Nissan Qashqai J11. Manual - part 333

P0850 REVERSE/NEUTRAL POSITION SWITCH

ECM-309

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

4.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

ECM-309, "CVT : Diagnosis Procedure"

.

NO

>> INSPECTION END

5.

PERFORM COMPONENT FUNCTION CHECK

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground as per the following conditions.

Is the inspection result normal?

YES-1 >> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

YES-2 >> Confirmation after repair: INSPECTION END
NO

>> Proceed to 

ECM-309, "CVT : Diagnosis Procedure"

.

CVT : Diagnosis Procedure

INFOID:0000000010703002

1.

CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect transmission range switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between transmission range switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform the trouble diagnosis for power supply circuit.

2.

CHECK TRANSMISSION RANGE SWITCH SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between transmission range switch harness connector and ECM harness connector.

4.

Also check harness for short to ground and to power.

ENG SPEED

1,600 - 6,375 rpm

COOLAN TEMP/S

More than 70

°

C (158

°

F)

B/FUEL SCHDL

1.7 - 31.8 msec

VHCL SPEED SE

More than 64 km/h (40 mph)

Shift lever

Suitable position

+

−

Condition

Voltage

(Approx.)

ECM

Connector

Terminal

F15

14

Ground

Selector lever

P or N

Battery voltage

Except above

0 V

+

−

Voltage

Transmission range switch

Connector

Terminal

F61

1

Ground

Battery voltage

+

−

Continuity

Transmission range switch

ECM

Connector

Terminal

Connector

Terminal

F61

2

F15

14

Existed

ECM-310

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0850 REVERSE/NEUTRAL POSITION SWITCH

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK TRANSMISSION RANGE SWITCH

Check the transmission range switch. Refer to 

TM-303, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace transaxle assembly. Refer to 

TM-415, "Removal and Installation"

.

M/T

M/T : DTC Description

INFOID:0000000010703003

Reverse / neutral position switch is turn ON when the selector lever is R or N.
ECM detects the position because the continuity of the line (the ON) exists.

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (Reverse / neutral position signal circuit is open or shorted.)
• Reverse / neutral position switch

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

INSPECTION START

Do you have CONSULT?
Do you have CONSULT?

YES

>> GO TO 2.

NO

>> GO TO 5.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.

>> GO TO 3.

3.

CHECK PNP SIGNAL FUNCTION

With CONSULT

1.

Turn ignition switch ON.

2.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Proceed to 

ECM-311, "M/T : Diagnosis Procedure"

.

4.

PERFORM DTC CONFIRMATION PROCEDURE

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0850

P-N POS SW/CIRCUIT
(Reverse / neutral switch input circuit)

The signal of reverse / neutral position switch is not changed in the process 
of engine starting and driving.

Position (Shift lever)

Known-good signal

N or P position

ON

Except above position

OFF

P0850 REVERSE/NEUTRAL POSITION SWITCH

ECM-311

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

1.

Select “DATA MONITOR” mode with CONSULT.

2.

Start engine and warm it up to normal operating temperature.

3.

Maintain the following conditions for at least 50 consecutive seconds.

CAUTION:

Always drive vehicle at a safe speed.

4.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

ECM-311, "M/T : Diagnosis Procedure"

.

NO

>> INSPECTION END

5.

PERFORM COMPONENT FUNCTION CHECK

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground as per the following conditions.

Is the inspection result normal?

YES-1 >> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

YES-2 >> Confirmation after repair: INSPECTION END
NO

>> Proceed to 

ECM-311, "M/T : Diagnosis Procedure"

.

M/T : Diagnosis Procedure

INFOID:0000000010703004

1.

CHECK REVERSE / NEUTRAL POSITION SWITCH POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect reverse / neutral position switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between reverse / neutral position switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform the trouble diagnosis for power supply circuit.

2.

CHECK REVERSE / NEUTRAL POSITION SWITCH SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between reverse / neutral position switch harness connector and ECM harness con-
nector.

ENG SPEED

1,600 - 6,375 rpm

COOLAN TEMP/S

More than 70

°

C (158

°

F)

B/FUEL SCHDL

1.7 - 31.8 msec

VHCL SPEED SE

More than 64 km/h (40 mph)

Shift lever

Suitable position

+

−

Condition

Voltage

(Approx.)

ECM

Connector

Terminal

F15

14

Ground

Selector lever

Neutral

Battery voltage

Except above

0 V

+

−

Voltage

Reverse / neutral position switch

Connector

Terminal

F100

2

Ground

Battery voltage

ECM-312

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0850 REVERSE/NEUTRAL POSITION SWITCH

4.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK REVERSE / NEUTRAL POSITION SWITCH

Check the reverse / neutral position switch. Refer to 

TM-15, "PARK/NEUTRAL POSITION (PNP) SWITCH :

Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace reverse / neutral position switch. Refer to 

TM-35, "Removal and Installation"

.

+

−

Continuity

Reverse / neutral position switch

ECM

Connector

Terminal

Connector

Terminal

F100

3

F15

14

Existed