Infiniti QX56 (Z62). Manual - part 1105

 

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Infiniti QX56 (Z62). Manual - part 1105

 

 

DIAGNOSIS SYSTEM (AIR LEVELIZER CONTROL MODULE)

SCS-57

< SYSTEM DESCRIPTION >

[AIR LEVELIZER CONTROL SYSTEM]

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

ACTIVE TEST

CAUTION:

• Perform the procedure when the vehicle is stopped.
• Be careful that battery is not discharged when performing the procedure while engine is stopped.

VHCL HGT INIT VAL

(V) 

• Displays voltage when standard vehicle height is set.
• Value does not change until setting of standard vehicle height is performed again.

COMPRESSOR

Displays operation status of air compressor.

EXH SOLENOID

Displays operation status of exhaust solenoid.

ENG SPEED SIG

Displays operation status of engine.

WARNING LAMP

Displays turning ON status of CK SUSP indicator lamp.

Monitored item (Unit)

Remarks

Item name

Description

COMPRESSOR

Air compressor can be operated.

EXHAUST SOLENOID

Ehaust solenoid of air compressore can be operated.

WARNING LAMP

CK SUSP indicator lamp can be turned ON or OFF.

SCS-58

< ECU DIAGNOSIS INFORMATION >

[AIR LEVELIZER CONTROL SYSTEM]

AIR LEVELIZER CONTROL MODULE

ECU DIAGNOSIS INFORMATION

AIR LEVELIZER CONTROL MODULE

Reference Value

INFOID:0000000006256053

VALUES ON DIAGNOSIS TOOL

TERMINAL LAYOUT

PHYSICAL VALUES

Item name

Condition

Value/Status (Approx.)

IGN VOLT

Ignition switch ON

10 – 16 V

VHCL HT INTLZ STA

Completion of the standard vehicle height setting

CMPLT

Other than the above

INCMP

VHCL HT INIT SLCT

Completion of the standard vehicle height setting

1

Other than the above

0

VHCL HEIGHT SEN

Lift up the vehicle

2.8 – 3.8 V

VHCL HT CNVSN VL

Lift down the vehicle

15 – 15 mm

VHCL HGT FIX TIME

Lift up the vehicle

0 h

VHCL HGT INIT VAL

Completion of the standard vehicle height setting

2.800 – 3.800 V

Other than the above

0 V

COMPRESSOR

When the air compressor is operating

On

Other than the above

Off

EXH SOLENOID

When exhaust solenoid is operating

On

Other than the above

Off

ENG SPEED SIG

Engine running

RUN

Other than the above

STOP

WARNING LAMP

When CK SUSP indicator lamp is ON

On

Other than the above

Off

JSDIA0057ZZ

Terminal

(Wire color)

Description

Condition

Reference value

(Approx.)

+

Signal name

Input/

Output

2

(B)

Ground

GND

Always

Less than 1 

3

(V)

Ground

Air compressor relay

Output

IGN ON

Air compressor: ON

9 – 16 V

Air compressor: OFF

Less than 2 V

4

(L/W)

Ground

Vehicle height sensor 
(GND)

Always

Less than 1 

AIR LEVELIZER CONTROL MODULE

SCS-59

< ECU DIAGNOSIS INFORMATION >

[AIR LEVELIZER CONTROL SYSTEM]

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

Fail-safe

INFOID:0000000006256054

If malfunction is detected, control stops.
The system may enter fail-safe mode under certain conditions (for example, over-laden conditions) when elec-
tronic circuit is normal.
In this case, always check that the system returns to normal by starting engine after unloading load.

DTC Inspection Priority Chart

INFOID:0000000006256055

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.

DTC Index

INFOID:0000000006256056

5

(W)

Ground

Vehicle height sensor 
(SIGNAL)

Input

IGN ON

0.2 – 4.6 V

IGN OFF

0 V

7

(P)

16

(L)

CAN-L

Input/

Output

54 – 69 

9

(P/L)

Ground

Air levelizer control module 
power supply

Input

IGN ON

10 – 16 V

IGN OFF

0 V

11

(V/W)

Ground

Exhaust solenoid

Output

IGN ON

Exhaust solenoid: ON

9 – 16 V

Exhaust solenoid: OFF

Less than 2 V

13

(R)

Ground

Vehicle height sensor 
(Power supply)

Output

IGN ON

4.5 – 5.5 V

IGN OFF

0 V

16

(L)

7

(P)

CAN-H

Input/

Output

54 – 69 

Terminal

(Wire color)

Description

Condition

Reference value

(Approx.)

+

Signal name

Input/

Output

Priority

Detected items (DTC)

1

• U1000 CAN COMM CIRCUIT
• U1010 CONTROL UNIT (CAN)

2

• C1801 VHCL HEIGHT SENSOR
• C1802 AIR SUS COMPRS RELAY
• C1803 AIR SUS EXH SOL
• C1806 VHCL HEIGHT SEN FIX
• C1807 VHCL HEIGHT SEN VOLT

3

• C1804 VHCL HEIGHT ADJ UP
• C1805 VHCL HEIGHT ADJ DOWN
• C1808 AIR SUS COMPRS FNCTN

DTC

CONSULT-III display

Reference page

C1801

VHCL HEIGHT SENSOR

SCS-69

C1802

AIR SUS COMPRS RELAY

SCS-72

C1803

AIR SUS EXH SOL

SCS-74

C1804

VHCL HEIGHT ADJ UP

SCS-77

C1805

VHCL HEIGHT ADJ DOWN

SCS-80

C1806

VHCL HEIGHT SEN FIX

SCS-81

C1807

VHCL HEIGHT SEN VOLT

SCS-82

C1808

AIR SUS COMPRS FNCTN

SCS-84

SCS-60

< ECU DIAGNOSIS INFORMATION >

[AIR LEVELIZER CONTROL SYSTEM]

AIR LEVELIZER CONTROL MODULE

U1000

CAN COMM CIRCUIT

SCS-87

U1010

CONTROL UNIT (CAN)

SCS-88

 

 

 

 

 

 

 

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