Nissan Pathfinder. Manual - part 520

EC-386

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1574 ASCD VEHICLE SPEED SENSOR

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform trouble shooting relevant to DTC indicated.

2.

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

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

BRC-32, "CONSULT Function"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK COMBINATION METER FUNCTION

Check combination meter function. Refer to 

MWI-19, "CONSULT Function (METER/M&A)"

.

>> INSPECTION END

P1700 CVT CONTROL SYSTEM

EC-387

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P1700 CVT CONTROL SYSTEM

Description

INFOID:0000000009178307

This DTC is displayed with other DTC regarding TCM. Perform the trouble diagnosis for corresponding DTC.

Refer to 

EC-91, "DTC Index"

. When this DTC is detected, the ASCD control is canceled.

EC-388

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1715 INPUT SPEED SENSOR (PRIMARY SPEED SENSOR)

P1715 INPUT SPEED SENSOR (PRIMARY SPEED SENSOR)

Description

INFOID:0000000009178308

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

engine control.

DTC Logic

INFOID:0000000009178309

DTC DETECTION LOGIC

NOTE:

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

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

to 

EC-282, "DTC Logic"

.

• If DTC P1715 is displayed with DTC P0340, P0345, first perform the trouble diagnosis for DTC P0340,

P0345. Refer to 

EC-285, "DTC Logic"

.

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

to 

EC-351, "DTC Logic"

.

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

to 

EC-353, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing 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 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine.

2. Drive vehicle at a speed of more than 50 km/h (31 MPH) for at least 5 seconds.

3. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-389, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178310

1.

CHECK DTC WITH TCM

Check DTC with TCM. Refer to 

TM-60, "DTC Index"

.

Is the inspection result normal?

YES

>> Replace TCM. Refer to 

TM-195, "Removal and Installation"

.

NO

>> Perform trouble shooting relevant to DTC indicated.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1715

IN PULY SPEED 
[Input speed sensor (Pri-
mary 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

P1800 VIAS CONTROL SOLENOID VALVE 1

EC-389

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P1800 VIAS CONTROL SOLENOID VALVE 1

DTC Logic

INFOID:0000000009178311

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing 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.

TESTING CONDITION:

Before performing the following procedure, confirm battery voltage is more than 11 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for at least 5 seconds.

2. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-390, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178312

1.

CHECK VIAS CONTROL SOLENOID VALVE 1 POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect VIAS control solenoid valve 1 harness connector.

3. Turn ignition switch ON.

4. Check the voltage between VIAS control solenoid valve 1 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK VIAS CONTROL SOLENOID VALVE 1 OUTPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between VIAS control solenoid valve 1 harness connector and ECM harness con-

nector.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1800

VIAS S/V CIRC-B1
(VIAS solenoid valve circuit bank 1)

An excessively low or high voltage signal 
is sent to ECM through the VIAS control 
solenoid valve 1.

• Harness or connectors

(The solenoid valve 1 circuit is open 
or shorted.)

• VIAS control solenoid valve 1

VIAS control solenoid valve 1

Ground

Voltage

Connector

Terminal

F66

1

Ground

Battery voltage