Nissan Frontier D22. Instruction — part 363

POWER STEERING OIL PRESSURE SWITCH

EC-555

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Wiring Diagram

UBS00DDJ

AEC012B

EC-556

[KA24DE]

POWER STEERING OIL PRESSURE SWITCH

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

UBS00DDK

1.

INSPECTION START

Do you have CONSULT-II?

Yes or No

Yes

>> GO TO 2.

No

>> GO TO 3.

2.

CHECK OVERALL FUNCTION

With CONSULT-II

1.

Start engine.

2.

Check “PW/ST SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 4.

3.

CHECK OVERALL FUNCTION

Without CONSULT-II

1.

Start engine.

2.

Check voltage between ECM terminal 39 and ground under the following conditions.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 4.

TER-

MINAL

NO.

WIRE

COLO

R

ITEM

CONDITION

DATA (DC Voltage)

39

GY/R

Power steering oil pressure
switch

[Engine is running]

●

Steering wheel is fully turned

Approximately 0V

[Engine is running]

●

Steering wheel is not turned

Approximately 5V

LEC065A

Condition

Voltage [V]

Steering wheel is turned

Approx. 0

Steering wheel is not turned

Approx. 5

SEF662P

POWER STEERING OIL PRESSURE SWITCH

EC-557

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

4.

CHECK INPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 39 and terminal 1.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 5.

NG

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

5.

CHECK POWER STEERING OIL PRESSURE SWITCH

1.

Disconnect power steering oil pressure switch harness connector then start engine.

2.

Check continuity between terminals 1 and ground.

OK or NG

OK

>> GO TO 6.

NG

>> Replace power steering oil pressure switch.

6.

CHECK INTERMITTENT INCIDENT

Perform

EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

>> INSPECTION END

Removal and Installation

UBS00EM1

POWER STEERING OIL PRESSURE SWITCH

Refer to

PS-17, "POWER STEERING OIL PUMP"

.

Continuity should exist.

Conditions

Continuity

Steering wheel is being turned

Yes

Steering wheel is not being turned

No

SEF230V

EC-558

[KA24DE]

IACV-FICD SOLENOID VALVE

IACV-FICD SOLENOID VALVE

PFP:23781

Component Description

UBS00DDL

When the air conditioner is ON, the IACV-FICD solenoid valve sup-
plies additional air to adjust to the increased load.

SEF342V