Nissan Frontier. Manual - part 456

 

  Index      Nissan     Nissan Frontier (2014 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  454  455  456  457   ..

 

 

Nissan Frontier. Manual - part 456

 

 

P1572 ASCD BRAKE SWITCH

EC-395

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Component Inspection

INFOID:0000000009481087

BRAKE PEDAL POSITION SWITCH

1. Turn ignition switch OFF.
2. Disconnect brake pedal position switch harness connector.
3. Check continuity between brake pedal position switch terminals

1 and 2 under the following conditions.

If NG, adjust brake pedal position switch installation, refer to 

BR-

16

, and perform step 3 again.

CLUTCH PEDAL POSITION SWITCH

1. Turn ignition switch OFF.
2. Disconnect clutch pedal position switch harness connector.
3. Check continuity between clutch pedal position switch terminals

1 and 2 under the following conditions.

If NG, adjust clutch pedal position switch installation, refer to 

CL-

7, "On-Vehicle Inspection and Adjustment"

, and perform step 3

again.

STOP LAMP SWITCH

1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between stop lamp switch terminals 1 and 2 under the following conditions.

If NG, adjust stop lamp switch installation, refer to 

BR-16

, and perform step 3 again.

Condition

Continuity

Brake pedal: Fully released

Should exist

Brake pedal: Slightly depressed

Should not exist

SEC023D

Condition

Continuity

Clutch pedal: Fully released

Should exist

Clutch pedal: Slightly depressed

Should not exist

SEC024D

Condition

Continuity

Brake pedal: Fully released

Should not exist

Brake pedal: Slightly depressed

Should exist

PBIB2285E

EC-396

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P1574 ASCD VEHICLE SPEED SENSOR

P1574 ASCD VEHICLE SPEED SENSOR

Component Description

INFOID:0000000009481088

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

TM-128

 for ASCD functions.

On Board Diagnosis Logic

INFOID:0000000009481089

This self-diagnosis has the one trip detection logic.

The MIL will not light up for this self-diagnosis.

NOTE:

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

Refer to 

EC-151

.

• If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to 

EC-349

.

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

to 

EC-333

.

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

to 

EC-347

.

DTC Confirmation Procedure

INFOID:0000000009481090

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.

TESTING CONDITION:

Step 3 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.

 WITH CONSULT

1. Start engine.
2. Drive the vehicle at more than 40 km/h (25MPH).
3. Check DTC.
4. If DTC is detected, go to 

EC-396, "Diagnosis Procedure"

.

WITH GST 

Follow the procedure “WITH CONSULT” above.

Diagnosis Procedure

INFOID:0000000009481091

1.

CHECK DTC WITH TCM

Check DTC with TCM. Refer to 

TM-157, "CONSULT Function (TRANSMISSION)"

.

OK or NG

OK

>> GO TO 2.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1574
1574

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.)

• Harness or connectors

(The combination meter circuit is open or 
shorted.)

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

P1574 ASCD VEHICLE SPEED SENSOR

EC-397

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NG

>> Perform trouble shooting relevant to DTC indicated.

2.

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

Refer to 

BRC-29, "CONSULT Function (ABS)"

 (TYP1) or 

BRC-147, "CONSULT Function (ABS)"

 (TYPE 2).

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace.

3.

CHECK COMBINATION METER

Check combination meter function.

Refer to 

MWI-25

.

>> INSPECTION END

EC-398

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P1715 INPUT SPEED SENSOR

P1715 INPUT SPEED SENSOR

Description

INFOID:0000000009481092

ECM receives input speed sensor signal from TCM through CAN communication line. ECM uses this signal for

engine control.

On Board Diagnosis Logic

INFOID:0000000009481093

NOTE:

• If DTC P1715 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

Refer to 

EC-151

.

• If DTC P1715 is displayed with DTC P0607 first perform the trouble diagnosis for DTC P0607.

Refer to 

EC-349

.

• If DTC P1715 is displayed with DTC P0335, first perform the trouble diagnosis for DTC P0335. Refer

to 

EC-258

.

• If DTC P1715 is displayed with DTC P0340, first perform the trouble diagnosis for DTC P0340. Refer

to 

EC-262

.

• If DTC P1715 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer

to 

EC-347

.

The MIL will not light up for this self-diagnosis.

Diagnosis Procedure

INFOID:0000000009481094

1.

CHECK DTC WITH TCM

Check DTC with TCM. Refer to 

TM-231

.

OK or NG

OK

>> GO TO 2.

NG

>> Perform trouble shooting relevant to DTC indicated.

2.

REPLACE TCM

Replace TCM. Refer to 

TM-288, "Removal and Installation"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1715
1715

Input speed sensor
(TCM output)

Input speed sensor signal is different from 
the theoretical value calculated by ECM 
from output speed sensor signal and engine 
rpm signal.

• Harness or connectors

(The CAN communication line is open or 
shorted)

• Harness or connectors

(Input speed sensor circuit is open or 
shorted)

• TCM

 

 

 

 

 

 

 

Content   ..  454  455  456  457   ..