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Nissan Pathfinder (2005 year). Manual - part 220

DTC P1572 ASCD BRAKE SWITCH

EC-611

2005 Pathfinder

11.

CHECK INTERMITTENT INCIDENT

Refer to

EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END

EC-612

DTC P1572 ASCD BRAKE SWITCH

2005 Pathfinder

Component Inspection

UBS00KG8

ASCD BRAKE SWITCH

Turn ignition switch OFF.

Disconnect ASCD brake switch harness connector.

Check harness continuity between ASCD brake switch terminals
1 and 2 under the following conditions.

If NG, adjust ASCD brake switch installation, refer to

BR-6,

"BRAKE PEDAL"

, and perform step 3 again.

STOP LAMP SWITCH

Turn ignition switch OFF.

Disconnect stop lamp switch harness connector.

Check harness continuity between stop lamp switch terminals 1
and 2 under the following conditions.

If NG, adjust stop lamp switch installation, refer to

BR-6,

"BRAKE PEDAL"

, and perform step 3 again.

Condition

Continuity

When brake pedal is fully released.

Should exist.

When brake pedal is slightly depressed.

Should not exist.

SEC023D

Condition

Continuity

When brake pedal is fully released.

Should not exist.

When brake pedal is slightly depressed.

Should exist.

PBIB1185E

DTC P1574 ASCD VEHICLE SPEED SENSOR

EC-613

2005 Pathfinder

DTC P1574 ASCD VEHICLE SPEED SENSOR

PFP:31036

Component Description

UBS00KG9

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-30, "AUTOMATIC SPEED CONTROL DEVICE (ASCD)"

for ASCD functions.

On Board Diagnosis Logic

UBS00KGA

This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.

NOTE:

●

If DTC P1574 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to

EC-167

●

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

EC-385

●

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

EC-396

DTC Confirmation Procedure

UBS00KGB

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-II

Start engine.

Select “DATA MONITOR” mode with CONSULT-II.

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

If DTC is detected, go to

EC-614, "Diagnostic Procedure"

WITH GST

Follow the procedure “WITH CONSULT-II” above.

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.)

●

Combination meter

●

ABS actuator and electric unit (control unit)

●

Wheel sensor

●

TCM

●

ECM

SEF058Y

EC-614

DTC P1574 ASCD VEHICLE SPEED SENSOR

2005 Pathfinder

Diagnostic Procedure

UBS00KGC

CHECK DTC WITH TCM

Check DTC with TCM. Refer to

AT-41, "TROUBLE DIAGNOSIS"

OK or NG

>> GO TO 2.

>> Perform trouble shooting relevant to DTC indicated.

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

Refer to

BRC-12, "TROUBLE DIAGNOSIS"

OK or NG

>> GO TO 3.

>> Repair or replace.

CHECK DTC WITH COMBINATION METER

Refer to

DI-4, "COMBINATION METERS"

>> INSPECTION END

DTC P1706 PNP SWITCH

EC-615

2005 Pathfinder

DTC P1706 PNP SWITCH

PFP:32006

Component Description

UBS00KGD

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

CONSULT-II Reference Value in Data Monitor Mode

UBS00KGE

Specification data are reference values.

On Board Diagnosis Logic

UBS00KGF

DTC Confirmation Procedure

UBS00KGG

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.

WITH CONSULT-II

Turn ignition switch ON.

Select “P/N POSI SW” in “DATA MONITOR” mode with CON-
SULT-II. Then check the “P/N POSI SW” signal under the follow-
ing conditions.

If NG, go to

EC-618, "Diagnostic Procedure"

If OK, go to following step.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and warm it up to normal operating temperature.

Maintain the following conditions for at least 60 consecutive sec-
onds.

If 1st trip DTC is detected, go to

EC-618, "Diagnostic Procedure"

MONITOR ITEM

CONDITION

SPECIFICATION

P/N POSI SW

●

Ignition switch: ON

Shift lever: P or N

Shift lever: Except above

OFF

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1706
1706

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

●

Combination meter

●

TCM

Position (Selector lever)

Known-good signal

P or N position

Except above position

OFF

ENG SPEED

1,400 - 6,375 rpm

COOLAN TEMP/S

More than 70

C (158

B/FUEL SCHDL

2.0 - 31.8 msec

VHCL SPEED SE

More than 64 km/h (40 MPH)

Selector lever

Suitable position

SEF212Y

SEF213Y

EC-616

DTC P1706 PNP SWITCH

2005 Pathfinder

Overall Function Check

UBS00KGH

Use this procedure to check the overall function of the park/neutral position (PNP) switch circuit. During this
check, a 1st trip DTC might not be confirmed.

WITH GST

Turn ignition switch ON.

Check voltage between ECM terminal 102 (PNP switch signal)
and ground under the following conditions.

If NG, go to

EC-618, "Diagnostic Procedure"

Condition (Gear position)

Voltage V (Known-good data)

P or N position

Approx. 0

Except above position

BATTERY VOLTAGE

(11 - 14V)

MBIB0043E

DTC P1706 PNP SWITCH

EC-617

2005 Pathfinder

Wiring Diagram

UBS00KGI

BBWA1767E

EC-618

DTC P1706 PNP SWITCH

2005 Pathfinder

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

UBS00KGJ

CHECK DTC WITH TCM

Refer to

AT-41, "TROUBLE DIAGNOSIS"

OK or NG

>> GO TO 2.

>> Repair or replace.

CHECK STARTING SYSTEM

Turn ignition switch OFF, then turn it to START.
Does starter motor operate?

Yes or No

Yes

>> GO TO 3.

>> Refer to

SC-10, "STARTING SYSTEM"

CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I

Turn ignition switch OFF.

Disconnect A/T assembly harness connector.

Disconnect combination meter harness connector.

Check harness continuity between A/T assembly terminal 9 and combination meter terminal 17.
Refer to Wiring Diagram.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 5.

>> GO TO 4.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M31, E152

●

Harness connectors E5, F14

●

Harness for open or short between A/T assembly and combination meter.

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

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

102

PNP switch

[Ignition switch: ON]

●

Shift lever: P or N

Approximately 0V

[Ignition switch: ON]

●

Except above position

BATTERY VOLTAGE
(11 - 14V)

Continuity should exist.

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