Nissan Altima L32. Manual - part 1399

POWER STEERING CONTROL UNIT

STC-15

< ECU DIAGNOSIS >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

ECU DIAGNOSIS

POWER STEERING CONTROL UNIT

Reference Value

INFOID:0000000004205836

TERMINAL LAYOUT

PHYSICAL VALUES

JSGIA0023ZZ

Terminal No.

Wire 

color

Description

Condition

Value (Approx.)

+

-

Signal name

Input/

Output

1

Ground

R/Y

Power steering so-
lenoid valve voltage

Output

Vehicle speed: 0 km/h (0 MPH)
(Engine is running)

4.4 - 6.6 V

Vehicle speed: 100 km/h (62 MPH)

2.5 - 3.7 V

3

Ground

G

Ignition power sup-
ply

Input

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

5

Ground

LG/W

Power steering so-
lenoid valve ground

—

Always

0  V

6

Ground

B

Ground

—

Always

0 V

8

Ground

L/B

Vehicle speed sig-
nal

Input

Vehicle speed: 40 km/h (25 MPH)

CAUTION:

Check air pressure of tire under 
standard condition.

ELF1080D

STC-16

< ECU DIAGNOSIS >

POWER STEERING CONTROL UNIT

CAUTION:

When using circuit tester or oscilloscope to measure voltage for inspection, be sure not to extend forcibly any connector ter-
minals.

Wiring Diagram — ELECTRONICALLY CONTROLLED POWER STEERING SYS-

10

Ground

V/W

Engine speed sig-
nal

Input

Engine speed: At idle
(Warm-up condition)

QR25DE:

VQ35DE:

Engine speed: Approx. 2,000 rpm
(Warm-up condition)

QR25DE:

VQ35DE:

Terminal No.

Wire 

color

Description

Condition

Value (Approx.)

+

-

Signal name

Input/

Output

JSGIA0144ZZ

JSGIA0143ZZ

JSGIA0145ZZ

PBIA3655J

POWER STEERING CONTROL UNIT

STC-17

< ECU DIAGNOSIS >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

TEM —

INFOID:0000000004205837

ALGWA0001GB

STC-18

< ECU DIAGNOSIS >

POWER STEERING CONTROL UNIT

ABGIA0011GB