Honda 2004 Odyssey Service Manual page 1916

• If the proper key has been used, the immobilizer indicator light will come on for about 2 seconds, then go off.
• If the wrong key has been used or the code was not received or recognized by the PCM, the indicator light will come
on for about 2 seconds, then it will blink until the ignition switch is turned OFF. For accurate immobilizer system
diagnosis get as much information from the customer as possible. A blinking indicator light means the key was not
recognized.
• If the ignition switch is turned OFF, the indicator will blink for about 5 seconds to signal that the immobilizer system
has been set correctly, then the indicator will go off.
NOTE:
• Large metal objects, key fobs, other immobilizer keys, and other transpondars can interfere with the immobilizer
signal. If an intermittent program is suspected, remove the ignition key from the key ring.
• '03-04 models use sidewinder keys that are ''F'' type.
Problem
Master or valet key has been lost or additional
master or valet key is required.
All master and valet keys have been lost.
Immobilizer receiver unit does not work.
PCM does not work.
Ignition switch does not work.
Door key cylinder is broken.
Part set
Blank key
Blank key x 2, or 3
Immobilizer receiver unit
PCM
Ignition switch, Master keys, and valet key
(rekey all lock cylinders to the new keys)
Door key cylinder (rekey the cylinder)
PGM-Tester
required ?
YES
YES
NO
YES
YES
NO
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