Cancelling Diagnostic Code; Diagnosis Indication - Toyota 3F-E Repair Manual Supplement

7'
C o
EFI Fuse 15A
Diagnosis System
EFI SYSTEM -

CANCELLING DIAGNOSTIC CODE

1
After repair of the trouble area, the diagnostic code re-
tained in memory by the ECU must be cancelled out by
removing the EFI fuse (15A) for 30 seconds or more,
depending on ambient temperature (the lower the tem-
perature, the longer the fuse must be left out) with the
ignition switch OFF.
HINT:
• Cancellation can also be done by removing the battery
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negative (-) terminal, but in this case, other memory
systems (clock, etc.) will also be cancelled out.
- if the diagnostic code is not cancelled out, it will be
etained by the ECU and appear along with a new code
n the event of future trouble.
fit is necessary to work on engine components requir-
ng removal of the battery terminal, a check must first
)e made to see if a diagnostic code has been recorded.
er cancellation, road test the vehicle to check that a
)r mal" code is now read on the "CHECK" engine
rning light.
ie same diagnostic code appears, it indicates that the
able area has not been repaired thoroughly.
VOSIS INDICATION
luding "normal", the ECU is programmed with the
owing 18 diagnostic codes.
en 2 or more codes are indicated, the lowest number
de) will appear first.
wever, no other code will appear along with code
11.
detected diagnostic codes, except code No.51, will
•
etained in memory by the ECU from the time of detec-
i until cancellation.
;e the malfunction is cleared, the "CHECK" engine
-ning light on the instrument panel will go out but the
jnostic code(s) remains stored in ECU memory (ex-
t for code No.51 ).
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