relay and the fuel pump.
• A faulty PGM-FI main relay or a faulty fuel pump.
14. Disconnect PCM connector A (31P) and E (31P).
15. Check for continuity between body ground and
PCM connector terminals A30, A31, and E6
individually.
PCM CONNECTORS
A (31P)
VCC3 (YEL/BLU)
E (31P)
Wire side of female terminals
Is there continuity?
YES Go to step 16.
NO Go to step 17.
VCC1
(YEL/
RED)
VCC2 (YEL/BLU)
16. Disconnect the 3P connector from each of these
sensors, one at a time, and check for continuity
between body ground and PCM connector
terminals A30, A31, and E6 individually.
• Manifold Absolute Pressure (MAP) sensor
• Exhaust Gas Recirculation (EGR) valve position
sensor
• Throttle Position (TP) sensor
• Fuel Tank Pressure (FTP) sensor
Is there continuity?
YES Repair short to body ground in the wire
between PCM (A31) and the MAP sensor, the PCM
(A30) and the TP sensor, or the EGR valve position
sensor, the PCM (E6), and the FTP sensor.
NO Replace the sensor that made continuity to
body ground go away when disconnected.
17. Disconnect the injectors and IAC valve connectors.
18. Turn the ignition switch ON (II).
19. Measure voltage between body ground and PCM
connector terminals A2 and A3 individually.
PCM CONNECTOR A (31P)
IGP2 (YEL/BLK) IGP1 (YEL/BLK)
Wire side of female terminals
Is there battery voltage?
YES Go to step 20.
NO Check for these problems:
• An open in the wire(s) between the PGM-FI main
relay and PCM connector terminals A2 and A3.
• Poor connections at the PGM-FI main relay.
• A faulty PGM-FI main relay (see page 11-209).
20. Reconnect the connectors to the sensors, then
reconnect PCM connectors A (31P) and E (31P).
(cont'd)
11-171