Nissan Qashqai J11. Manual - part 340

 

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Nissan Qashqai J11. Manual - part 340

 

 

P1572 BRAKE PEDAL POSITION SWITCH

ECM-337

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace brake pedal position switch. Refer to 

BR-17, "Removal and Installation"

 (LHD) 

BR-61,

"Removal and Installation"

 (RHD).

Component Inspection (Stop Lamp Switch)

INFOID:0000000010703028

1.

CHECK STOP LAMP SWITCH-1

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch harness connector.

3.

Check the continuity between stop lamp switch terminals as per the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK STOP LAMP SWITCH-2

1.

Adjust stop lamp switch installation. Refer to 

BR-18, "Inspection and Adjustment"

 (LHD) 

BR-62, "Inspec-

tion and Adjustment"

 (RHD).

2.

Check the continuity between stop lamp switch terminals as per the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace stop lamp switch. Refer to 

BR-17, "Removal and Installation"

 (LHD) 

BR-61, "Removal

and Installation"

 (RHD).

Brake pedal position switch

Condition

Continuity

+

Terminal

1

2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

Stop lamp switch

Condition

Continuity

+

Terminal

1

2

Brake pedal

Fully released

Not existed

Slightly depressed

Existed

Stop lamp switch

Condition

Continuity

+

Terminal

1

2

Brake pedal

Fully released

Not existed

Slightly depressed

Existed

ECM-338

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P1574 ASCD VEHICLE SPEED SENSOR

P1574 ASCD VEHICLE SPEED SENSOR

DTC Description

INFOID:0000000010703029

The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from combina-
tion meter, and the other is from CVT C/U. The ECM uses these signals for ASCD control. Refer to 

ECM-48,

"AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description"

 for ASCD functions.

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (CAN communication line is open or shorted.)
• Combination meter
• Wheel sensor
• ABS actuator and electric unit (control unit)
• ECM
• TCM

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P1574 is displayed with DTC U1001, P0500, P0605 or P0607, first perform the trouble diagnosis for
DTC U1001, P0500, P0605 or P0607.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-93, "DTC Index"

.

NO

>> GO TO 2.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 3.

3.

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

>> Proceed to 

ECM-339, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P1574

ASCD VHL SPD SEN
(ASCD vehicle speed sensor)

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

P1574 ASCD VEHICLE SPEED SENSOR

ECM-339

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

Diagnosis Procedure

INFOID:0000000010703030

1.

CHECK DTC PRIORITY

If DTC P1574 is displayed with DTC U1001, P0500, P0605 or P0607, first perform the trouble diagnosis for
DTC U1001, P0500, P0605 or P0607.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-93, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK DTC WITH TCM

Check DTC with TCM. Refer to 

TM-267, "DTC Index"

 or 

TM-251, "CONSULT Function"

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Perform trouble shooting relevant to DTC indicated.

3.

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

Check DTC with ABS actuator and electric unit (control unit). Refer to 

BRC-53, "DTC Index"

 or 

BRC-42,

"CONSULT Function"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Perform trouble shooting relevant to DTC indicated.

4.

CHECK DTC WITH COMBINATION METER

Check DTC with combination meter. Refer to 

MWI-29, "CONSULT Function (METER/M&A)"

.

>> INSPECTION END

ECM-340

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P1805 BRAKE SWITCH

P1805 BRAKE SWITCH

DTC Description

INFOID:0000000010703031

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (Stop lamp switch circuit is open or shorted.)
• Stop lamp switch

FAIL-SAFE

ECM controls the electric throttle control actuator by regulating the throttle opening to a small range. There-
fore, acceleration will be poor.

DTC CONFIRMATION PROCEDURE

1.

PERFORM COMPONENT FUNCTION CHECK

1.

Turn ignition switch ON.

2.

Fully depress the brake pedal for at least 5 seconds.

3.

Erase the DTC. Refer to 

ECM-63, "On Board Diagnosis Function"

.

4.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

ECM-340, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010703032

1.

CHECK STOP LAMP SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Depress the brake pedal and check the stop lamp when releasing.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK STOP LAMP SWITCH POWER SUPPLY

1.

Disconnect stop lamp switch harness connector.

2.

Check the voltage between stop lamp switch harness connector and ground.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P1805

BRAKE SW/CIRCUIT
(Brake switch circuit)

A stop lamp switch switch signal is not sent to ECM for extremely long time 
while the vehicle is driving.

Vehicle condition

Driving condition

When engine is idling

Normal

When accelerating

Poor acceleration

Brake pedal

Stop lamp

Fully released

Not illuminated

Slightly depressed

Illuminated

 

 

 

 

 

 

 

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