−
DIAGNOSTICS
ENGINE (2ZZ
−
GE)
DI
−
459
2005 CELICA (RM1131U)
DTC
P0300
Random/Multiple Cylinder Misfire Detected
DTC
P0301
Cylinder 1 Misfire Detected
DTC
P0302
Cylinder 2 Misfire Detected
DTC
P0303
Cylinder 3 Misfire Detected
DTC
P0304
Cylinder 4 Misfire Detected
CIRCUIT DESCRIPTION
When a misfire occurs in the engine, hydrocarbons (HC) are output in high concentrations. If this HC con-
centration is high enough, there could be an increase in exhaust emission levels. High concentrations of HC
passing through the catalyst also cause the temperature of the catalyst to increase, possibly damaging the
catalyst. To prevent this increase in the emissions and limit the possibility of thermal damage, the ECM moni-
tors the misfire rate. When the temperature of the catalyst reaches a point of thermal degradation, the ECM
will blink the MIL. For monitoring misfire, the ECM uses both camshaft position sensor and the crankshaft
position sensor. The camshaft position sensor is used to identify misfiring cylinders and crankshaft position
sensor is used to measure variations in the crankshaft rotation speed. A misfire is counted when crankshaft
rotation speed variations exceed threshold values.
The ECM illuminates the MIL if the misfiring rate exceeds a threshold value, which could cause emission
deterioration.
DTC No.
DTC Detection Condition
Trouble Area
P0300
Misfiring of random cylinder is detected
S
Open or short in engine wire
S
Connector connection
S
Vacuum hose connection
S
Ignition system
S
Injector
S
Fuel pressure
S
Mass air flow meter
S
Engine coolant temperature sensor
S
Compression pressure
S
Valve clearance
S
Valve timing
S
VVTL
−
i system (rocker arm)
S
PCV hose connection
S
PCV hose
S
ECM
P0301
P0302
P0303
P0304
Misfiring of each cylinder is detected
HINT:
When codes for a misfiring cylinder are recorded repeatedly but no random misfire code is recorded, it indi-
cates that the misfires have been detected and recorded at different times.
DIC7F
−
02
657
Содержание Celica 2005
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Страница 260: ... DIAGNOSTICS ENGINE 1ZZ FE DI 61 2005 CELICA RM1131U MEMO 259 ...
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Страница 512: ...A21571 DIAGNOSTICS ENGINE 2ZZ GE DI 313 2005 CELICA RM1131U 511 ...
Страница 699: ...DI 500 DIAGNOSTICS ENGINE 2ZZ GE 2005 CELICA RM1131U MEMO 698 ...
Страница 879: ...A21571 DI 680 DIAGNOSTICS AUTOMATIC TRANSAXLE U240E 2005 CELICA RM1131U 878 ...
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Страница 970: ...A21571 DIAGNOSTICS AUTOMATIC TRANSAXLE U341E DI 769 2005 CELICA RM1131U 969 ...
Страница 971: ...A21572 A22718 A22768 DI 770 DIAGNOSTICS AUTOMATIC TRANSAXLE U341E 2005 CELICA RM1131U 970 ...
Страница 972: ...A21573 DIAGNOSTICS AUTOMATIC TRANSAXLE U341E DI 771 2005 CELICA RM1131U 971 ...
Страница 973: ...A21575 DI 772 DIAGNOSTICS AUTOMATIC TRANSAXLE U341E 2005 CELICA RM1131U 972 ...
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Страница 2220: ...I11735 Connector A Connector B BODY ELECTRICAL COMBINATION METER BE 45 2005 CELICA RM1131U 2219 ...
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Страница 2352: ...BO1E6 06 H12582 Side Mud Guard 9 Clips BO 46 BODY SIDE MUD GUARD 2005 CELICA RM1131U SIDE MUD GUARD COMPONENTS 2351 ...
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