Infiniti QX56 (JA60). Manual — part 817
SUSPENSION CONTROL UNIT
SCS-33
< ECU DIAGNOSIS >
C
D
F
G
H
I
J
K
L
M
A
B
SCS
N
O
P
ABEIA0017GB
SCS-34
< ECU DIAGNOSIS >
SUSPENSION CONTROL UNIT
DTC Index
INFOID:0000000005148192
Self-diagnosis results display item
ABEIA0018GB
CONSULT-III display
Malfunction
Reference page
Vehicle height sensor [C1801]
Vehicle height sensor voltage is less than 0.2V or greater than
4.8V for more than 60 seconds.
.
SUSPENSION CONTROL UNIT
SCS-35
< ECU DIAGNOSIS >
C
D
F
G
H
I
J
K
L
M
A
B
SCS
N
O
P
Compressor relay [C1802]
• Driving transistor for compressor relay is OFF and monitor
voltage continues at a high level for more than 10 seconds.
• Driving transistor for compressor relay is ON and monitor
voltage continues at a low level for more than 5 seconds.
Exhaust solenoid [C1803]
• Driving transistor for exhaust valve solenoid is OFF and
monitor voltage continues at a high level for more than 10
seconds.
• Driving transistor for exhaust valve solenoid is ON and mon-
itor voltage continues at a low level for more than 5 seconds.
Vehicle height adjusting malfunc-
tion (compressor)[C1804]
Continuous compressor relay ON time is more than 120 sec-
onds.
Vehicle height adjusting malfunc-
tion (exhaust solenoid)[C1805]
Continuous exhaust valve solenoid ON time is more than 120
seconds.
Vehicle height sensor locking mal-
function [C1806]
Output sensor voltage variation
±0.02V is more than 100 sec-
onds when vehicle height range is normal.
SCS-14, "Diagnosis Proce-
dure"
.
Sensor 5V malfunction [C1807]
Sensor reference voltage is less than 0.8V or more than 6V for
20 seconds.
Integral time malfunction by sup-
plying air [C1808]
A suspension air compressor ON request has been in effect
for 180 seconds and the suspension air compressor has not
activated during that time.
SCS-36
< SYMPTOM DIAGNOSIS >
SUSPENSION CONTROL SYSTEM
SYMPTOM DIAGNOSIS
SUSPENSION CONTROL SYSTEM
Symptom Table
INFOID:0000000005148193
AIR LEVELIZER
Symptom
Possible cause
Reference page
Inoperative
• Suspension control unit
• Compressor motor relay
• Suspension air compressor
SCS-37, "Diagnosis Proce-
dure"
System does not raise
• Suspension control unit
• Height sensor
• Compressor motor relay
• Suspension air compressor
• Leak in system
• Restriction in system
SCS-38, "Diagnosis Proce-
dure"
System does not lower
• Suspension control unit
• Height sensor
• Compressor motor relay
• Suspension air compressor
• Restriction in system
SCS-39, "Diagnosis Proce-
dure"
CK SUSP indicator lamp always ON with key ON
• CK SUSP indicator lamp control circuit
• Suspension control unit
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