Nissan Rogue. Manual - part 1145

STC-10

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (EPS CONTROL UNIT)

*1: Almost in accordance with the value of “MOTOR SIG”. It is not a malfunction though these values are not

accorded when steering quickly.

*2: Normally displays 100%. In case of an excessive stationary steering, the assist curvature gradually falls.

However, it returns to 100% when left standing.

*3: It is not a malfunction, though it might not be corresponding just after ignition switch in turned ON.

EPS CONTROL UNIT

STC-11

< ECU DIAGNOSIS INFORMATION >

C

D

E

F

H

I

J

K

L

M

A

B

STC

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O

P

ECU DIAGNOSIS INFORMATION

EPS CONTROL UNIT

Reference Value

INFOID:0000000011279643

VALUES ON THE DIAGNOSIS TOOL

CAUTION:

The output signal indicates the EPS control unit calculation data. The normal values will be displayed

even in the event that the output circuit (harness) is open.

NOTE:

The following table includes information (items) inapplicable to this vehicle: For information (items) applicable

to this vehicle, refer to CONSULT display items.

*1: Almost in accordance with the value of “MOTOR SIG”. It is not a malfunction though these values are not

accorded when steering quickly.

*2: Normally displays 100%. In case of an excessive stationary steering, the assist curvature gradually falls.

However, it returns to 100% when left standing.

*3: It is not a malfunction, though it might not be corresponding just after ignition switch in turned ON.

Monitor item 

Data monitor

Condition

Display value

BATTERY VOLT

Ignition switch: ON

Battery voltage

TORQUE SENSOR

Engine running

Steering wheel: Not steering (There is 
no steering force)

Approx. 0 Nm

Steering wheel: Right turn

Positive value (Nm)

Steering wheel: Left turn

Negative value (Nm)

MOTOR CURRENT

Engine running

Steering wheel: Not steering (There is 
no steering force)

Approx. 0 A

Steering wheel: Right or left turn

Displays consumption current of 
EPS motor (A)

*1

MOTOR SIG

Engine running

Steering wheel: Not steering (There is 
no steering force)

Approx. 0 A

Steering wheel: Right turn

Positive value (A)

Steering wheel: Left turn

Negative value (A)

ASSIST TORQUE

Engine running

Steering wheel: Not steering (There is 
no steering force)

Approx. 0 Nm

Steering wheel: Right or left turn

Displays assist torque of EPS motor 
(Nm)

C/U TEMP

Ignition switch ON or engine running

Displays temperature of inside of 
EPS control unit (

°C) or (°F)

ASSIST LEVEL

Engine running

100 % 

*2

VEHICLE SPEED

Vehicle stopped

0 km/h (0 mph)

While driving

Approximately equal to the indication 
on speedometer

*3

(inside of 

±10%)

WARNING LAMP

EPS warning lamp: ON

On

EPS warning lamp: OFF

Off

ENGINE STATUS

Engine not running

Stop

Engine running

Run

STC-12

< ECU DIAGNOSIS INFORMATION >

EPS CONTROL UNIT

TERMINAL LAYOUT

PHYSICAL VALUES

ALGIA0173ZZ

Terminal No.

(Wire Color)

Description

Condition

Value

(Approx.)

+

−

Signal name

Input/Output

1

(P)

—

CAN low

Input/Output

—

—

2

(L)

—

CAN high

Input/Output

—

—

4

(SB)

Ground

Ignition power supply

Input

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

9

(R)

Ground

Battery power supply

Input

Always

Battery voltage

10

(B)

Ground

Ground

—

Always

0 V

11

(B)

Ground

Torque sensor ground

Input

Always

0 V

12

(Y)

Ground

Torque sub sensor 
signal

Input

Ignition switch: ON

Steering wheel: Not 
steering (There is no 
steering force)

 2.5 V

Engine running

Steering wheel: steer-
ing

1.6 V – 3.4 V

(The value is changed 

according to steering 

left or right)

14

(R)

Ground

Torque sensor power 
supply

Output

Ignition switch: ON

10 V

15

(G)

Ground

Torque main sensor 
signal

Input

Ignition switch: ON

Steering wheel: Not 
steering (There is no 
steering force)

 2.5 V

Engine running

Steering wheel: steer-
ing

1.6 V – 3.4 V

(The value is changed 

according to steering 

left or right)

17

(W)

Ground

Torque sensor refer-
ence voltage

Output

Ignition switch: ON

3.3 V

19

(W)

Ground

Reference signal R1

Input

Ignition switch: ON

Steering wheel: Not 
steering (There is no 
steering force)

—

Engine running

Steering wheel: steer-
ing

—

21

(B)

Ground

Ground

—

Always

0 V

EPS CONTROL UNIT

STC-13

< ECU DIAGNOSIS INFORMATION >

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Fail-Safe

INFOID:0000000011279644

• If any malfunction occurs in the system and the control unit detects the malfunction, the EPS warning lamp in

the combination meter turns ON to indicate system malfunction.

• When EPS warning lamp is ON, the system enters into a manual steering state. (turning force at steering

wheel becomes heavy.)

• Under abnormal vehicle speed signal conditions, vehicle speed is judged as constant.

Protection Function

INFOID:0000000011279645

EPS control unit decreases the output signal to EPS motor during continuous extreme use of the power steer-

ing function (e.g., full steering) for protection of the EPS motor and EPS control unit (Overload protection con-

trol).

DTC Inspection Priority Chart

INFOID:0000000011279646

When multiple DTCs are detected simultaneously, check one by one depending on the following priority list:

DTC Index

INFOID:0000000011279647

24

(Y)

Ground

Position signal S2 
(Sine)

Input

Ignition switch: ON

Steering wheel: Not 
steering (There is no 
steering force)

—

Engine running

Steering wheel: steer-
ing

—

26

(R)

Ground

Position signal S (Co-
sine)

Input

Ignition switch: ON

Steering wheel: Not 
steering (There is no 
steering force)

—

Engine running

Steering wheel: steer-
ing

—

Terminal No.

(Wire Color)

Description

Condition

Value

(Approx.)

+

−

Signal name

Input/Output

Priority

Priority order item (DTC)

1

U1000 CAN COMM CIRCUIT

2

C1609 CAN VHCL SPEED

3

C1601 BATTERY VOLT

4

Other than the above

DTC

Items (CONSULT screen terms)

Reference

C1601

BATTERY VOLT

STC-20, "DTC Logic"

C1604

TORQUE SENSOR

STC-23, "DTC Logic"

C1606

EPS MOTOR

STC-24, "DTC Logic"

C1607

EEPROM

STC-25, "DTC Logic"

C1608

CONTROL UNIT

STC-25, "DTC Logic"

C1609

CAN VHCL SPEED

STC-26, "DTC Logic"

U1000

CAN COMM CIRCUIT

STC-27, "DTC Logic"