Nissan Frontier D22. Manual - part 513

 

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Nissan Frontier D22. Manual - part 513

 

 

POWER STEERING OIL PRESSURE SWITCH

EC-1155

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Wiring Diagram

UBS00DQN

BBWA0500E

EC-1156

[VG33E]

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 the ECM terminals, such as the ground.

Diagnostic Procedure

UBS00DQO

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 CON-
SULT-II.

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.

OK or NG

OK

>> INSPECTION END.

NG

>> GO TO 4.

TER-

MINAL 

NO.

WIRE 

COLOR

 ITEM

CONDITION

DATA (DC Voltage)

39

GY/R

Power steering oil pressure 
switch

[Engine is running]

Steering wheel is being turned

Approximately 0V

[Engine is running]

Steering wheel is not being turned

Approximately 5V

Condition

PW/ST SIGNAL

Steering is in neutral position

OFF

Steering is turned

ON

PBIB0304E

Condition

Voltage [V]

Steering is neutral position

Approx. 5

Steering is turned to full position

Approx. 0

SEF739U

POWER STEERING OIL PRESSURE SWITCH

EC-1157

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

4. 

CHECK POWER STEERING OIL PRESSURE SWITCH GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect power steering oil pressure switch harness connec-
tor.

3.

Check harness continuity between power steering oil pressure
switch terminal 2 and engine ground. Refer to Wiring Diagram.

4.

Also check harness for short to power.

OK or NG

OK

>> GO TO 5.

NG

>> Repair open circuit or short to power in harness or con-

nectors.

5. 

CHECK POWER STEERING OIL PRESSURE SWITCH INPUT SIGNAL CIRCUIT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 39 and power steering oil pressure switch terminal 1.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 6.

NG

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

6. 

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 2.

OK or NG

OK

>> GO TO 7.

NG

>> Replace power steering oil pressure switch.

7. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

Continuity should exist.

LEC521

Continuity should exist.

Conditions

Continuity

Steering wheel is being fully turned

Yes

Steering wheel is not being turned

No

SEF679W

EC-1158

[VG33E]

IACV-FICD SOLENOID VALVE

IACV-FICD SOLENOID VALVE

PFP:23781

Component Description

UBS00DQP

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

LEC515

 

 

 

 

 

 

 

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