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DIAGNOSIS SYSTEM (AIR LEVELIZER CONTROL MODULE)
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ACTIVE TEST
CAUTION:
Perform the procedure when the vehicle is stopped.
Be careful that battery is not discharged when pe rforming 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 st atus of CK SUSP indicator lamp.
Monitored item (Unit) Remarks
Item name Description
COMPRESSOR Air compress or 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.
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![INFINITI QX56 2011 Factory Service Manual
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AIR LEVELIZER CONTROL MODULE
ECU DIAGNOSIS INFORMATION
AIR LEVELIZER CONTROL MODULE
Reference ValueINFOID:0000000006256053
VALUES ON INFINITI QX56 2011 Factory Service Manual
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< ECU DIAGNOSIS INFORMATION >[AIR LEVELIZER CONTROL SYSTEM]
AIR LEVELIZER CONTROL MODULE
ECU DIAGNOSIS INFORMATION
AIR LEVELIZER CONTROL MODULE
Reference ValueINFOID:0000000006256053
VALUES ON](/manual-img/42/57033/w960_57033-4417.png)
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AIR LEVELIZER CONTROL MODULE
ECU DIAGNOSIS INFORMATION
AIR LEVELIZER CONTROL MODULE
Reference ValueINFOID: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
ConditionReference value
(Approx.)
+ − Signal name Input/
Output
2
(B) Ground GND — Always Less than 1
Ω
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
Ω
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Fail-safeINFOID:0000000006256054
If malfunction is detected, control INFINITI QX56 2011 Factory Service Manual
AIR LEVELIZER CONTROL MODULESCS-59
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Fail-safeINFOID:0000000006256054
If malfunction is detected, control](/manual-img/42/57033/w960_57033-4418.png)
AIR LEVELIZER CONTROL MODULESCS-59
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Fail-safeINFOID:0000000006256054
If malfunction is detected, control stops.
The system may enter fail-safe mode under certain condi tions (for example, over-laden conditions) when elec-
tronic circuit is normal.
In this case, always check that the system re turns to normal by starting engine after unloading load.
DTC Inspection Priority ChartINFOID:0000000006256055
If some DTCs are displayed at the same time, per form inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000006256056
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(W) Ground Vehicle height sensor
(SIGNAL) InputIGN ON 0.2 – 4.6 V
IGN OFF 0 V
7
(P) 16
(L) CAN-L
Input/
Output — 54 – 69
Ω
9
(P/L) Ground Air levelizer co
ntrol module
power supply InputIGN 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)
OutputIGN ON 4.5 – 5.5 V
IGN OFF 0 V
16
(L) 7
(P) CAN-H Input/
Output — 54 – 69
Ω
Te r m i n a l
(Wire color) Description
ConditionReference 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 RELAYSCS-72
C1803 AIR SUS EXH SOLSCS-74
C1804 VHCL HEIGHT ADJ UPSCS-77
C1805 VHCL HEIGHT ADJ DOWNSCS-80
C1806 VHCL HEIGHT SEN FIXSCS-81
C1807 VHCL HEIGHT SEN VOLTSCS-82
C1808 AIR SUS COMPRS FNCTNSCS-84
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AIR LEVELIZER CONTROL MODULE
U1000 CAN COMM CIRCUIT
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U1010 CONTROL UNIT (CAN)SCS-88
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WIRING DIAGRAM
AIR LEVELIZER CONTROL SYSTEM
Wiring DiagramINFOID:0000000006256057
JCEWM0220GB
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AIR LEVELIZER CONTROL SYSTEM
JCEWM0221GB
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JCEWM0222GB
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AIR LEVELIZER CONTROL SYSTEM
JCEWM0223GB
Revision: 2010 May2011 QX56