Infiniti G35 (V35) Sedan. Manual — part 394
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< FUNCTION DIAGNOSIS >
[TRANSFER: ETX13B]
AWD SYSTEM
• When driving, AWD warning lamp may blink slowly if there is a significant difference in diameter of the tires.
At this time, vehicle performance is not fully available and cautious driving is required. (Continues until
engine is turned OFF.)
• If the warning lamp blinks slowly during driving but remains OFF after engine is restarted, the system is nor-
mal. If it again blinks slowly after driving for some time, vehicle must be inspected.
• When the difference of revolution speed between the front and rear wheel the shift occasionally changes to
direct 4-wheel driving conditions automatically. This is not malfunction.
OPERATION PRINCIPLE
ELECTRIC CONTROLLED COUPLING
1.
AWD control unit supplies command current to electric controlled coupling (AWD solenoid).
2.
Control clutch is engaged by electromagnet and torque is detected in control clutch.
3.
The cam operates in response to control clutch torque and applies pressure to main clutch.
4.
Main clutch transmits torque to front wheels according to pressing power.
• Transmission torque to front wheels is determined according
to command current.
Component Parts Location
INFOID:0000000000957228
SDIA2270E
SDIA1844E
1.
AWD warning lamp
2.
AWD control unit
3.
AWD solenoid harness connector
JSDIA0049ZZ
AWD SYSTEM
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< FUNCTION DIAGNOSIS >
[TRANSFER: ETX13B]
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Component Description
INFOID:0000000000957229
A.
Combination meter
B.
Glove box assembly removed
C.
Transfer assembly
Component parts
Reference/Function
AWD control unit
Wheel sensors
Detects wheel speed.
AWD solenoid
Electric controlled coupling
Transmits driving force to front final drive.
AWD warning lamp
ABS actuator and electric unit (control unit)
ECM
Unified meter and A/C amp.
Transmits conditions of parking brake switch via CAN communica-
tion to AWD control unit.
DLN-12
< FUNCTION DIAGNOSIS >
[TRANSFER: ETX13B]
DIAGNOSIS SYSTEM (AWD CONTROL UNIT)
DIAGNOSIS SYSTEM (AWD CONTROL UNIT)
CONSULT-III Function (ALL MODE AWD/4WD)
INFOID:0000000000957230
FUNCTION
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
SELF-DIAG RESULT MODE
• Drive at 30 km/h or more for approximately 1 minute before performing the self-diagnosis.
Display Item List
CAUTION:
• If “CAN COMM CIRCUIT [U1000]” or “CONTROL UNIT (CAN) [U1010]” is displayed with other DTCs, first perform the trouble
diagnosis for CAN communication line.
• Make sure that ABS warning lamp turns OFF by driving for a minute at vehicle speed of 30 km/h (19 MPH) or more after turn-
ing ignition switch OFF if AWD warning lamp turns ON with system malfunction of “ABS SYSTEM [C1203]”. AWD warning
lamp may not turn OFF if it is normal unless ignition switch turns OFF at once and engine restarts after that.
How to Erase Self-Diagnostic Results
• Before erasing DTC memory, start the engine and drive at 30 km/h or more for approximately 1 minute.
Check that ABS warning lamp turns OFF.
NOTE:
Make sure that ABS warning lamp turns OFF by driving for a minute at vehicle speed of 30 km/h (19 MPH)
or more after turning ignition switch OFF if AWD warning lamp turns ON with system malfunction of “ABS
Diagnostic test mode
Function
Self-diagnostic results
• Self-diagnostic results can be read and erased quickly.
Data monitor
• Input/Output data in the AWD control unit can be read.
CAN diagnostic support monitor
• The results of transmit/receive diagnosis of CAN communication can be read.
Active test
• Diagnostic Test Mode in which CONSULT-III drives some actuators apart from the AWD control
unit and also shifts some parameters in a specified range.
ECU part number
• AWD control unit part number can be read.
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
CONTROLLER FAILURE
[C1201]
Malfunction has occurred inside AWD control unit.
Internal malfunction of AWD
control unit
ABS SYSTEM
[C1203]
Malfunction related to wheel sensor has been detected by ABS actua-
tor and electric unit (control unit).
ABS malfunction
• Vehicle speed signal error
• Stop lamp switch signal
(brake signal) error
4WD SOLENOID
[C1204]
Malfunction related to AWD solenoid has been detected.
Internal malfunction of elec-
tronic controlled coupling
4WD ACTUATOR RLY
[C1205]
Malfunction has been detected from AWD actuator relay integrated with
AWD control unit, or malfunction related to AWD solenoid has been de-
tected.
Internal malfunction of AWD
control unit
ENGINE SIGNAL 1
[C1210]
Malfunction has been detected from ECM.
Malfunction of engine control
system
• Accelerator pedal position
signal error
• Engine speed signal error
CAN COMM CIRCUIT
[U1000]
When AWD control unit is not transmitting or receiving CAN communi-
cation signal for 2 seconds or more.
CAN communication line error
CONTROL UNIT (CAN)
[U1010]
When detecting error during the initial diagnosis of CAN controller of
AWD control unit.
AWD control unit error
NO DTC IS DETECTED.
FURTHER TESTING MAY
BE REQUIRED.
No NG item has been detected.
—
DIAGNOSIS SYSTEM (AWD CONTROL UNIT)
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< FUNCTION DIAGNOSIS >
[TRANSFER: ETX13B]
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SYSTEM [C1203]”. AWD warning lamp may not turn OFF if it is normal unless ignition switch turns OFF at
once and engine restarts after that.
DATA MONITOR MODE
Display Item List
×
: Standard
❏
: Optional item
ACTIVE TEST MODE
Description
• Use this mode to determine and identify the details of a malfunction based on self-diagnostic results or data
monitor. AWD control unit gives drive signal to actuator with receiving command from CONSULT-III to check
operation of actuator.
Test Item
CAUTION:
Never continuously energize for a long time.
Monitor item (Unit)
Monitor Menu
Remarks
ECU INPUT
SIGNALS
MAIN
SIGNALS
FR RH SENSOR [km/h] or [mph]
×
×
Wheel speed calculated by front wheel sensor RH sig-
nal is displayed.
FR LH SENSOR [km/h] or [mph]
×
×
Wheel speed calculated by front wheel sensor LH sig-
nal is displayed.
RR RH SENSOR [km/h] or [mph]
×
×
Wheel speed calculated by rear wheel sensor RH sig-
nal is displayed.
RR LH SENSOR [km/h] or [mph]
×
×
Wheel speed calculated by rear wheel sensor LH sig-
nal is displayed.
BATTERY VOLT [V]
❏
❏
Power supply voltage for AWD control unit
THRTL POS SEN [%]
❏
❏
Throttle opening status is displayed.
ETS SOLENOID [A]
❏
❏
Monitored value of current at AWD solenoid
STOP LAMP SW [On/Off]
❏
❏
Stop lamp switch signal status via CAN communication
line is displayed.
ENG SPEED SIG [Run/Stop]
❏
❏
Engine status is displayed.
ETS ACTUATOR [On/Off]
❏
❏
Operating condition of AWD actuator relay (integrated
in AWD control unit) is displayed.
4WD WARN LAMP [On/Off]
❏
❏
Control status of AWD warning lamp is displayed.
4WD MODE SW [AUTO]
❏
❏
Mode switch is not equipped, but displayed.
4WD MODE MON [AUTO]
❏
❏
Control status of AWD is displayed.
DIS-TIRE MONI [mm]
❏
❏
Improper size tire installed condition is displayed.
P BRAKE SW [On/Off]
❏
❏
Parking switch signal status via CAN communication
line is displayed.
Test item
Condition
Description
ETS S/V
(Detects AWD solenoid)
• Vehicle stopped
• Engine running
• No DTC detected
• Change command current value to AWD solenoid, and then change driving
mode. (Monitor value is normal if it is within approximately
±
10% of com-
mand value.)
Qu: Increase current value in increments of 0.20 A
Qd: Decrease current value in increments of 0.20 A
UP: Increase current value in increments of 0.02 A
DOWN: Decrease current value in increments of 0.02 A
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