Nissan Qashqai (2007-2010). Manual - part 342

P1574 ASCD VEHICLE SPEED SENSOR

EC-887

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

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EC

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P1574 ASCD VEHICLE SPEED SENSOR

Description

INFOID:0000000001089473

The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from combina-
tion meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD
control. Refer to 

EC-677, "System Description"

 for ASCD functions.

DTC Logic

INFOID:0000000001089474

DTC DETECTION LOGIC

NOTE:
• If DTC P1574 is displayed with DTC U1001, first perform the trouble diagnosis for DTC U1001. Refer

to 

EC-740, "DTC Logic"

.

• If DTC P1574 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer

to 

EC-741, "DTC Logic"

.

• If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer

to 

EC-825, "DTC Logic"

• If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer

to 

EC-827, "DTC Logic"

DTC CONFIRMATION PROCEDURE

1.

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 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine.

2.

Drive the vehicle at more than 40 km/h (25 MPH).

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.
If a road test is expected to be easier, it is unnecessary to lift the vehicle.

3.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-890, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001089475

1.

CHECK DTC WITH TCM

Check DTC with TCM. Refer to 

TM-214, "Diagnosis Description"

.

Is the inspection result normal?

YES

>> GO TO 2.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1574

ASCD vehicle speed 
sensor

ECM detects a difference between two vehicle 
speed signals is out of the specified range.

• Harness or connectors

(The CAN communication line is open or 
shorted.)
(Combination meter circuit is open or shorted.)

• Combination meter
• ABS actuator and electric unit (control unit)
• Wheel sensor
• TCM (CVT models)
• ECM

EC-888

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

P1574 ASCD VEHICLE SPEED SENSOR

NO

>> Perform trouble shooting relevant to DTC indicated.

2.

CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”

Refer to 

BRC-17, "CONSULT-III Function (ABS)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace.

3.

CHECK COMBINATION METER

Check combination meter function.
Refer to 

MWI-23, "CONSULT-III Function (METER/M&A)"

.

>> INSPECTION END

P1706 PNP SWITCH

EC-889

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

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P1706 PNP SWITCH

Description

INFOID:0000000001089476

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

DTC Logic

INFOID:0000000001089477

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

INSPECTION START

Do you have CONSULT-III?
Do you have CONSULT-III?

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 SWITCH FUNCTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

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.

NO

>> Go to 

EC-893, "Diagnosis Procedure"

.

4.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Select “DATA MONITOR” mode with CONSULT-III.

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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1706

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

Position (Shift lever)

Known-good signal

N or P position (CVT)
Neutral position (M/T)

ON

Except above position

OFF

ENG SPEED

CVT: 1,500 - 6,375 rpm
M/T: 1,500 - 6,375 rpm

COOLAN TEMP/S

More than 70

°

C (158

°

F)

EC-890

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

P1706 PNP SWITCH

4.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-893, "Diagnosis Procedure"

.

NO

>> INSPECTION END

5.

PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to 

EC-893, "Component Function Check"

.

NOTE:
Use component function check the overall function of the park/neutral position (PNP) switch circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-893, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000001089478

1.

PERFORM COMPONENT FUNCTION CHECK

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-893, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001089479

1.

CHECK PNP SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect Park/neutral position (PNP) switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between PNP switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

DTECTED MALFUNCTIONING PART

Check the following.
• Harness connectors E6, F123

B/FUEL SCHDL

CVT: 2.4 - 31.8 msec
M/T: 3.5 - 31.8 msec

VHCL SPEED SE

More than 64 km/h (40 mph)

Shift lever

Suitable position

ECM

Ground

Condition

Voltage

Connector

Terminal

F8

69

(PNP switch signal)

Ground

Shift lever

P or N (CVT)
Neutral (M/T)

Approx. 0V

Except above

BATTERY VOLTAGE

PNP switch

Ground

Voltage

Connector

Terminal

F21 (CVT)

7

Ground

Battery voltage

F46 (M/T 2W)

2

F48 (M/T 4W)

2