Nissan Pathfinder (2006 year). Manual - part 203

DTC P0643 SENSOR POWER SUPPLY

EC-483

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2006 Pathfinder

3. 

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between APP sensor terminal 2 and ECM terminal 90.
Refer to Wiring Diagram.

OK or NG

OK

>> GO TO 4.

NG

>> Repair open circuit.

4. 

CHECK SENSOR POWER SUPPLY CIRCUITS

Check harness for short to power and short to ground, between the following terminals.

OK or NG

OK

>> GO TO 5.

NG

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

5. 

CHECK COMPONENTS

Check the following.

●

EVAP control system pressure sensor (Refer to 

EC-424, "Component Inspection"

 .)

●

Refrigerant pressure sensor (Refer to 

ATC-18, "Components"

 .)

●

Battery current sensor (Refer to 

EC-512, "Component Inspection"

 .)

●

Power steering pressure sensor (Refer to 

EC-471, "Component Inspection"

 .)

OK or NG

OK

>> GO TO 8.

NG

>> Replace malfunctioning component.

6. 

CHECK APP SENSOR

Refer to 

EC-587, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly.

2.

Perform 

EC-77, "Accelerator Pedal Released Position Learning"

 .

3.

Perform 

EC-77, "Throttle Valve Closed Position Learning"

 .

4.

Perform 

EC-77, "Idle Air Volume Learning"

 .

>> INSPECTION END

Continuity should exist.

ECM terminal

Sensor terminal

Reference Wiring Diagram

90

APP sensor terminal 2

EC-480

48

EVAP control system pressure sensor terminal 3

EC-427

49

Refrigerant pressure sensor terminal 3

EC-660

Battery current sensor terminal 1

EC-509

68

PSP sensor terminal 3

EC-468

EC-484

DTC P0643 SENSOR POWER SUPPLY

2006 Pathfinder

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-144, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

DTC P0850 PNP SWITCH

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2006 Pathfinder

DTC P0850 PNP SWITCH

PFP:23006

Component Description

UBS00KGD

When the selector lever position is P or N, park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal) exists.

CONSULT-II Reference Value in Data Monitor Mode

UBS00KGE

Specification data are reference values.

On Board Diagnosis Logic

UBS00KGF

DTC Confirmation Procedure

UBS00KGG

CAUTION:

Always drive vehicle at a safe speed.

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 “P/N POSI SW” in “DATA MONITOR” mode with CON-
SULT-II. Then check the “P/N POSI SW” signal under the follow-
ing conditions.

If NG, go to 

EC-488, "Diagnostic Procedure"

 .

If OK, go to following step.

3.

Select “DATA MONITOR” mode with CONSULT-II.

4.

Start engine and warm it up to normal operating temperature.

5.

Maintain the following conditions for at least 60 consecutive sec-
onds.

6.

If 1st trip DTC is detected, go to 

EC-488, "Diagnostic Procedure"

.

MONITOR ITEM

CONDITION

SPECIFICATION

P/N POSI SW

●

Ignition switch: ON

Shift lever: P or N

ON

Shift lever: Except above

OFF

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0850
0850

Park/neutral position 
switch

The signal of the park/neutral position (PNP) 
switch is not changed in the process of engine 
starting and driving.

●

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

●

Park/neutral position (PNP) switch

●

Combination meter

●

TCM

Position (Selector lever)

Known-good signal

P or N position

ON

Except above position

OFF

ENG SPEED

1,400 - 6,375 rpm

COOLAN TEMP/S

More than 70

°

C (158

°

F)

B/FUEL SCHDL

2.0 - 31.8 msec

VHCL SPEED SE

More than 64 km/h (40 MPH)

Selector lever

Suitable position

SEF212Y

SEF213Y

EC-486

DTC P0850 PNP SWITCH

2006 Pathfinder

Overall Function Check

UBS00KGH

Use this procedure to check the overall function of the park/neutral position (PNP) switch circuit. During this
check, a 1st trip DTC might not be confirmed.

 WITH GST

1.

Turn ignition switch ON.

2.

Check voltage between ECM terminal 102 (PNP switch signal)
and ground under the following conditions.

3.

If NG, go to 

EC-488, "Diagnostic Procedure"

 .

Condition (Gear position)

Voltage V (Known-good data)

P or N position

Approx. 0

Except above position

BATTERY VOLTAGE

(11 - 14V)

MBIB0043E

DTC P0850 PNP SWITCH

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2006 Pathfinder

Wiring Diagram

UBS00KGI

BBWA2374E

EC-488

DTC P0850 PNP SWITCH

2006 Pathfinder

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

UBS00KGJ

1. 

CHECK DTC WITH TCM

Refer to 

AT-44, "TROUBLE DIAGNOSIS"

 .

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-10, "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 combination meter harness connector.

4.

Check harness continuity between A/T assembly terminal 9 and combination meter terminal 17.
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 M31, E152

●

Harness connectors E5, F14

●

Harness for open or short between A/T assembly 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)

102

G

PNP switch

[Ignition switch: ON]

●

Shift lever: P or N

Approximately 0V

[Ignition switch: ON]

●

Except above position

BATTERY VOLTAGE
(11 - 14V)

Continuity should exist.

DTC P0850 PNP SWITCH

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2006 Pathfinder

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 combination meter terminal 7.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E152, M31

●

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.

7. 

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-106, "DTC P0615 START SIGNAL CIRCUIT"

 .

2.

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

OK or NG

OK

>> GO TO 8.

NG

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

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-144, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace.

9. 

REPLACE COMBINATION METER

Refer to 

DI-4, "COMBINATION METERS"

 .

>> INSPECTION END

Continuity should exist.

Continuity should exist.

EC-490

DTC P1148, P1168 CLOSED LOOP CONTROL

2006 Pathfinder

DTC P1148, P1168 CLOSED LOOP CONTROL

PFP:22690

On Board Diagnosis Logic

UBS00KD7

These self-diagnoses have the one trip detection logic.

DTC P1148 or P1168 is displayed with another DTC for air fuel ratio (A/F) sensor 1.
Perform the trouble diagnosis for the corresponding DTC.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1148
1148
(Bank 1)

Closed loop control 
function

The closed loop control function for bank 1 
does not operate even when vehicle is driving 
in the specified condition.

●

Harness or connectors
[The air fuel ratio (A/F) sensor 1 circuit is 
open or shorted.]

●

Air fuel ratio (A/F) sensor 1

●

Air fuel ratio (A/F) sensor 1 heater

P1168
1168
(Bank 2)

The closed loop control function for bank 2 
does not operate even when vehicle is driving 
in the specified condition.