height INFINITI QX56 2009 Factory Service Manual

SCS-38
< SYMPTOM DIAGNOSIS >
SUSPENSION CONTROL SYSTEM DOES NOT LOWER
SUSPENSION CONTROL SYSTEM DOES NOT LOWER
DescriptionINFOID:0000000003772359
The suspension control system does not lower the vehicle in accordance with ride height changes.
Diagnosis ProcedureINFOID:0000000003772360
1.SUSPENSION CONTROL UNIT PO WER AND GROUND INSPECTION
Check the suspension control unit power and ground supply. Refer to SCS-17, "
SUSPENSION CONTROL
UNIT : Diagnosis Procedure".
Does the suspension control unit power and ground pass inspection?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning part.
2.CHECK HEIGHT SENSOR SIGNAL INPUT
CONSULT-III DATA MONITOR
1. Turn ignition ON.
2. Select "HEIGT SEN" of AI R LEVELIZER data monitor item.
3. Check the monitor status.
Is the height sensor voltage normal?
YES >> GO TO 3.
NO >> Check height sensor signal circuit. Refer to SCS-22, "
Diagnosis Procedure" .
3.EXHAUST VALVE SOLENOID CIRCUIT INSPECTION
Check the exhaust valve solenoid circuit. Refer to SCS-23, "
Component Function Check".
Does the exhaust valve solenoid circuit pass inspection?
YES >> Inspect for a restriction in the system . repair or replace the malfunctioning part.
NO >> Repair or replace the malfunctioning part. HEIGT SEN
: 0.2V - 4.8V
Revision: December 20092009 QX56

CONTROL VALVE WITH TCMTM-205
< ON-VEHICLE REPAIR >
CEF
G H
I
J
K L
M A
B
TM
N
O P
11. Remove bolts (A), (B) and (C) from control valve with TCM.  : Front
12. Remove control valve with TCM from transmission case. CAUTION:
When removing, be careful with the manual valve notch and
manual plate height. Remove it vertically.
13. Remove A/T fluid temperature sensor 2 with bracket from con- trol valve with TCM.
14. Remove bracket from A/T fluid temperature sensor 2.
15. Remove O-ring from A/T assembly harness connector.
Bolt symbol Length mm (in) Number of bolts A 42 (1.65) 5
B 55 (2.17) 6
C 40 (1.57) 1
SCIA8074E
SCIA5142E
SCIA5253E
SCIA5264E
SCIA5155E
Revision: December 20092009 QX56

DISASSEMBLYTM-239
< DISASSEMBLY AND ASSEMBLY >
CEF
G H
I
J
K L
M A
B
TM
N
O P
35. Remove bolts (A), (B) and (C) from control valve with TCM.  : Front
36. Remove control valve with TCM from transmission case. CAUTION:
When removing, be careful with the manual valve notch and
manual plate height. Remove it vertically.
37. Remove A/T fluid temperature sensor 2 with bracket from con- trol valve with TCM.
38. Remove bracket from A/T fluid temperature sensor 2.
39. Remove O-ring from A/T assembly harness connector.
Bolt symbol Length mm (in) Number of bolts A 42 (1.65) 5
B 55 (2.17) 6
C 40 (1.57) 1
SCIA8077E
SCIA5260E
SCIA5253E
SCIA5264E
SCIA5155E
Revision: December 20092009 QX56