Honda 2004 Odyssey Service Manual page 1789

Lights-on, Key-in, Seat Belt Reminder, Key Light
Timer, and Engine Oil Pressure Indicator Systems
Control Unit Input Test
1. Before testing these systems, troubleshoot the multiplex control system (see page 22-244).
Driver's Multiplex Control Unit
2. Remove the driver's unit from the driver's under-dash fuse/relay box.
3. Inspect the connector and socket terminals to be sure they are all making good contact.
• If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
• If the terminals look OK, go to step 4.
DRIVER'S UNDER-DASH FUSE/RELAY BOX SOCKET
(Driver's multiplex control unit connector A)
4. With the driver's multiplex control unit still disconnected, make these input tests at the connector and driver's
under-dash fuse/relay box sockets.
• 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
A24 Fuse/relay
box socket
A12
A1
B11 BLK
B17 YEL/RED
22-110
Test condition Test: Desired result
Ignition switch Check for voltage to ground:
ON (II) There should be battery voltage.
Under all Check for voltage to ground:
conditions There should be battery voltage.
Under all Attach to ground:
conditions The ignition key light should
come on.
Under all Check for continuity to ground:
conditions There should be continuity.
Ignition switch Check for continuity to ground:
OFF There should be continuity.
Ignition switch Check the low engine oil
ON (II) pressure indicator light
operation:
The indicator should come on.
Start the Check for voltage to ground:
engine There should be battery voltage.
DRIVER'S MULTIPLEX CONTROL UNIT CONNECTOR B
WHT/BLU
YEL/RED
BLK
RED/GRN
Wire side of female terminals
Possible cause if result is not obtained
• Blown No. 9 (10A) fuse in the
driver's under-dash fuse/relay box
• Faulty driver's fuse/relay box
• Blown No. 13 (7.5A) fuse in the
passenger's under-dash fuse/
relay box
• An open in the wire
• Blown No. 47 (20A) fuse in the
under-hood fuse/relay box
• An open in the wire
• Poor ground (G501)
• An open in the wire
• Faulty engine oil pressure switch
• An open in the wire
• Faulty LED
• An open in the wire
• Insufficient oil
• Improper lubrication
• Faulty engine oil pressure switch
• An open in the wire
• A short in the wire