Infiniti M45 (Y34). Manual - part 432

DTC P0650 MIL

EC-417

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6. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

EC-418

DTC P1065 ECM POWER SUPPLY

DTC P1065 ECM POWER SUPPLY

PFP:23710

Component Description

ABS002MI

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

ABS002MJ

DTC Confirmation Procedure

ABS002MK

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 four times.

6.

If 1st trip DTC is detected, go to 

EC-420, "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-419

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Wiring Diagram

ABS002ML

TBWA0320E

EC-420

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

ABS002MM

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-20

●

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