Honda 2004 Odyssey Service Manual page 503

Idle Control System
Alternator FR Signal Circuit Troubleshooting (cont'd)
11. Connect alternator 4P connector terminal No. 4 to
body ground with a jumper wire.
ALTERNATOR 4P CONNECTOR
Wire side of female terminals
12. Check for continuity between body ground and
PCM connector terminal A19.
PCM CONNECTOR A (31P)
Wire side of female terminals
Is there continuity?
YES Test the alternator
(see step 1 on page 4-24).
NO Repair open in the wire between the PCM
(A19) and the alternator.
13. Turn the ignition switch OFF.
14. Disconnect PCM connector A (31P).
11-194
ALTF (WHT/RED)
JUMPER WIRE
ALTF (WHT/RED)
15. Check for continuity between body ground and
PCM connector terminal A19.
PCM CONNECTOR A (31P)
Wire side of female terminals
Is there continuity?
YES Repair short in the wire between the PCM
(A19) and the alternator.
NO Substitute a known-good PCM and recheck
(see page 11-5). If the prescribed voltage is now
available, replace the original PCM.
ALTF (WHT/RED)