Infiniti EX35. Manual — part 520
![](/vehicles/zatt/rylld/azoru/ugoinas.png)
DLN-30
< ECU DIAGNOSIS >
[TRANSFER: ETX13B]
AWD CONTROL UNIT
Fail-Safe
INFOID:0000000003561209
AWD system
• If any malfunction occurs in AWD electrical system, and control unit detects the malfunction, AWD warning
lamp on combination meter turns ON to indicate system malfunction.
• When AWD warning lamp is ON, vehicle changes to rear-wheel drive or shifts to 4-wheel drive (front-wheels
still have some driving torque).
JCDWM0207GB
![](/vehicles/zatt/rylld/azoru/juso.png)
AWD CONTROL UNIT
DLN-31
< ECU DIAGNOSIS >
[TRANSFER: ETX13B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
• AWD system activates its protection function (shuts down AWD system temporarily) if AWD system detects
high load continuously or the front wheel tire size differs from the rear tire size. (AWD system is automati-
cally restored if AWD system no longer detects any overload or the tire size difference is eliminated.)
*1: Quick blinking: 2 times/second (blinking for approximately 1 minute and then turned OFF)
*2: Slow blinking: 1 time/2 seconds (continuing to blink until ignition switch is turned OFF)
DTC Inspection Priority Chart
INFOID:0000000003135696
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC Index
INFOID:0000000003135697
Mode
Warning
lamp
DTC
Detected area (Error area)
Error area and root cause
Protection
function
Blinking
*1
—
AWD control unit
Transfer assembly in protection mode
(Internal temperature rise of electronic controlled coupling)
Blinking
*2
—
Outer diameters of front and
rear wheel tires
Malfunction in each tire or different tire diameter
Fail-safe
ON
C1201
AWD control unit
Internal malfunction of AWD control unit
C1203
ABS actuator and electric
unit (control unit)
ABS malfunction
• Vehicle speed signal error
C1204
AWD solenoid
Internal malfunction of electronic controlled coupling
C1205
AWD control unit
Internal malfunction of AWD control unit
C1210
ECM
Malfunction of engine control system
• Accelerator pedal position signal error
• Engine speed signal error
U1000
CAN communication line
• CAN communication error
• Malfunction of AWD control unit
U1010
AWD control unit
Malfunction of AWD control unit
Priority
Detected items (DTC)
1
• U1000 CAN COMM CIRCUIT
• U1010 CONTROL UNIT (CAN)
2
• C1201 CONTROLLER FAILURE
• C1205 4WD ACTUATOR RLY
3
• C1203 ABS SYSTEM
• C1210 ENGINE SIGNAL 1
4
• C1204 4WD SOLENOID
DTC
Display Items
Reference
C1201
CONTROLLER FAILURE
C1203
ABS SYSTEM
C1204
4WD SOLENOID
C1205
4WD ACTUATOR RLY
C1210
ENGINE SIGNAL 1
U1000
CAN COMM CIRCUIT
U1010
CONTROL UNIT (CAN)
DLN-32
< SYMPTOM DIAGNOSIS >
[TRANSFER: ETX13B]
AWD WARNING LAMP DOES NOT TURN ON
SYMPTOM DIAGNOSIS
AWD WARNING LAMP DOES NOT TURN ON
Description
INFOID:0000000003561238
AWD warning lamp does not turn ON when the ignition switch is turned to ON.
Diagnosis Procedure
INFOID:0000000003561239
1.
CHECK AWD WARNING LAMP
Perform the trouble diagnosis for AWD warning lamp. Refer to
Is the inspection result normal?
YES
>> Check each harness connector pin terminal for malfunction or disconnection.
NO
>> Repair or replace the malfunctioning part.
![](/vehicles/zatt/rylld/azoru/hmp.png)
AWD WARNING LAMP DOES NOT TURN OFF
DLN-33
< SYMPTOM DIAGNOSIS >
[TRANSFER: ETX13B]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
AWD WARNING LAMP DOES NOT TURN OFF
Description
INFOID:0000000003561240
AWD warning lamp does not turn OFF several seconds after the engine started.
Diagnosis Procedure
INFOID:0000000003561241
1.
PERFORM SELF-DIAGNOSIS
With CONSULT-III
Perform AWD control unit self-diagnosis.
Is any DTC detected?
YES
>> Check the DTC.
NO
>> GO TO 2.
2.
CHECK AWD WARNING LAMP
Perform the trouble diagnosis of the AWD warning lamp. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace the malfunctioning part.
3.
CHECK AWD CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Perform the trouble diagnosis of the power supply and ground circuit. Refer to
.
Is the inspection result normal?
YES
>> Check each harness connector pin terminal for malfunction or disconnection.
NO
>> Repair or replace the malfunctioning part.
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