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SEF093X
Component Description
NFEC1263
Battery voltage is supplied to the ECM even when the ignition
switch is turned OFF for the ECM memory function of the DTC
memory, the air fuel ratio feedback compensation value memory,
the idle air volume learning value memory, etc.
On Board Diagnosis Logic
NFEC1264
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1065
1065
ECM power supply cir-
cuit
ECM back-up RAM system does not function
properly.
I Harness or connectors
[ECM power supply (back-up) circuit
is open or shorted.]
I ECM
DTC Confirmation Procedure
NFEC1265
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
SEF058Y
With CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. Turn ignition switch “OFF”, wait at least 10 seconds, and then
turn “ON”.
5. Repeat steps 3 and 4 four times.
6. If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-463.
With GST
Follow the procedure “WITH CONSULT-II” above.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1065 ECM POWER SUPPLY (BACK UP)
Component Description
EC-461
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