Honda 2004 Odyssey Service Manual page 500

14. Check for continuity between body ground and
PCM connector terminal E21.
PCM CONNECTOR E (31P)
Wire side of female terminals
Is there continuity?
YES Repair short in the wire between the PCM
(E21) and the A/C pressure switch.
NO Substitute a known-good PCM and recheck
(see page 11-5). If the prescribed voltage is now
available, replace the original PCM. If not, check the
A/C system for other symptoms.
15. Momentarily connect under-hood fuse/relay box
16P connector terminal No. 11 to body ground with
a jumper wire several times.
NOTE: The under-hood fuse/relay box 16P
connector is on the bottom of the fuse box. When
you unbolt and invert the fuse box, leave the upper
cover on to prevent short circuits.
UNDER-HOOD FUSE/RELAY BOX
CONNECTOR D (16P)
ACC (RED)
Wire side of female terminals
Is there a clicking noise f rom the A/ C compressor
clutch?
YES Repair open in the wire between the PCM
(E12) and the A/C clutch relay.
NO Check the A/C system for other symptoms.
ACS
(BLU/RED)
JUMPER WIRE
16. Measure voltage between PCM connector
terminals A26 and E21.
PCM CONNECTORS
A (31P)
LG1 (BRN/BLK)
E (31P)
Wire side of female terminals
Is there less than 1.0 V ?
YES Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM. If not, check the
A/C system for other symptoms.
NO Repair open in the wire between the PCM
(E21) and the A/C pressure switch.
ACS
(BLU/RED)
11-191