Infiniti QX56 (Z62). Manual - part 1266

 

  Index      Infiniti     Infiniti QX56 (Z62) - service repair manual 2011 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  1264  1265  1266  1267   ..

 

 

Infiniti QX56 (Z62). Manual - part 1266

 

 

STC-16

< DTC/CIRCUIT DIAGNOSIS >

POWER STEERING SOLENOID VALVE

POWER STEERING SOLENOID VALVE

Component Function Check

INFOID:0000000006256126

1.

CHECK POWER STEERING SOLENOID VALVE OPERATION

Check changes in steering force from a halt condition to high-speed driving.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Check the power steering solenoid valve. Refer to 

STC-16, "Diagnosis Procedure"

Diagnosis Procedure 

INFOID:0000000006256127

1.

CHECK POWER STEERING SOLENOID VALVE SIGNAL

1.

Turn the ignition switch OFF.

2.

Check the voltage between power steering control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN POWER STEERING SOLENOID VALVE AND POWER STEERING CON-

TROL UNIT

1.

Turn the ignition switch OFF.

2.

Disconnect power steering solenoid valve harness connector.

3.

Disconnect power steering control unit harness connector.

4.

Check the continuity between power steering solenoid valve harness connector and the power steering
control unit harness connector.

5.

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

Is the inspection result normal?

 YES

>> GO TO 3.

 NO

>> Repair or replace error-detected parts.

3.

CHECK POWER STEERING SOLENOID VALVE

Check the power steering solenoid valve. Refer to 

STC-17, "Component Inspection"

Is the inspection result normal?

 YES

>> GO TO 4.

 NO

>> Replace gear-sub assembly. Refer to 

ST-43, "Disassembly and Assembly"

.

Power steering control unit

Condition

Voltage (Approx.)

Connector

Terminal

M108

 1 

Ground

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

Power steering solenoid valve

Power steering control unit

Continuity

Connector

Terminal

Connector

Terminal

F45

1

M108

1

Existed

2

5

Existed

Power steering control unit

Continuity

Connector

Terminal

M108

1

Ground

Not existed

5

POWER STEERING SOLENOID VALVE

STC-17

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

4.

CHECK TERMINALS AND HARNESS CONNECTORS

• Check the power steering control unit pin terminals for damage or loose connection with harness connector.
• Check the power steering solenoid valve pin terminals for damage or loose connection with harness connec-

tor.

Is the inspection result normal?

YES

>> Replace power steering control unit. Refer to 

STC-23, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

Component Inspection 

INFOID:0000000006256128

1.

CHECK POWER STEERING SOLENOID VALVE

1.

Turn the ignition switch OFF.

2.

Disconnect power steering solenoid valve harness connector.

3.

Check resistance between power steering solenoid valve connector terminals.

4.

Check power steering solenoid valve by listening for its operation sound while applying battery voltage to
power steering solenoid valve connector terminals 1 (positive) and 2 (negative).

Is the inspection result normal?

 YES

>> INSPECTION END

 NO

>> Replace gear-sub assembly. Refer to 

ST-43, "Disassembly and Assembly"

.

Power steering solenoid valve

Resistance (Approx.)

Terminal

2

4 – 6 

STC-18

< DTC/CIRCUIT DIAGNOSIS >

ENGINE SPEED SIGNAL CIRCUIT

ENGINE SPEED SIGNAL CIRCUIT

Diagnosis Procedure

INFOID:0000000006256129

1.

PERFORM ECM SELF-DIAGNOSIS

With CONSULT-III

Perform “ENGINE” self-diagnosis.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

EC-98, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN ECM AND POWER STEERING CONTROL UNIT

1.

Turn the ignition switch OFF.

2.

Disconnect ECM harness connectors.

3.

Disconnect power steering control unit harness connector.

4.

Check the continuity between ECM harness connector and power steering control unit harness connector.

5.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK ENGINE SPEED SIGNAL (ECM)

1.

Connect ECM harness connectors.

2.

Check the signal between ECM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace ECM. Refer to 

EC-143, "Description"

.

ECM

Power steering control unit

Continuity

Connector

Terminal

Connector

Terminal

E80

169

M108

10

Existed

Power steering control unit

Continuity

Connector

Terminal

M108

10

Ground

Not existed

ECM

Condition

Voltage (Approx.)

Connector

Terminal

E80

169

Ground

Engine is running
• Warm-up condition
• Idle speed

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

JPBIA3352ZZ

JPBIA3354ZZ

ENGINE SPEED SIGNAL CIRCUIT

STC-19

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

4.

CHECK ENGINE SPEED SIGNAL (POWER STEERING CONTROL UNIT)

1.

Turn the ignition switch OFF.

2.

Connect power steering control unit harness connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace power steering control unit. Refer to 

STC-23, "Removal and Installation"

.

5.

CHECK TERMINALS AND HARNESS CONNECTORS

• Check the power steering control unit pin terminals for damage or loose connection with harness connector.
• Check the ECM pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace error-detected parts.

Power steering control unit

Condition

Voltage (Approx.)

Connector

Terminal

M108

10

Ground

Engine is running
• Warm-up condition
• Idle speed

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

JPBIA3352ZZ

JPBIA3354ZZ

 

 

 

 

 

 

 

Content   ..  1264  1265  1266  1267   ..