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DIAGNOSTICS
ECD SYSTEM (1ND--TV)
05--103
COROLLA Supplement (RM1129E)
DTC
P0263
CYLINDER 1 CONTRIBUTION/BALANCE
DTC
P0266
CYLINDER 2 CONTRIBUTION/BALANCE
DTC
P0269
CYLINDER 3 CONTRIBUTION/BALANCE
DTC
P0272
CYLINDER 4 CONTRIBUTION/BALANCE
DTC
P0300
RANDOM/MULTIPLE CYLINDER MISFIRE
DETECTED
HINT:
S
If DTC P0263 is displayed, check the No. 1 cylinder.
S
If DTC P0266 is displayed, check the No. 2 cylinder.
S
If DTC P0269 is displayed, check the No. 3 cylinder.
S
If DTC P0272 is displayed, check the No. 4 cylinder.
CIRCUIT DESCRIPTION
Misfire: The ECM uses the crankshaft position sensor and camshaft position sensor to monitor changes in
the crankshaft rotation for each cylinder.
The ECM counts the number of times the engine speed change rate indicates that a misfire has occurred.
And when the misfire rate equals or exceeds the threshold indicating that the engine condition has deterio-
rated, the CHK ENG (MIL) lights up.
HINT:
S
The cylinder, which has the compensation value for Revised Injection Volume #1, #2, #3 and #4 that
varies from other cylinders, may be malfunctioning.
S
If only DTCs P0263, P0266, P0269, P0272 and/or P0300 are present, an injector mechanical malfunc-
tion (valve clearance etc) or insufficient compression has probably occurred. An open or short malfunc-
tion of the ECM or injector circuit is unlikely.
DTC No.
DTC Detection Condition
Main Trouble Area
Related Trouble Area
P0263
P0266
P0269
P0272
P0300
Significant fluctuations in engine speed while idling
(The MIL is illuminated and a DTC is set when the
same malfunction is detected on 2 consecutive trips*
*: One trip is counted when the ignition switch is
turned from OFF to ON and back to OFF)
S
Injector
S
Open or short in engine wire har-
ness.
S
Connector connection
S
Compression pressure
S
Valve clearance
S
Valve timing
S
ECM
S
Low quality fuel
S
Injector compensation code
HINT:
These DTCs are set when the engine idles for 10 minutes or more with warmed up engine.
WIRING DIAGRAM
Refer to DTCs P0201, P0202, P0203 ,P0204 and P2146 on page 05 -- 87
05MRY--01
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E