A02469
Engine ECU
BATT
E5
2
Y
2
2
1
2
W
Battery
15A EFI
Engine Room J/B
IJ1
Y
14
DI--54
--
DIAGNOSTICS
ENGINE (1RZ--E)
Back Up Power Source Circuit
CIRCUIT DESCRIPTION
Battery positive voltage is supplied to terminal BATT of the ECU even when the ignition switch is OFF for
use by the diagnostic trouble code memory, air--fuel ratio adaptive control value memory, etc.
WIRING DIAGRAM
DI1HZ--01
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Pages From Supplement
3RZ-F,3RZ-FE