05L6O -- 07
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DIAGNOSTICS
ECD SYSTEM (1ND -- TV)
05 -- 19
COROLLA Supplement (RM1129E)
REGISTRATION
NOTICE:
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When an injector is replaced, the injector ’s compensation code must be input into the ECM.
When the ECM is changed, all of the existing injector compensation codes must be input into
the new ECM.
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An injector compensation code is unique. The 10 -- digit alphanumeric code imprinted on the
head portion of an injector is its compensation code. If an incorrect injector compensation code
is input into the ECM, the engine assembly may rattle or engine idling may become rough. In
addition, engine failure may occur and the life of the engine may be shortened.
1. When you replace the ECM with a new one, input all the injectors’ compensation codes into the
new ECM as follows:
(a) Prior to replacing the ECM, read and save each injector ’s c ompensation c ode, stored in the original
ECM, using the intelligent tester II
(b) After installing a new ECM, input the s aved compensation c odes into the new ECM using the tester
(see page 05 -- 19 ).
(c)
Turn the tester OFF and then turn the ignition switch to OFF.
(d)
Wait for at least 30 seconds.
(e)
Turn the ignition switch to ON and then turn the tester ON.
(f) Clear DTC P0603 stored in the ECM using the tester
HINT:
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Each injector has different fuel injection characteristics. In order to optimize the fuel injections, the ECM
uses the compensation codes to balance the different fuel injections between each injector.
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When you first turn the ignition switch to ON after replacing the ECM or an injector(s), DTC P0603 is
set. This is to inform you that an injector compensation code(s) is/are required to be registered. Manu-
ally clear the DTC upon completion of the compensation code registration.
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E