Honda 2004 Odyssey Service Manual page 1804

4. With the driver's multiplex control unit still disconnected, make these input tests at the fuse/relay box socket.
• If any test indicates a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, go to step 5.
Cavity Wire Test condition
A12 Fuse/ Under all
relay conditions
box
socket
A24 Ignition switch
ON (II)
5. Reconnect the driver's multiplex control unit to the fuse/relay box, and perform the following input tests at the
appropriate connectors on the back of the fuse/relay box (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, go to step 6.
Cavity Wire Test condition
A3 GRN/ Driver's door
ORN open
Driver's door
closed
B16 RED/ Combination
GRN light switch
ON
B13 RED/ Passing switch
WHT ON
O9 BLU/ Ignition key is
WHT in the ignition
switch
Ignition key is
out of the
ignition switch
Q6 BLU/ Combination
WHT light switch
ON
Q7 RED/ Combination
YEL light switch
ON
: Multiplex connector B
Test: Desired result
Check for voltage to ground:
There should be battery voltage.
Check for voltage to ground:
There should be battery voltage.
Test: Desired result
Check for voltage to ground:
There should be 1 V or less.
Check for voltage to ground:
There should be 5 V or more.
Check for voltage to ground:
There should be about 12 V.
Check for voltage to ground:
There should be 1 V or less.
Check for voltage to ground:
There should be 1 V or less.
Check for voltage to ground:
There should be 5 V or more.
Check for voltage to ground:
There should be about 12 V.
Check for voltage to ground:
There should be 1 V or less.
Possible cause if result is not obtained
• Blown No. 13 (7.5A) fuse in the
passenger's under-dash fuse/relay
box
• An open in the wire
• Blown No. 9 (10A) fuse in the driver's
under-dash fuse/relay box
• Faulty driver's under-dash fuse/relay
box
Possible cause if result is not obtained
• Faulty driver's door switch
• An open in the wire
• Faulty driver's door switch
• A short to ground
• Poor ground (G401)
• Faulty combination light switch
• Faulty driver's multiplex control unit
• Poor ground (G401)
• Faulty combination light switch
• An open in the wire
• Poor ground (G401)
• Faulty ignition switch
• An open in the wire
• Poor connection
• Short to ground
• Faulty driver's multiplex control unit
• Poor ground (G401)
• Faulty combination light switch
• Faulty driver's side fuse box or driver's
multiplex control unit
• An open in the wire
• Poor ground (G401)
• Faulty combination light switch
• An open in the wire
(cont'd)
22-125