Infiniti QX56 (JA60). Manual - part 814

 

  Index      Infiniti     Infiniti QX56 (JA60) - service repair manual 2010 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  812  813  814  815   ..

 

 

Infiniti QX56 (JA60). Manual - part 814

 

 

COMPRESSOR MOTOR RELAY

SCS-21

< COMPONENT DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

1. Turn ignition switch OFF.

2. Disconnect suspension control unit connector B3.

3. Check continuity between suspension control unit connector B3

(A) terminal 1 and compressor motor relay connector E130 (B)

terminal 2.

4. Check continuity between suspension control unit connector B3

(A) terminal 1 and ground.

Are the continuity test results as specified?

YES

>> Replace the suspension control unit. Refer to 

RSU-26, "Removal and Installation"

.

NO

>> Repair harness or connector. 

3.

CHECK COMPRESSOR MOTOR RELAY GROUND

1. Turn ignition switch OFF.

2. Check continuity between compressor motor relay connector

E130 terminal 1 and ground.

Is continuity present?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK COMPRESSOR MOTOR RELAY POWER SUPPLY

1. Disconnect compressor motor relay connector E131.

2. Check voltage between compressor motor relay E131 terminal 5

and ground.

Is battery voltage present?

YES

>> GO TO 5.

NO

>> Inspect fuse and repair harness or connector.

5.

CHECK COMPRESSOR MOTOR RELAY OUTPUT

A

B

Continuity

Connector

Terminal

Connector

Terminal

B3

1

E130

2

Yes

A

Continuity

Connector

Terminal

B3

1

Ground

No

ALEIA0031GB

Connector

Terminal

Continuity

E130

1

Ground

Yes

ALEIA0032GB

(+)

(-)

Voltage

Connector

Terminal

E131

5

Ground

Battery voltage

ALEIA0033GB

SCS-22

< COMPONENT DIAGNOSIS >

COMPRESSOR MOTOR RELAY

1. Connect compressor motor relay connectors E130 and E131.

2. Disconnect suspension air compressor connector C9.

3. Turn ignition ON.

4. Select "COMPRESSOR" of AIR LEVELIZER active test items.

5. Check voltage between compressor motor relay C9 terminal 4

and ground.

Is battery voltage present?

YES

>> Compressor motor relay is functioning properly.

NO

>> GO TO 6.

6.

CHECK AIR COMPRESSOR POWER SUPPLY CIRCUIT

Check the air compressor power supply circuit.  Refer to 

SCS-17, "SUSPENSION AIR COMPRESSOR : Diag-

nosis Procedure"

.

Does the power supply circuit test OK?

YES

>> Replace the compessor motor relay.

NO

>> Repair harness or connector.

(+)

(-)

Voltage

Connector

Terminal

C9

4

Ground

Battery voltage

ALEIA0034GB

HEIGHT SENSOR SIGNAL CIRCUIT

SCS-23

< COMPONENT DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

HEIGHT SENSOR SIGNAL CIRCUIT

Description

INFOID:0000000005148181

Supplies vehicle height input to the suspension control unit.

Component Function Check

INFOID:0000000005148182

1.

CHECK HEIGHT SENSOR OPERATION

CONSULT-III

1. Select "HEIGT SEN" of AIR LEVELIZER data monitor test item.

2. While monitoring test item, add or take away weight from the rear of the vehicle. Check that the voltage

value changes with vehicle height.

Is the HEIGHT SEN data monitor responding normally?

YES

>> Height sensor is operating normally.

NO

>> Refer to 

SCS-23, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000005148183

Regarding Wiring Diagram information, refer to 

SCS-29, "Wiring Diagram"

.

1.

CHECK HEIGHT SENSOR POWER AND GROUND SUPPLY

Check height sensor power and ground supply. Refer to 

SCS-18, "HEIGHT SENSOR : Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK HEIGHT SENSOR SIGNAL CIRCUIT

1. Disconnect suspension control unit connector B3 and height

sensor connector C8.

2. Check continuity between suspension control unit connector B3

(A) terminal 3 and height sensor connector C8 (B) terminal 2.

3. Check continuity between display unit harness connector B3 (A)

terminal 3 and ground.

Are the continuity results as specified?

YES

>> Replace the height sensor. Refer to 

RSU-27, "Removal and Installation"

.

NO

>> Repair harness or connector.

HEIGHT SEN

: Voltage changes with vehicle height

A

B

Continuity

Connector

Terminal

Connector

Terminal

B3

3

C8

2

Yes

A

Continuity

Connector

Terminal

B3

3

Ground

No

ALEIA0035GB

SCS-24

< COMPONENT DIAGNOSIS >

EXHAUST VALVE SOLENOID CIRCUIT

EXHAUST VALVE SOLENOID CIRCUIT

Description

INFOID:0000000005148184

Receives exhaust valve solenoid signal from suspension control unit. When activated, the exhaust valve sole-

noid releases air pressure from the suspension control system.

Component Function Check

INFOID:0000000005148185

1.

CHECK EXHAUST SOLENOID OPERATION

CAUTION:

While operating this active test, the suspension control system will vent air pressure and the vehicle

ride height will lower. Ensure the area around the vehicle is free from obstructions before beginning

test. 

CONSULT-III

1. Ensure the suspension control system has air pressure and is not drooping in the rear.

2. Select "EXHAUST SOLENOID" of AIR LEVELIZER active test items.

3. While operating test item, check that the exhaust valve solenoid opens to vent air from the system. The

vehicle should lower when the exhaust valve solenoid is activated.

Does the system vent properly?

YES

>> Exhaust valve solenoid is operating normally.

NO

>> Refer to 

SCS-24, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005148186

Regarding Wiring Diagram information, refer to 

SCS-29, "Wiring Diagram"

.

1.

CHECK EXHAUST VALVE SOLENOID SIGNAL

CONSULT-III

1. Connect suspension control unit connector B3.

2. Turn ignition switch ON.

3. Select "EXHAUST SOLENOID" of AIR LEVELIZER active test

items.

4. While test item is operating, check signal between suspension

air compressor connector C9 terminal 2 and ground.

Is battery voltage present?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK CONTINUITY OF EXHAUST VALVE SOLENOID CIRCUIT

ON

: Air vents and vehicle ride height lowers

OFF

: No air vents and vehicle ride height remains constant

(+)

(-)

Voltage

Connector

Terminal

C9

2

Ground

Battery voltage

ALEIA0036GB

 

 

 

 

 

 

 

Content   ..  812  813  814  815   ..