Nissan Murano Z51. Manual - part 1405

VEHICLE SPEED SIGNAL CIRCUIT

STC-11

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

VEHICLE SPEED SIGNAL CIRCUIT

Description

INFOID:0000000005515251

Combination meter sends vehicle speed signal to power steering control unit.

Diagnosis Procedure

INFOID:0000000005515252

1.

PERFORM COMBINATION METER SELF-DIAGNOSIS

With CONSULT-III

1.

Turn the ignition switch ON.

CAUTION:

Never start the engine

2.

Perform “METER/M&A” self-diagnosis. Refer to 

MWI-34, "CONSULT-III Function (METER/M&A)"

.

Is any DTC detected?

YES

>> Check the DTC.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT

1.

Turn the ignition switch OFF.

2.

Disconnect combination meter harness connector.

3.

Disconnect power steering control unit harness connector.

4.

Check continuity between combination meter harness connector and power steering control unit harness
connector.

5.

Check continuity between power steering control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK VEHICLE SPEED SIGNAL (1)

1.

Turn the ignition switch OFF.

2.

Connect combination meter harness connector.

3.

Check combination meter input/output standard values. Refer to 

MWI-58, "Reference Value"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace combination meter Refer to 

MWI-103, "Exploded View"

.

4.

CHECK VEHICLE SPEED SIGNAL (2)

1.

Turn the ignition switch OFF.

2.

Connect power steering control unit harness connector.

3.

Check signal between power steering control unit harness connector and ground with oscilloscope.

Combination meter

Power steering control unit

Continuity

Connector

Terminal

Connector

Terminal

M34

30

M61

8

Existed

Power steering control unit

—

Continuity

Connector

Terminal

M61

8

Ground

Not existed

STC-12

< DTC/CIRCUIT DIAGNOSIS >

VEHICLE SPEED SIGNAL CIRCUIT

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace power steering control unit. Refer to 

STC-21, "Removal and Installation"

.

5.

CHECK TERMINALS AND HARNESS CONNECTORS

• Check power steering control unit pin terminals for damage or loose connection with harness connector.
• Check combination meter pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace damaged parts.

Power steering control unit

—

Condition

Voltage (Approx.)

Connector

Terminal

M61

 8

Ground

Vehicle speed: 40 km/h (25 MPH)

CAUTION:

Check air pressure of tire under 
standard condition.

JSNIA0015GB

POWER STEERING CONTROL UNIT

STC-13

< ECU DIAGNOSIS INFORMATION >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

ECU DIAGNOSIS INFORMATION

POWER STEERING CONTROL UNIT

Reference Value

INFOID:0000000005515253

TERMINAL LAYOUT

PHYSICAL VALUES

JSGIA0023ZZ

Terminal No.

(Wire color)

Description

Condition

Value (Approx.)

+

-

Signal name

Input/

Output

1

(Y)

Ground

Power steering solenoid 
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)

2.4 – 3.6 V

3

(G)

Ground

Ignition switch power 
supply

Input

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

5

(LG)

Ground

Power steering solenoid 
valve ground

—

Always

0  V

6

(B)

Ground

Ground

—

Always

0 V

8

(P)

Ground

Vehicle speed signal

Input

Vehicle speed: 40 km/h (25 MPH)

CAUTION:

Check air pressure of tire under 
standard condition.

10

(V)

Ground

Engine speed signal

Input

Engine is running
• Warm-up condition
• Idle speed

Engine is running
• Warm-up condition
• Engine speed: Approx. 2,000 rpm

JSNIA0015GB

JMBIA0076GB

JMBIA0077GB

STC-14

< ECU DIAGNOSIS INFORMATION >

POWER STEERING CONTROL UNIT

CAUTION:

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

Wiring Diagram - ELECTRONICALLY CONTROLLED POWER STEERING SYSTEM -

INFOID:0000000005515254

JCGWM0180GB