Infiniti FX35, FX50 (S51). Manual — part 1606
CONTINUOUS DAMPING CONTROL SYSTEM
SCS-9
< SYSTEM DESCRIPTION >
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Component Description
INFOID:0000000005236141
Component
Reference/function
E-SUS control unit
Front body vertical G sensor
Front wheel vertical G sensor
Rear body vertical G sensor
Shock absorber actuator
Mode select switch (E-SUS mode select)
Sport mode indicator lamp
Steering angle sensor
Transmits the steering angle signal to E-SUS control unit via CAN communication.
ABS actuator and electric unit (control
unit)
Transmits mainly the following signals to E-SUS control unit via CAN communication.
• Vehicle speed signal
• Brake pressure control signal
• Brake lamp switch signal
ECM
Transmits mainly the following signals to E-SUS control unit via CAN communication.
• Requested torque signal
Unified meter and A/C amp.
Transmits mainly the following signals from E-SUS control unit via CAN communication.
• Sport mode indicator lamp signal
SCS-10
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (E-SUS CONTROL UNIT)
DIAGNOSIS SYSTEM (E-SUS CONTROL UNIT)
CONSULT-III Function
INFOID:0000000005236142
FUNCTION
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
*: If the memory in E-SUS control unit is erased, the DTC diagnosis result is also erased.
ECU IDENTIFICATION
E-SUS control unit part number can be read.
SELF-DIAGNOSTIC RESULT
Display Item List
.
DATA MONITOR
Display Item List
ACTIVE TEST
CAUTION:
• Always perform while the vehicle is stopped.
Diagnostic test mode
Function
ECU identification
E-SUS control unit part number can be read.
Self-diagnosis result
Self-diagnostic results can be read and erased quickly. *
Data monitor
Input/Output data in the E-SUS control unit can be read.
Active test
CONSULT-III drives some actuators via E-SUS, and changes some command signal values with-
in the specified range.
Monitor item (Unit)
Remarks
VEHICLE SPEED (km/h) or (MPH)
Vehicle speed recognized by E-SUS control unit
ST ANGLE SIG (deg)
Steering angle recognized by E-SUS control unit
IGN (V)
Ignition voltage supplied to E-SUS control unit
REQUESTED TRQ (Nm)
Required torque recognized by E-SUS control unit
FR BDY G-SEN VOL (V)
Output voltage from front RH body vertical G sensor
FL BDY G-SEN VOL (V)
Output voltage from front LH body vertical G sensor
R G-SEN VOL (V)
Output voltage from rear body vertical G sensor
FR WHL G-SEN VOL (V)
Output voltage from front RH wheel vertical G sensor
FL WHL G-SEN VOL (V)
Output voltage from front LH wheel vertical G sensor
FR ACTUATOR CRNT (A)
Control current for front RH wheel shock absorber actuator operation
FL ACTUATOR CRNT (A)
Control current for front LH wheel shock absorber actuator operation
RR ACTUATOR CRNT (A)
Control current for rear RH wheel shock absorber actuator operation
RL ACTUATOR CRNT (A)
Control current for rear LH wheel shock absorber actuator operation
G-SEN VOL (V)
Voltage supplied to G-sensor
BRK FLD PRESS (bar)
Fluid pressure recognized by E-SUS control unit when brake is applied
STP LAMP SW (On/Off)
Brake pedal operation status recognized by E-SUS control unit
MODE SW (On/Off)
E-SUS mode lamp condition
FAIL MODE SIG (On/Off)
E-SUS control unit is in fail-safe status.
CONTROL MODE (AUTO/SPORT)
Each control mode status
AUTO: AUTO mode
SPORT: SPORT mode
DIAGNOSIS SYSTEM (E-SUS CONTROL UNIT)
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< SYSTEM DESCRIPTION >
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• Always check shock absorber actuator if DTC is detected using the shock absorber actuator active
test.
• Shock absorber actuator
The control signal from CONSULT-III forces activation of the shock absorber actuator. The check can be per-
formed by confirming the operation noise.
• Mode lamp
The control signal from CONSULT-III forces activation of the mode lamp (ON/OFF) for check.
Test item
Display Item
Display
Operation half cycle
SHOCK ABSORB-
ER ACTUATOR
FRONT RIGHT ACTUATOR
0.1 seconds – 1 second (cycles in 0.1 seconds)
FRONT LEFT ACTUATOR
REAR RIGHT ACTUATOR
REAR LEFT ACTUATOR
FOUR WHEEL ACTUATOR
Test item
Display Item
Display
Illumination status
ON
OFF
MODE LAMP
SPORT
ON
OFF
SCS-12
< DTC/CIRCUIT DIAGNOSIS >
C1D01 VEHICLE SPEED SIGNAL
DTC/CIRCUIT DIAGNOSIS
C1D01 VEHICLE SPEED SIGNAL
Description
INFOID:0000000005588906
The vehicle speed signal is transmitted from the ABS actuator and electric unit (control unit) to E-SUS control
unit via CAN communication.
DTC Logic
INFOID:0000000005588907
DTC DETECTION LOGIC
DTC REPRODUCTION PROCEDURE
CAUTION:
If the CAN signal "Unavailable" or "Broken" is received while the battery voltage is in the low (between
6 V and 9 V) condition, and when intending to perform another self-diagnosis operation to record the
DTC history, always start the procedure after checking that the battery voltage is within the specified
normal value.
1.
CHECK E-SUS CONTROL UNIT SIGNAL
With CONSULT-III
1.
Start the engine.
CAUTION:
Always hold the vehicle stopped.
2.
Select “DATA MONITOR” of “E-SUS”.
3.
Check the value of “IGN” on “DATA MONITOR” screen.
Is the value in “DATA MONITOR” “between 6 V and 9 V” or more?
YES
>> GO TO 2.
NO
>> Perform the diagnosis for the charging system. Refer to
.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
Perform “E-SUS” self-diagnosis.
Is DTC “C1D01” detected?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005588908
1.
PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
With CONSULT-III
Perform “ABS” self-diagnosis.
Is DTC detected?
YES
>> Check the detected DTC items.
NO
>> GO TO 2.
2.
PERFORM SELF-DIAGNOSIS
With CONSULT-III
DTC
Display Item
Malfunction detected condition
Possible causes
C1D01
VEHICLE SPEED SIG
• A malfunction is detected in the vehicle speed
signal output from the ABS actuator and electric
unit (control unit) to CAN communication.
• No transmission of vehicle speed signal from the
ABS actuator and electric unit (control unit).
• Harness or connector
(CAN communication
line)
• ABS actuator and
electric unit (control
unit)
• E-SUS control unit
• Battery low voltage
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