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Infiniti QX56 (Z62). Manual - part 601

EC-382

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0643 SENSOR POWER SUPPLY

Is the inspection result normal?

YES

>> GO TO 3.

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

CHECK COMPONENTS

Check the following.
• Camshaft position sensor (bank 2) (Refer to

EC-306, "Component Inspection (Camshaft Position Sensor)"

• Manifold absolute pressure (MAP) sensor (Refer to

EC-208, "Component Inspection (MAP Sensor)"

Is the inspection result normal?

YES

>> GO TO 4.

>> Replace malfunctioning component.

CHECK THROTTLE POSITION SENSOR

Refer to

EC-220, "Component Inspection (Throttle Position Sensor)"

Is the inspection result normal?

YES

>> GO TO 8.

>> GO TO 5.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace electric throttle control actuator. Refer to

EM-30, "Removal and Installation"

>> INSPECTION END

CHECK ACCELERATOR PEDAL POSITION SENSOR

Refer to

EC-470, "Component Inspection (Accelerator Pedal Position Sensor)"

Is the inspection result normal?

YES

>> GO TO 8.

>> GO TO 7.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Refer to

ACC-3, "MODELS WITHOUT DISTANCE CONTROL ASSIST

SYSTEM : Removal and Installation"

(Without distance control assist system) or

ACC-4, "MODELS WITH

DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation"

(With distance control assist system).

>> INSPECTION END

CHECK INTERMITTENT INCIDENT

Refer to

GI-40, "Intermittent Incident"

>> INSPECTION END

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F111

Electric throttle control actuator

F66

Camshaft position sensor (bank 2)

F83

Manifold absolute pressure (MAP) sensor

F65

E80

137

APP sensor 1 (Without ICC)

E110

137

APP sensor 1 (With ICC)

E67

P0850 PNP SWITCH

EC-383

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0850 PNP SWITCH

Description

INFOID:0000000006217884

When the selector lever position is P or N, park/neutral position (PNP) signal is sent to ECM from TCM.

DTC Logic

INFOID:0000000006217885

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

INSPECTION START

Will CONSULT-III be used?

YES

>> GO TO 2.

>> GO TO 5.

PRECONDITIONING

Turn ignition switch OFF and wait at least 10 seconds.

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 3.

CHECK PNP SIGNAL

WITH CONSULT-III

Turn ignition switch ON.

Select “P/N POSI SW” in “DATA MONITOR” mode with CONSULT-III. Then check the “P/N POSI SW” sig-
nal under the following conditions.

Is the inspection result normal?

YES

>> GO TO 4.

>> Go to

EC-384, "Diagnosis Procedure"

PERFORM DTC CONFIRMATION PROCEDURE

Select “DATA MONITOR” mode with CONSULT-III.

Start engine and warm it up to normal operating temperature.

Maintain the following conditions for at least 50 consecutive seconds.

CAUTION:

Always drive vehicle at a safe speed.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0850

P-N POS SW/CIRCUIT
(Park/neutral position
switch)

The signal of the park/neutral position (PNP)
signal does not change during driving after the
engine is started.

• Harness or connectors

[The park/neutral position (PNP) signal
circuit is open or shorted.]

• TCM

Position (Selector lever)

Known-good signal

N or P position

Except above position

OFF

ENG SPEED

1,300 - 6,375 rpm

COOLAN TEMP/S

More than 70

C (158

B/FUEL SCHDL

2.0 - 31.8 msec

EC-384

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0850 PNP SWITCH

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to

EC-384, "Diagnosis Procedure"

>> INSPECTION END

PERFORM COMPONENT FUNCTION CHECK

WITH GST

Perform Component Function Check. Refer to

EC-384, "Component Function Check"

NOTE:
Use Component Function Check to check the overall function of the park/neutral position (PNP) signal circuit.
During this check, a 1st trip DTC might not be confirmed.

Is the inspection result normal?

YES

>> INSPECTION END

>> Go to

EC-384, "Diagnosis Procedure"

Component Function Check

INFOID:0000000006217886

PERFORM COMPONENT FUNCTION CHECK

WITH GST

Turn ignition switch ON.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

>> Go to

EC-384, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000006217887

CHECK DTC WITH TCM

Refer to

TM-61, "CONSULT-III Function (TRANSMISSION)"

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair or replace malfunctioning part.

CHECK STARTING SYSTEM

Turn ignition switch OFF, then turn it to START.

Does starter motor operate?

YES

>> GO TO 3.

>> Check DTC with BCM. Refer to

BCS-57, "DTC Index"

CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.

Disconnect A/T assembly harness connector.

Disconnect ECM harness connector.

Check the continuity between A/T assembly harness connector and ECM harness connector.

VHCL SPEED SE

More than 64 km/h (40 mph)

Selector lever

Suitable position

ECM

Condition

Voltage (V)

Connector

–

Terminal

F111

175

Selector lever

P or N position

Battery voltage

Except above position

Approx. 0

P0850 PNP SWITCH

EC-385

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

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

Is the inspection result normal?

YES

>> GO TO 5.

>> GO TO 4.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between A/T assembly and ECM
• Loose or poor connection for each connector and harness

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

CHECK INTERMITTENT INCIDENT

Refer to

GI-40, "Intermittent Incident"

>> INSPECTION END

A/T assembly

ECM

Continuity

Connector

Terminal

Connector

Terminal

F301

F111

Existed

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