Infiniti EX35. Manual - part 515

DLN-10

< FUNCTION DIAGNOSIS >

[TRANSFER: ETX13B]

AWD SYSTEM

Component Description

INFOID:0000000003561151

A.

Combination meter

B.

Glove box assembly removed

C.

Transfer assembly

Component parts

Reference/Function

AWD control unit

DLN-13, "Description"

Wheel sensors

BRC-35, "Description"

AWD solenoid

DLN-15, "Description"

Electric controlled coupling

Transmits driving force to rear final drive.

AWD warning lamp

DLN-23, "Description"

ABS actuator and electric unit (control unit)

DLN-14, "Description"

ECM

DLN-18, "Description"

Unified meter and A/C amp.

DLN-23, "Description"

DIAGNOSIS SYSTEM (AWD CONTROL UNIT)

DLN-11

< FUNCTION DIAGNOSIS >

[TRANSFER: ETX13B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

DIAGNOSIS SYSTEM (AWD CONTROL UNIT)

CONSULT-III Function (ALL MODE AWD/4WD)

INFOID:0000000003561153

FUNCTION

CONSULT-III can display each diagnostic item using the diagnostic test modes as follows.

ECU IDENTIFICATION

AWD control unit part number can be read.

SELF -DIAGNOSTIC RESULT

Before performing the self-diagnosis, start the engine and drive vehicle at 30 km/h (19 MPH) or more for
approximately 1 minute.

Display Item List

Refer to 

DLN-31, "DTC Index"

.

How to Erase Self-Diagnostic Results

Before erasing DTC memory, start the engine and drive at 30 km/h (19 MPH) or more for approximately 1
minute. Check that ABS warning lamp turns OFF.
NOTE:
When AWD warning lamp is ON with system malfunction of DTC “C1203”, run the vehicle at 30 km/h (19MPH)
or more for a minute and check that ABS warning lamp is turned OFF. Then turn ignition switch OFF, and start
the engine again. Otherwise AWD warning lamp may not turned OFF even if it is normal.

DATA MONITOR

Display Item List

ACTIVE TEST

Description

Diagnostic test mode

Function

Ecu Identification

AWD control unit part number can be read.

Self Diagnostic Result

Self-diagnostic results can be read and erased quickly.

Data Monitor

Input/Output data in the AWD control unit 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.

Monitor item (Unit)

Remarks

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 [##]

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 brake switch signal status via CAN communication line 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

FR RH SENSOR [km/h] or [mph]

Wheel speed calculated by front RH wheel sensor signal is displayed.

FR LH SENSOR [km/h] or [mph]

Wheel speed calculated by front LH wheel sensor signal is displayed.

RR RH SENSOR [km/h] or [mph]

Wheel speed calculated by rear RH wheel sensor signal is displayed.

RR LH SENSOR [km/h] or [mph]

Wheel speed calculated by rear LH wheel sensor signal is displayed.

DLN-12

< FUNCTION DIAGNOSIS >

[TRANSFER: ETX13B]

DIAGNOSIS SYSTEM (AWD CONTROL UNIT)

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 energize continuously for a long time.

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 approx. 

±

10% of command val-

ue.)
• Qu: Increase current value in increments of 0.2 A
• Qd: Decrease current value in increments of 0.2 A
• UP: Increase current value in increments of 0.02 A
• DOWN: Decrease current value in increments of 0.02 A

C1201 AWD CONTROL UNIT

DLN-13

< COMPONENT DIAGNOSIS >

[TRANSFER: ETX13B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

COMPONENT DIAGNOSIS

C1201 AWD CONTROL UNIT

Description

INFOID:0000000003561154

• Controls driving force distribution by signals from each sensor from rear wheel driving mode (0:100) to 4-

wheel driving mode (50:50).

• Rear wheel driving conditions is available by fail-safe function if malfunction is detected in AWD system.

DTC Logic

INFOID:0000000003561155

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform AWD control unit self-diagnosis.

Is DTC “C1201” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-13, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003561156

1.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

1.

Erase AWD control unit self-diagnostic results.

2.

Turn the ignition switch OFF, and then wait 10 seconds or more.

3.

Perform AWD control unit self-diagnosis.

Is DTC “C1201” detected?

YES

>> Replace AWD control unit. Refer to 

DLN-44, "Exploded View"

.

NO

>> Check AWD control unit pin terminals for damage or loose connection with harness connector. If

any items are damaged, repair or replace damaged parts.

DTC

Display item

Malfunction detected condition

Possible cause

C1201

CONTROLLER FAILURE

Malfunction has occurred inside AWD 
control unit.

Internal malfunction of AWD control unit