Infiniti FX35 / FX45. Manual - part 564

DTC P0850 PNP SWITCH

EC-1017

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Diagnosis Procedure

INFOID:0000000001326878

1.

CHECK DTC WITH TCM

Refer to 

AT-38, "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

.

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 32.
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 F102, M82
• 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.

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 25.
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

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

102

LG/B

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.

Continuity should exist.

EC-1018

< SERVICE INFORMATION >

[VK45DE]

DTC P0850 PNP SWITCH

1.

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

AT-97

.

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-717

.

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

8.

REPLACE “UNIFIED METER AND A/C AMP.”

Refer to 

DI-26

.

>> INSPECTION END

Continuity should exist.

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

EC-1019

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

Component Description

INFOID:0000000001326879

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 camshaft sprocket con-
cave (in four places). The ECM provides feedback to the intake valve
timing control for appropriate target valve open-close timing accord-
ing to drive conditions based on detected cam position.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001326880

Specification data are reference values.

On Board Diagnosis Logic

INFOID:0000000001326881

DTC Confirmation Procedure

INFOID:0000000001326882

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-III

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-III.

3.

Start engine and drive vehicle under the following conditions for at least 10 seconds.

4.

Check 1st trip DTC.

5.

If 1st trip DTC is detected, go to 

EC-1023, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-III” 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 sprock-
et

P1145
1145
(Bank 2)

ENG SPEED

More than idle speed

Selector lever

P or N position

EC-1020

< SERVICE INFORMATION >

[VK45DE]

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

Wiring Diagram

INFOID:0000000001326883

BANK 1

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.

CAUTION:

TBWM1347E