Infiniti G35 (V35) Sedan. Manual — part 397
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< COMPONENT DIAGNOSIS >
[TRANSFER: ETX13B]
U1010 CONTROL UNIT (CAN)
U1010 CONTROL UNIT (CAN)
Description
INFOID:0000000000957250
• CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle
multiplex communication line with high data communication speed and excellent error detection ability. Many
electronic control units are equipped onto a vehicle, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with
less wiring. Each control unit transmits/receives data but selectively reads required data only.
DTC Logic
INFOID:0000000000957251
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform the self-diagnosis.
Is DTC “U1010” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000000957252
1.
AWD CONTROL UNIT INSPECTION
Check AWD control unit harness connector for disconnection and deformation.
Is the inspection result normal?
YES
>> Replace AWD control unit. Refer to
NO
>> Repair or replace damaged parts.
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
U1010
CONTROL UNIT (CAN)
When detecting error during the initial di-
agnosis of CAN controller of AWD con-
trol unit.
AWD control unit error
POWER SUPPLY AND GROUND CIRCUIT
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< COMPONENT DIAGNOSIS >
[TRANSFER: ETX13B]
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POWER SUPPLY AND GROUND CIRCUIT
Description
INFOID:0000000000957253
• Supplies power to AWD control unit.
Diagnosis Procedure
INFOID:0000000000957254
1.
AWD CONTROL UNIT POWER SUPPLY INSPECTION
1.
Turn the ignition switch OFF.
2.
Disconnect AWD control unit harness connector.
3.
Check the voltage between AWD control unit harness connector and ground.
4.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
5.
Check the voltage between AWD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>>
Check the following. If any items are damaged, repair or replace damaged parts.
• 10A fuse (#45) open
- Short among 10A fuse (#45) connector, AWD control unit harness connector No. 7 terminal and
the ground
- Open between the ignition switch and AWD control unit harness connector No. 7 terminal
2.
AWD SOLENOID VALVE POWER SUPPLY INSPECTION
Check the voltage between AWD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>>
Check the following. If any items are damaged, repair or replace damaged parts.
• 10A fuse (#33) open
- Short among 10A fuse (#33) connector, AWD control unit harness connector No. 9 terminal and
the ground
- Open between the battery and AWD control unit harness connector No. 9 terminal
3.
AWD SOLENOID VALVE GROUND INSPECTION
1.
Turn the ignition switch OFF.
2.
Check the continuity between AWD control unit harness connector and ground.
AWD control unit
Voltage (Approx.)
Connector
Terminal
F108
7 – Ground
0 V
AWD control unit
Voltage (Approx.)
Connector
Terminal
F108
7 – Ground
Battery voltage
AWD control unit
Voltage (Approx.)
Connector
Terminal
F108
9 – Ground
Battery voltage
AWD control unit
Continuity
Connector
Terminal
F108
10 – Ground
Existed
11 – Ground
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< COMPONENT DIAGNOSIS >
[TRANSFER: ETX13B]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace damaged parts.
AWD WARNING LAMP
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< COMPONENT DIAGNOSIS >
[TRANSFER: ETX13B]
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AWD WARNING LAMP
Description
INFOID:0000000000957255
• Turns ON when there is a malfunction in AWD system. It indicates that fail-safe mode is engaged and vehi-
cle change to rear-wheel drive or shifting driving force-AWD (Front-wheels still have some driving torque).
• Also turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF approximately for 1
second after the engine starts if system is normal.
AWD WARNING LAMP INDICATION
CAUTION:
AWD warning lamp also turns ON due to data reception error, CAN communication error etc.
Diagnosis Procedure
INFOID:0000000000957256
1.
UNIFIED METER AND A/C AMP. SELF-DIAGNOSIS
With CONSULT-III
Perform the self-diagnosis of the unified meter and A/C amp.
Is any error system detected?
YES
>> Check the error system.
NO
>> GO TO 2.
2.
SELF-DIAGNOSIS STARTS
With CONSULT-III
Perform AWD control unit self-diagnosis.
Is DTC “U1000” detected?
YES
>> Check the error system.
NO
>> GO TO 3.
3.
COMBINATION METER CIRCUIT INSPECTION
With CONSULT-III
Perform the system diagnosis for “B2202”. Refer to
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace the specific malfunctioning part.
4.
AWD WARNING LAMP INSPECTION
With CONSULT-III
1.
Connect the unified meter and A/C amp. harness connector.
2.
Connect the combination meter harness connector.
3.
Disconnect AWD solenoid harness connector.
4.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
5.
Check “4WD W/L” of AWD control unit CONSULT-III “DATA MONITOR”.
Does the item on “DATA MONITOR” indicate “On”?
Condition
AWD warning lamp
Lamp check
Turns ON when ignition switch is turned ON. Turns OFF ap-
prox. 1 second after engine start.
AWD system malfunction
ON
Protection function is activated due to heavy load to electric controlled
coupling. (AWD system is not malfunctioning and AWD system chang-
es to 2WD mode.)
Quick blinking: 2 times/second
(Blinking in approx. 1 minute and then turning OFF)
Large difference in diameter of front/rear tires
Slow blinking: 1 time/2 seconds
(Continuing to blink until turning ignition switch OFF)
Other than above (system normal)
OFF
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