Honda 2004 Odyssey Service Manual page 1931

Multiplex Control System
Multiplex Control Unit Input Test (cont'd)
6. Make the following input tests at the connector B and fuse/relay box socket.
• If any test indicate a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, go to step 7.
Cavity Wire
B11 BLK
A12 Fuse/relay
box socket
A14
A24
A13
A1
A15
22-252
Test condition
Under all Check for continuity to ground:
conditions There should be continuity.
Under all Check for voltage to ground:
conditions There should be battery voltage.
Under all Check for continuity to ground:
conditions There should be continuity.
Ignition switch Check for voltage to ground:
ON (II) There should be battery voltage.
Ignition key is Check for continuity to ground:
inserted into the There should be continuity.
ignition switch
Ignition key Check for continuity to ground:
removed from There should be no continuity.
the ignition
switch
Under all Attach to ground:
conditions Ignition key light should come
on.
Short the Check for continuity to ground:
multiplex control There should be continuity.
inspection
connector
terminals with
the special tool
Remove the Check for continuity to ground:
special tool from There should be no continuity.
the multiplex
control
inspection
connector
Test: Desired result Possible cause if result is not obtained
• Poor ground (G501)
• An open in the wire
• Blown No. 13 (7.5A) fuse in the
passenger's under-dash fuse/
relay box
• Blown No. 54 (40A) fuse in the
under-hood fuse/relay box
• An open in the wire
• Poor ground (G401)
• An open in the wire
• Blown No. 9 (10A) fuse in the
driver's under-dash fuse/relay
box
• An open in the wire
• Faulty ignition key switch
• An open in the wire
• Poor ground (G401)
• Faulty ignition key switch
• Short to ground
• Blown No. 47 (20A) fuse in the
under-hood fuse/relay box
• Blown LED
• An open in the wire
• Poor ground (G401)
• Faulty driver's fuse/relay box
• An open in the wire
• Short to ground