Infiniti M45 (Y34). Manual - part 431

 

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Infiniti M45 (Y34). Manual - part 431

 

 

DTC P0650 MIL

EC-413

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DTC P0650 MIL

PFP:24810

Component Description

ABS002MD

Malfunction Indicator Lamp (MIL) is located on the instrument panel. When the ignition switch is turned ON
without engine running, MIL will light up. This is a bulb check. When the engine is started, MIL should go off. If
MIL remains on, the on board diagnostic system has detected an engine system malfunction.

On Board Diagnosis Logic

ABS002ME

The MIL will not light up for this diagnosis.

FAIL-SAFE MODE

ECM enters fail-safe mode when both DTC P0650 and another DTC, which calls for MIL to light up, are
detected at the same time.

DTC Confirmation Procedure

ABS002MF

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.

If 1st trip DTC is detected, go to 

EC-415, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure WITH CONSULT-II above.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0650
0650

Malfunction indicator 
lamp (MIL) control circuit

An excessively high voltage is sent to ECM 
through the MIL circuit under the condition 
that calls for MIL light up.

An excessively low voltage is sent to ECM 
through the MIL circuit under the condition 
that calls for MIL not to light up.

Harness or connectors
(MIL circuit is open or shorted.)

MIL

Detected items

Engine operating condition in fail-safe mode

MIL circuit

Engine speed will not rise more than 2,500 rpm due to the fuel cut

SEF058Y

EC-414

DTC P0650 MIL

Wiring Diagram

ABS002MG

TBWA0297E

DTC P0650 MIL

EC-415

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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

ABS002MH

1. 

CHECK MIL POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect combination meter harness connector.

3.

Turn ignition switch ON.

4.

Check voltage between combination meter terminals 40, 42 and ground with CONSULT-II or tester

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

Fuse block (J/B) connector M1

10A fuse

Joint connector-10

Harness for open or short between fuse block (J/B) and combination meter

>> Repair open circuit or short to ground or short to power in harness or connectors.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

35

Y/G

MIL

[Ignition switch: ON]

0 - 1.0V

[Engine is running]

Idle speed

BATTERY VOLTAGE
(11 - 14V)

Voltage: Battery voltage

PBIB1150E

EC-416

DTC P0650 MIL

3. 

CHECK MIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 35 and combination meter terminal 52.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

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-19, "Removal and Installation of Combination Meter"

 .

Continuity should exist.

CONDITION

Combination meter terminal No. (Polarity)

Continuity

1

52 (+) - 40 (–)

Should exist.

52 (+) - 42 (–)

2

40 (+) - 52 (–)

Should not exist.

42 (+) - 52 (–)

PBIB1151E

 

 

 

 

 

 

 

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