Infiniti G35 (V35) Sedan. Manual — part 1282

STC-18

< ECU DIAGNOSIS >

[WITHOUT 4WAS]

POWER STEERING CONTROL UNIT

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-
TEM —

INFOID:0000000000958719

JCGWA0001GB

POWER STEERING CONTROL UNIT

STC-19

< ECU DIAGNOSIS >

[WITHOUT 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

JCGWA0002GB

STC-20

< ECU DIAGNOSIS >

[WITHOUT 4WAS]

POWER STEERING CONTROL UNIT

Fail Safe

INFOID:0000000000958720

EPS system

JCGWA0003GB

POWER STEERING CONTROL UNIT

STC-21

< ECU DIAGNOSIS >

[WITHOUT 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

• EPS system enters the fail-safe mode (that allows the steering

force to be controlled without impairing the drive ability) if any of
the input/output values to/from EPS system (power steering con-
trol unit) deviate from the standard range.
NOTE:
The system enters the fail-safe mode if the engine speed remains
at 1,500 rpm or more for over 10 seconds while the vehicle is
stopped. This is normal.

• The fail-safe function is canceled when a vehicle speed signal of 2

km/h (1.2 MPH) or more is inputted or the key switch is turned
OFF

→

ON. EPS system restores the normal operation at that time.

JSGIA0114GB

Function

Warn-

ing lamp

DTC No.

Detection point (malfunction part)

Malfunction part and cause

Fail-safe

function

—

—

Vehicle speed signal input

• Engine speed is 1,500 rpm or more and there is no vehicle

speed signal input for over 10 seconds during vehicle travel.

• Vehicle speed signal has abruptly dropped from 30 km/h (19

MPH) or more to 2 km/h (1.2 MPH) or less within 1.4 sec-
onds.