Infiniti Q45. Manual - part 465

DTC P0850 PNP SWITCH

EC-499

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Wiring Diagram

NBS00253

TBWM0573E

EC-500

DTC P0850 PNP SWITCH

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

NBS00254

1. 

CHECK DTC WITH TCM

Refer to 

AT-38, "ON BOARD DIAGNOSTIC (OBD) SYSTEM"

 .

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-9, "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 fuse block (J/B) No. 1 connector M1.

4.

Check harness continuity between A/T assembly terminal 9 and fuse block (J/B) No. 1 terminal 17D.
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 M135, F105

●

Harness for open or short between A/T assembly and fuse block (J/B) No. 1

>> 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

GY/R

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.

DTC P0850 PNP SWITCH

EC-501

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5. 

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

1.

Disconnect fuse block (J/B) No. 1 connector E201.

2.

Check harness continuity between fuse block (J/B) No. 1 terminal 1E and ground.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 6.

NG

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

6. 

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

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 102 and fuse block (J/B) No. 1 terminal 19D.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F105, M135

●

Harness for open or short between ECM and fuse block (J/B) No. 1

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

8. 

CHECK FUSE BLOCK (J/B) NO. 1

Refer to 

PG-70, "FUSE BLOCK - JUNCTION BOX (J/B) NO. 1"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace fuse block (J/B) No. 1

9. 

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-102, "DTC P0615 START SIGNAL CIRCUIT"

 .

2.

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

OK or NG

OK

>> GO TO 10.

NG

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

10. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

Continuity should exist.

Continuity should exist.

EC-502

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

PFP:23731

Component Description

NBS00209

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

NBS0020A

Specification data are reference values.

On Board Diagnosis Logic

NBS0020B

DTC Confirmation Procedure

NBS0020C

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-507, "Diagnostic Procedure"

.

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