Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2003_Q45 scs

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SUSPENSION CONTROL SYSTEM

E SUSPENSION

B
SECTION
SUSPENSION CONTROL SYSTEM C

SCS
CONTENTS
TROUBLE DIAGNOSIS FOR ACTIVE DAMPER ACTIVE TEST PROCEDURE ............................ 17 . F
SUSPENSION ............................................................ 2
. Self-Diagnosis ....................................................... 19
.
Precautions ............................................................. 2
. FUNCTION ......................................................... 19 .
PRELIMINARY CHECK ....................................... 2 . SELF-DIAGNOSTICS PROCEDURE ................. 19 . G
Fail-Safe .................................................................. 2
. HOW TO READ SELF-DIAGNOSTIC RESULTS 19 ...
FAIL-SAFE FUNCTIONS ..................................... 2 . MALFUNCTION CODE/SYMPTOM CHART ...... 20 .
FAIL-SAFE ITEMS ............................................... 2 . HOW TO ERASE SELF-DIAGNOSTIC
H
Active Damper Suspension Configuration .............. 3 . RESULTS ........................................................... 20.
SYSTEM COMPONENTS .................................... 3 . TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
SCHEMATIC ........................................................ 4 . ITEMS ....................................................................... 21
.
CONTROL UNIT INPUT/OUTPUT SIGNAL Inspection 1: Vehicle Speed Sensor ...................... 21 . I
STANDARD ........................................................ 14 . Inspection 2: Steering Angle Sensor ..................... 21 .
CONSULT-II Inspection Procedure ....................... 15 . Inspection 3: Stop Lamp Switch ............................ 22 .
SELF-DIAGNOSIS PROCEDURE ..................... 15 . Inspection 4: Vertical G sensor .............................. 23 . J
DATA MONITOR PROCEDURE ........................ 16 . TROUBLE DIAGNOSIS FOR SYMPTOMS ............. 25 .
DATA MONITOR MODE .................................... 16 . Inspection 5: Hard or Soft Feel .............................. 25 .
K

Revision; 2004 April SCS-1 2003 Q45
TROUBLE DIAGNOSIS FOR ACTIVE DAMPER SUSPENSION

TROUBLE DIAGNOSIS FOR ACTIVE DAMPER SUSPENSION PFP:25962

Precautions EES000EX

PRELIMINARY CHECK
q Check power steering fluid level.
q Check power steering fluid line for improper attachment, leaks, cracks, damage, loose connections, chaf-
ing and deterioration.
q Check tire pressure.
q Check wheel alignment.
q Check shock absorber for oil leakage or other damage.
Fail-Safe EES000EY

FAIL-SAFE FUNCTIONS
The active damper suspension electronically controls the shock absorber dampening force. If, for some rea-
son, the dampening force falls under any of the conditions listed in the "Fail-safe items" table below, the fail-
safe system will activate to maintain a constant level of shock absorber dampening force. If symptoms (such
as unstable steering, unpleasant riding comfort, etc.) are pointed out, check and correct the malfunctioning
part or area using the diagnostic procedure outlined under "Diagnostic Procedure 6 (Hard or soft feel)". Refer
to SCS-25, "TROUBLE DIAGNOSIS FOR SYMPTOMS"
FAIL-SAFE ITEMS
Item Fail-safe input conditions Fail-safe end conditions Fail-safe processing
q Vehicle speed signal cannot be entered for
q Shock absorber dampen-
more than 10 seconds when the vehicle is run-
A signal corresponding ing force is maintained at
ning with the engine revolution greater than
to a vehicle speed of a preset value.
Vehicle speed sensor 1,500 rpm.
greater than 2 km/h (1 q Power steering control
q Vehicle speed signal changes from a value of MPH) is entered. current is maintained at
greater than 30 km/h (19 MPH) to a value of
approximately 0.18A.
less than 2 km/h (1 MPH) within 1.4 seconds.
A steering signal of greater than 1

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