Honda 2004 Odyssey Service Manual page 1790

5. Reconnect the driver's multiplex control unit to the driver's under-dash fuse/relay box, and perform the following
input tests at the appropriate connectors on the back of the driver's under-dash fuse/relay box.
For driver's under-dash fuse/relay box connector socket location (see page 22-76).
• If any test indicates a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, the driver's multiplex control unit must be faulty, replace it.
Cavity Wire
A16 Fuse/relay
box socket
A18
A13
B5 WHT/BLU
A6 Fuse/relay
box socket
Test condition Test: Desired result
Driver's door Check for voltage to ground:
open There should be 1 V or less.
Driver's door Check for voltage to ground:
closed There should be 5 V or more.
Ignition switch Check for voltage to ground:
ON (II), driver's There should be 1 V or less.
seat belt
unbuckled
Ignition switch Check for voltage to ground:
ON (II), driver's There should be 5 V or more.
seat belt buckled
Ignition key is in Check for voltage to ground:
the ignition There should be 1 V or less.
switch
Ignition key is Check for voltage to ground:
out of the There should be 5 V or more.
ignition switch
Engine running Check for voltage to ground:
There should be battery voltage.
Combination Check for voltage to ground:
light switch ON There should be battery voltage.
Jump battery
voltage to B16
(RED/GRN) on
automatic lights
off feature only.
Possible cause if result is not obtained
• Faulty driver's door switch
• An open in the wire
• Faulty driver's door switch
• Short to ground
• Faulty driver's seat belt switch
• Poor ground (G551)
• An open in the wire
• Faulty driver's seat belt switch
• Short to ground
• Faulty ignition switch
• Poor ground (G401)
• An open in the wire
• Faulty ignition switch
• Short to ground
• Faulty charging system
An open in the wire
•
• Short to ground
• Blown No. 10 (15A) fuse in the
passenger's under-dash fuse/
relay box
• Faulty combination light switch
• Faulty driver's under-dash fuse/
relay box
• An open in the wire
22-111