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100S Q -- 01
A98601
(a)
(b)
(b)
--
ENGINE CONTROL SYSTEM
ECM (1ND -- TV)
10 -- 15
COROLLA Supplement (RM1129E)
ECM (1ND -- TV)
REPLACEMENT
NOTICE:
S
If an incorrect injector compensation code was registered with the ECM, the engine assembly
may rattle or the engine idling may become rough. In addition, the engine may stall or the life
of the engine may be shortened.
S
When replacing the ECM with a new one, register all the injectors’ injector compensation codes
with the new ECM as follows.
S
Before replacing the ECM, read all the compensation codes stored in the existing ECM using
the intelligent tester II, then note them down
S
After replacing the ECM, enter the noted compensation codes into the new ECM using the intel-
ligent tester II
S
Turn the ignition switch to OFF, then wait for 30 seconds or more.
S
Turn the ignition switch to ON, then clear DTC P0603 using the intelligent tester II
HINT:
S
In order to optimize the injector’s fuel injection performance, the ECM adjusts the injection duration
of each cylinder. The ECM stores and uses compensation data in the form of a 10--digit--alphanumeric
value that is imprinted on the head portion of each injector as the injector compensation code.
S
When installing a new injector, its individual injector compensation code needs to be registered with
the ECM. Also, when replacing the ECM, the compensation codes of all the injectors need to be regis-
tered with the new ECM.
S
Once the ECM is replaced, DTC P0603 will be present when turning the ignition switch to ON. This
injector compensation codes need to be registered with the ECM. In order to clear the DTC, register
the compensation codes first, then turn the ignition switch to OFF and wait for 30 seconds or longer.
1.
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. REMOVE GLOVE COMPARTMENT DOOR ASSY
(See Pub No. RM925E, page 71 -- 26)
3.
REMOVE INSTRUMENT PANEL UNDER COVER SUB--ASSY NO.2
(See Pub No. RM925E, page 71--29)
4.
REMOVE ECM
(a)
Remove the wire harness from the wire harness clamp.
(b)
Slide the slider and disconnect the 2 ECM connectors.
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E