Infiniti F50. Manual — part 443
DTC P0650 MIL
EC-413
C
D
E
F
G
H
I
J
K
L
M
A
EC
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors F105, M135
●
Harness for open or short between ECM and combination meter
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK COMBINATION METER
1.
Turn ignition switch “OFF”.
2.
Disconnect combination meter harness connector.
3.
Check continuity under the following conditions.
OK or NG
OK
>> GO TO 6.
NG
>> Replace combination meter. Refer to
DI-27, "Removal and Installation for Combination Meter"
.
6.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
CONDITION
Combination meter terminal No. (Polarity)
Continuity
1
65 (+) - 59 (–)
Should exist.
2
59 (+) - 65 (–)
Should not exist.
PBIB1399E
EC-414
DTC P1065 ECM POWER SUPPLY
DTC P1065 ECM POWER SUPPLY
PFP:23710
Component Description
EBS00MGR
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 vol-
ume learning value memory, etc.
On Board Diagnosis Logic
EBS00MGS
DTC Confirmation Procedure
EBS00MGT
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.
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 for 4 times.
6.
If 1st trip DTC is detected, go to
EC-416, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF093X
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1065
1065
ECM power supply circuit
ECM back-up RAM system does not
function properly.
●
Harness or connectors
[ECM power supply (back-up) circuit is
open or shorted.]
●
ECM
SEF058Y
DTC P1065 ECM POWER SUPPLY
EC-415
C
D
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F
G
H
I
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K
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M
A
EC
Wiring Diagram
EBS00MGU
TBWM0106E
EC-416
DTC P1065 ECM POWER SUPPLY
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
EBS00MGV
1.
CHECK ECM POWER SUPPLY
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check voltage between ECM terminal 95 and ground with CON-
SULT-II or tester.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M135, F105
●
Joint connector-16
●
Fuse block (J/B) No.2 connector M145
●
10A fuse
●
Harness for open or short between ECM and battery
>> Repair or replace harness or connectors.
3.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness or connectors.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
95
W
Power supply for ECM
(Back-up)
[Ignition switch “OFF”]
BATTERY VOLTAGE
(11 - 14V)
Voltage: Battery voltage
PBIB0087E
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