Clearing Diagnostic Code - Toyota COMPUTER-CONTROLLED SYSTEM Training Manual

STO P
(1 5A)
CHECKING AND CLEARING DIAGNOSTIC CODE S
CLEARING DIAGNOSTIC COD E
(a) After the trouble is repaired, the diagnostic code
retained in memory by the Engine ECU must be
cleared by removing the STOP ( 15 A) fuse or EFI
(15 A) fuse for 10 seconds or longer, depending on
the ambient temperature (the lower the
temperature, the longer the fuse must be left out)
with the ignition switch off .
NOTE :
• Clearing the memory can also be done by
removing the ba tt ery cable from the negative
terminal, but in this case other memo ry systems
(radio, clock, etc .) will also be cleare d
• If it is necessa ry to work on engine components
requiring removal of the cable from the battery
terminal, a check must first be made to see if
any diagnostic codes have been recorded .
(b) After clearing the memory, pe
rf
orm a road test to
confirm that
a "normal"
code can now be read .
If the same diagnostic code as before appears, it
indicates that the trouble has not been completely
remedied .
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