Infiniti M35/M45 Y50. Manual — part 682

DTC P0850 PNP SWITCH

EC-1201

[VK45DE]

C

D

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EC

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

NBS005K8

1.

CHECK DTC WITH TCM

Refer to

AT-40, "OBD-II Diagnostic Trouble Code (DTC)"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace.

2.

CHECK STARTING SYSTEM

Turn ignition switch OFF, then turn it to START.
Does starter motor operate?

Yes or No

Yes

>> GO TO 3.

No

>> Refer to

SC-8, "STARTING SYSTEM"

.

3.

CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I

1.

Turn ignition switch OFF.

2.

Disconnect A/T assembly harness connector.

3.

Disconnect “unified meter and A/C amp.” harness connector.

4.

Check harness continuity between A/T assembly terminal 9 and “unified meter and A/C amp.” terminal 2.
Refer to Wiring Diagram.

5.

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 M72, F102

●

Harness for open or short between A/T assembly and “unified meter and A/C amp.”

>> 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)

102

G

PNP switch

[Ignition switch: ON]

●

Selector lever: P or N

Approximately 0V

[Ignition switch: ON]

●

Selector lever: Except above

BATTERY VOLTAGE
(11 - 14V)

Continuity should exist.

EC-1202

[VK45DE]

DTC P0850 PNP SWITCH

5.

CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 102 and “unified meter and A/C amp.” terminal 21.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 6.

NG

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

6.

CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-III

1.

Check harness continuity between A/T assembly terminal 9 and TCM terminal 8.
Refer to

AT-108, "DTC P0615 START SIGNAL CIRCUIT"

.

2.

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

OK or NG

OK

>> GO TO 7.

NG

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

7.

CHECK INTERMITTENT INCIDENT

Refer to

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

8.

REPLACE “UNIFIED METER AND A/C AMP.”

Refer to

DI-28, "UNIFIED METER AND A/C AMP"

.

>> INSPECTION END

Continuity should exist.

Continuity should exist.

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

EC-1203

[VK45DE]

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EC

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

PFP:23731

Component Description

NBS005K9

Intake valve timing control position sensors are located in the front of
cylinder heads in both bank 1 and bank 2.
This sensor uses a Hall IC.
The cam position is determined by the intake primary cam sprocket
concave (in four places). The ECM provides feedback to the intake
valve timing control for appropriate target valve open-close timing
according to drive conditions based on detected cam position.

CONSULT-II Reference Value in Data Monitor Mode

NBS005KA

Specification data are reference values.

On Board Diagnosis Logic

NBS005KB

DTC Confirmation Procedure

NBS005KC

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.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and let it idle for 10 seconds.

4.

If 1st trip DTC is detected, go to

EC-1207, "Diagnostic Proce-

dure"

.

WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF359Z

MONITOR ITEM

CONDITION

SPECIFICATION

INT/V TIM (B1)
INT/V TIM (B2)

●

Engine: After warming up

●

Selector lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

−

5

°

- 5

°

CA

2,000 rpm

Approx. 0

°

- 20

°

CA

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1140
1140
(bank 1)

Intake valve timing control
position sensor circuit

An excessively high or low voltage from
the sensor is sent to ECM.

●

Harness or connectors
(Intake valve timing control position sensor
circuit is open or shorted)

●

Intake valve timing control position sensor

●

Crankshaft position sensor (POS)

●

Camshaft position sensor (PHASE)

●

Accumulation of debris to the signal pick-up
portion of the camshaft sprocket

P1145
1145
(bank 2)

SEF058Y

EC-1204

[VK45DE]

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

Wiring Diagram

NBS005KD

BANK 1

TBWT1041E