Infiniti QX56 (JA60). Manual - part 811

 

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

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  809  810  811  812   ..

 

 

Infiniti QX56 (JA60). Manual - part 811

 

 

C1801 VEHICLE HEIGHT SENSOR

SCS-9

< COMPONENT DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

COMPONENT DIAGNOSIS

C1801 VEHICLE HEIGHT SENSOR

Description

INFOID:0000000005148151

The vehicle height sensor operates on a 5 volt reference signal from the suspension control unit. The suspen-

sion control unit also provides ground to the height sensor. Depending on vehicle height, the height sensor

signal should have between 0.2V and 4.8V. 

DTC Logic

INFOID:0000000005148152

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005148153

1.

CHECK HEIGHT SENSOR OPERATION

CONSULT-III

1. Turn ignition switch ON

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

Is the HEIGHT SEN voltage within the given range?

YES

>> Height sensor is operating normally.

NO

>> Refer to 

SCS-23, "Diagnosis Procedure"

DTC

CONSULT-III

Diagnostic item is detected when ...

Probable malfunction location

C1801

VEHICLE HEIGHT SEN-
SOR

Vehicle height sensor voltage is less than 0.2V 
or greater than 4.8V for more than 60 seconds. 

• Height sensor power/ground supply. Refer to 

SCS-18, "HEIGHT SENSOR : Diagnosis 
Procedure"

.

• Height sensor signal circuit. Refer to 

SCS-

23, "Component Function Check"

.

HEIGHT SEN

: 0.2V - 4.8V

SCS-10

< COMPONENT DIAGNOSIS >

C1802 COMPRESSOR RELAY

C1802 COMPRESSOR RELAY

Description

INFOID:0000000005148154

The compressor motor relay is controlled by the suspension control unit. The suspension control unit supplies

voltage to the coil side of the relay to activate it. The compressor motor relay, when activated, supplies power

to the suspension air compressor. 

DTC Logic

INFOID:0000000005148155

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005148156

1.

CHECK COMPRESSOR MOTOR RELAY OPERATION

CAUTION:

The "COMPRESSOR" active test will remain ON until it is turned off using CONSULT-III. Allowing the

compressor to run for an extended period of time may cause damage to the air levelizer system com-

ponents due to excessive air pressure.

CONSULT-III

1. Turn ignition ON.

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

3. While operating test item, check that the suspension air compressor turns ON.

Does the suspension air compressor operate properly?

YES

>> Compressor motor relay and suspension air compressor are operating normally.

NO

>> Refer to 

SCS-20, "Diagnosis Procedure"

.

DTC

CONSULT-III

Diagnostic item is detected when ...

Probable malfunction location

C1802

COMPRESSOR RELAY

• Driving transistor for the compressor relay is 

OFF and monitor voltage continues at a high 
level for more than 10 seconds.

• Driving transistor for the compressor relay is 

ON and monitor voltage continues at a low 
level for more than 5 seconds. 

Compressor motor relay. Refer to 

SCS-20, 

"Component Function Check"

.

ON

: Compressor turns ON

OFF

: Compressor turns OFF

C1803 EXHAUST SOLENOID

SCS-11

< COMPONENT DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

C1803 EXHAUST SOLENOID

Description

INFOID:0000000005148157

The exhaust valve solenoid controls the vent function of the suspension control system. The exhaust valve

solenoid is built into the suspension air compressor. The suspension control unit supplies voltage to the

exhaust valve solenoid to activate it. 

DTC Logic

INFOID:0000000005148158

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005148159

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, "Description"

.

DTC

CONSULT-III

Diagnostic item is detected when ...

Probable malfunction location

C1803 EXHAUST 

SOLENOID

• Driving transistor for the exhaust valve sole-

noid is OFF and monitor voltage continues at 
a high level for more than 10 seconds. 

• Driving transistor for the exhaust valve sole-

noid is ON and monitor voltage continues at 
a low level for more than 5 seconds. 

Open or short circuit in the exhaust valve sole-
noid control circuit.  Refer to 

SCS-24, "Compo-

nent Function Check"

.

ON

: Air vents and vehicle ride height lowers

OFF

: No air vents and vehicle ride height remains constant

SCS-12

< COMPONENT DIAGNOSIS >

C1804 HEIGHT ADJUSTING MALFUNCTION (COMPRESSOR)

C1804 HEIGHT ADJUSTING MALFUNCTION (COMPRESSOR)

Description

INFOID:0000000005148160

The compressor motor relay is controlled by the suspension control unit. The suspension control unit supplies

voltage to the coil side of the relay to activate it. The compressor motor relay, when activated, supplies power

to the suspension air compressor. 

DTC Logic

INFOID:0000000005148161

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005148162

1.

CHECK COMPRESSOR MOTOR RELAY OPERATION

CAUTION:

The "COMPRESSOR" active test will remain ON until it is turned off using CONSULT-III. Allowing the

compressor to run for an extended period of time may cause damage to the air levelizer system com-

ponents due to excessive air pressure.

CONSULT-III

1. Turn ignition ON.

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

3. While operating test item, check that the suspension air compressor turns ON.

Does the suspension air compressor operate properly?

YES

>> Compressor motor relay and suspension air compressor are operating normally.

NO

>> Refer to 

SCS-20, "Diagnosis Procedure"

.

DTC

CONSULT-III

Diagnostic item is detected when ...

Probable malfunction location

C1804

VEHICLE HEIGHT AD-
JUSTING MALFUNC-
TION (COMPRESSOR)

Continuous compressor relay ON time is more 
than 120 seconds. 

Compressor motor relay. Refer to 

SCS-20, 

"Component Function Check"

.

ON

: Compressor turns ON

OFF

: Compressor turns OFF

 

 

 

 

 

 

 

Content   ..  809  810  811  812   ..