Honda Accord 2008 Manual page 501

07/11/02 09:10:07 61TA0000_110_0182
PGM-FI System
DTC Troubleshooting (cont'd)
DTC P2227: BARO Sensor Circuit Range/
Performance Problem
NOTE:
• Before you troubleshoot, record all freeze data and
any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
• If DTC P0107, P0108, P1128, and/or P1129 are stored
at the same time as DTC P2227, troubleshoot those
DTCs first, then recheck for DTC P2227.
1. Turn the ignition switch to ON (II), and wait
2 seconds.
2. Check the BARO SENSOR in the DATA LIST with
the HDS.
Is about 101 kPa ( 29.9 in.Hg, 7 60 mmHg), or about
2.9 V at sea level indicated?
−
YES Go to step 3.
NO − Go to step 7.
3. Clear the DTC with the HDS.
4. Start the engine. Hold the engine speed at
3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
5. Test-drive under these conditions:
• Engine coolant temperature (ECT SENSOR 1)
above 158 °F (70 °C)
• A/T in D, M/T in 4th
• REL TP SENSOR between 16 deg and 28 deg for
at least 3 seconds
6. Monitor the OBD STATUS for DTC P2227 in the
DTCs MENU with the HDS.
Does the screen indicate F AILED?
−
YES Go to step 7.
NO − If the screen indicates PASSED, intermittent
failure, the system is OK at this time. Check for
something that may have clogged the intake air
system. If the screen indicates NOT COMPLETED,
go to step 4 and recheck.
11-182
7. Check the intake air system for clogging or
restrictions (foreign material, dirty air cleaner
element, etc.).
Is the intake air system clogged or restricted?
YES − Remove the clog or restriction, then go to
step 9.
−
NO Go to step 8.
8. Update the ECM/PCM if it does not have the latest
software (see page 11-231), or substitute a known-
good ECM/PCM (see page 11-7).
9. Start the engine. Hold the engine speed at
3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
10. Test-drive under these conditions:
• Engine coolant temperature (ECT SENSOR 1)
above 158 °F (70 °C)
• A/T in D, M/T in 4th
• REL TP SENSOR between 16 deg and 28 deg for
at least 3 seconds
11. Check for Temporary DTCs or DTCs with the HDS.
Is DT C P2227 indicated?
−
YES Check for poor connections or loose
terminals at the ECM/PCM. If the ECM/PCM was
updated, substitute a known-good ECM/PCM
(see page 11-7), then go to step 9. If the ECM/PCM
was substituted, go to step 1.
−
NO Go to step 12.
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