Honda Accord 2008 Manual page 432

07/11/02 09:04:06 61TA0000_110_0113
DTC P0300: Random Misfire and Any
Combination of the Following:
DTC P0301: No. 1 Cylinder Misfire Detected
DTC P0302: No. 2 Cylinder Misfire Detected
DTC P0303: No. 3 Cylinder Misfire Detected
DTC P0304: No. 4 Cylinder Misfire Detected
Special Tools Required
• Pressure gauge adapter 07NAJ-P07010A
• A/T low pressure gauge w/panel 07406-0070301
• A/T pressure hose 07406-0020201
• A/T pressure hose, 2,210 mm 07MAJ-PY4011A
• A/T pressure hose, adapter 07MAJ-PY40120
• Oil pressure hose 07ZAJ-S5A0200
NOTE:
• Before you troubleshoot, record all freeze data and
any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
• If the misfire is frequent enough to trigger detection
of increased emissions during two consecutive
driving cycles, the MIL will come on, and DTC P0300
(and some combination of P0301 through P0304) will
be stored.
• If the misfire is frequent enough to damage the
catalyst, the MIL will flash whenever the misfire
occurs, and DTC P0300 (and some combination of
P0301 through P0304) will be stored. When the
misfire stops, the MIL will remain on.
• If any of the DTCs listed below are indicated at the
same time as the random misfire DTCs, troubleshoot
those DTCs first, then recheck for random misfire
DTCs:
P0101, P0102, P0103: Mass air flow (MAF) sensor
P0107, P0108: Manifold absolute pressure (MAP)
sensor
P0171, P0172: Fuel system
P0335, P0339: Crankshaft position (CKP) sensor
P0365, P0369: Camshaft position (CMP) sensor B
P0506, P0507: Idle control system
P2646, P2647, P2648, P2649: VTEC system
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle without load (A/T in
P or N, M/T in neutral).
4. Monitor the OBD STATUS for DTC P0301, P0302,
P0303, or P0304 in the DTCs MENU with the HDS.
Does the screen indicate F AILED?
YES − Go to step 9.
−
NO If the screen indicates PASSED, go to step 5. If
the screen indicates EXECUTING, keep idling until
a result comes on. If the screen indicates OUT OF
CONDITION or NOT COMPLETED, wait for several
minutes, then recheck.
5. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3
MISFIRE, and/or CYL4 MISFIRE in the DATA LIST
for 10 minutes with the HDS.
Does the CY L1 MISF IRE, CY L2 MISF IRE, CY L3
MISF IRE, and/ or CY L4 MISF IRE show misf ire
counts?
YES − Go to step 9.
NO − Go to step 6.
6. Test-drive the vehicle for several minutes in the
range of these recorded freeze data parameters:
• ENGINE SPEED
• VSS
• REL TP SENSOR
• CLV (calculated load value)
• APP SENSOR
7. Monitor the OBD STATUS for DTC P0301, P0302,
P0303, or P0304 in the DTCs MENU with the HDS.
Does the screen indicate F AILED?
YES − Go to step 9.
NO − If the screen indicates PASSED, go to step 8. If
the screen indicates EXECUTING, keep driving until
a result comes on. If the screen indicates OUT OF
CONDITION or NOT COMPLETED, go to step 6 and
recheck.
ＴＡ０８ＡＥＡＫ７２１０００９０３００ＦＡＡＴ３０
(cont'd)
11-113