Honda 2004 Odyssey Service Manual page 474

DTC P0607: PCM Back Up Circuit Malfunction
1. Reset the PCM (see page 11-4).
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II).
Is DT C P0607 indicated?
YES Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
NO Go to step 4.
4. Cycle the ignition switch OFF and ON (II) five times.
5. Check for a DTC or a Temporary DTC with the scan
tool or the HDS.
Is DT C P0607 indicated?
YES Inspect the No. 13 CLOCK BACK UP (7.5A)
fuse in the passenger's under-dash fuse/relay box.
If the fuse is OK, repair an open in the wire between
the PCM (A1) and passenger's under-dash fuse/
relay box.
NO Intermittent failure, system is OK at this time.
A low battery can cause this problem. Ask the
customer if the engine had to be jump-started
recently.
DTC P1607: PCM Internal Circuit Malfunction
1. Reset the PCM (see page 11-4).
2. Turn the ignition switch ON (II).
3. Wait 30 seconds.
Is DT C P1607 indicated?
YES Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
NO Go to step 4.
4. Turn the ignition switch OFF.
5. Turn the ignition switch ON (II).
6. Wait 10 seconds.
Is DT C P1607 indicated?
YES Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
NO Intermittent failure, system is OK at this time.
A low battery can cause this problem. Ask the
customer if the engine had to be jump-started
recently.
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