How To Set Readiness Codes - Honda 2004 Odyssey Service Manual

How to Set Readiness Codes

Malfunction Indicator Lamp (MIL) Indication
(In Relation to Readiness Codes)
The vehicle has certain ''readiness codes'' that are part
of the on-board diagnostics for the emissions systems.
If the vehicle's battery has been disconnected or gone
dead, if the DTCs have been cleared, or if the PCM has
been reset, these codes are reset. In some states, part
of the emissions testing is to make sure these codes are
set to complete. If all of them are not set to complete,
the vehicle may fail the emission test, or the test cannot
be finished.
'99-00 models
To see if the readiness codes are set to complete,
connect a scan tool to the vehicle's data link connector
(DLC), and check the readiness code list in the generic
OBD II mode.
'01-04 models
To see if the readiness codes are set to complete, turn
the ignition switch ON (II), but do not start the engine.
The MIL will come on for 15 20 seconds. If it then goes
off, the readiness codes are set to complete. If it blinks
five times, one or more readiness codes are not set to
complete. To set readiness codes from incomplete to
complete, do the procedure for the appropriate code.
Catalytic Converter Monitor and Readiness
Code
NOTE:
• Do not turn the ignition switch OFF during the
procedure.
• All readiness codes are cleared when the battery is
disconnected or when the PCM is cleared with the
OBD II scan tool or HDS.
• Low ambient temperature or excessive stop-and-go
traffic may increase the drive time needed to switch
the readiness code from incomplete to complete.
• The readiness code will not switch to complete until
all the enable criteria are met.
• If a fault in the secondary HO2S system caused the
MIL to come on, the readiness code cannot be set to
complete until you correct the fault.
Enable Criteria
• ECT at 158°F (70°C) or higher.
• Intake air temperature (IAT) at 20°F ( 7°C) or higher.
• Vehicle speed is steady, and vehicle speed sensor
(VSS) reads more than 25 mph (13 km/h).
Procedure
1. Connect the scan tool to the vehicle's data link
connector (DLC), and bring up the tool's generic
OBD II mode.
2. Start the engine.
3. Test-drive the vehicle under stop-and-go conditions
with short periods of steady cruise. After about 5
miles (3 km), the readiness code should switch
from incomplete to complete.
4. If the readiness code is still set to incomplete, check
for a temporary DTC. If there is no DTC, one or
more of the enable criteria were probably not met;
repeat the procedure.
(cont'd)
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