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Infiniti M35/M45 Y50. Manual - part 1128

TROUBLE DIAGNOSIS

TF-19

TDWT0023E

TF-20

TROUBLE DIAGNOSIS

Trouble Diagnosis Chart for Symptoms

NDS000DK

If AWD warning lamp turns ON, perform self-diagnosis. Refer to

TF-22, "SELF-DIAG RESULT MODE"

NOTE:
Light tight-corner braking symptom may occur depending on driving conditions. This is not malfunction.

AWD Control Unit Input/Output Signal Reference Values

NDS000DL

AWD CONTROL UNIT INSPECTION TABLE
Specifications with CONSULT-II

Symptom

Condition

Check item

Reference page

AWD warning lamp does not turn ON when
the ignition switch is turned to ON.
(AWD warning lamp check)

Ignition switch: ON

CAN communication line

TF-33

Unified meter and A/C amp.

Unified meter control unit

AWD warning lamp does not turn OFF sev-
eral seconds after engine started.

Engine running

CAN communication line

TF-33

Power supply and ground for AWD con-
trol unit

Unified meter and A/C amp.

Unified meter control unit

AWD solenoid

AWD actuator relay (integrated in AWD
control unit)

Wheel sensor

Heavy tight-corner braking symptom occurs
when the vehicle is driven and the steering
wheel is turned fully to either side after the
engine is started. (See NOTE.)

●

While driving

●

Steering wheel is
turned fully to either
sides

CAN communication line

TF-35

Accelerator pedal position signal

AWD solenoid

Mechanical malfunction of electric con-
trolled coupling (clutch sticking etc.)

Vehicle does not enter AWD mode even
though AWD warning lamp turned to OFF.

While driving

CAN communication line

TF-36

AWD solenoid

Mechanical malfunction of electric con-
trolled coupling (Mechanical engage-
ment of clutch is not possible.)

While driving, AWD warning lamp flashes
rapidly. (When flashing in approx. 1 minute
and then turning OFF.)
Rapid flashing: 2 times/second

While driving

Protection function is activated due to
heavy load to electric controlled cou-
pling. (AWD system is not malfunction-
ing. Also, optional distribution of torque
sometimes becomes rigid before lamp
flashes rapidly, but it is not malfunction.)

TF-37

While driving, AWD warning lamp flashes
slowly. (When continuing to flash until turn-
ing ignition switch OFF)
Slow flashing: 1 time/2 seconds

●

While driving

●

Vehicle speed: 20 km/h
(12 MPH) or more

Tire size is different between front and
rear of vehicle.

TF-37

Monitor item [Unit]

Content

Condition

Display value

FR RH SENSOR [km/h] or [mph]

Wheel speed (Front wheel
right)

Vehicle stopped

0.00 km/h (0.00 mph)

Vehicle running

CAUTION:

Check air pressure of tire under
standard condition.

Approximately equal to
the indication on speed-
ometer (Inside of

10%)

FR LH SENSOR [km/h] or [mph]

Wheel speed (Front wheel
left)

Vehicle stopped

0.00 km/h (0.00 mph)

Vehicle running

CAUTION:

Check air pressure of tire under
standard condition.

Approximately equal to
the indication on speed-
ometer (Inside of

10%)

TROUBLE DIAGNOSIS

TF-21

: The values are changed by throttle opening and engine speed.

: Mode switch is not equipped, but displayed.

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

NDS000DM

FUNCTION

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.

RR RH SENSOR [km/h] or [mph]

Wheel speed (Rear wheel
right)

Vehicle stopped

0.00 km/h (0.00 mph)

Vehicle running

CAUTION:

Check air pressure of tire under
standard condition.

Approximately equal to
the indication on speed-
ometer (Inside of

10%)

RR LH SENSOR [km/h] or [mph]

Wheel speed (Rear wheel
left)

Vehicle stopped

0.00 km/h (0.00 mph)

Vehicle running

CAUTION:

Check air pressure of tire under
standard condition.

Approximately equal to
the indication on speed-
ometer (Inside of

10%)

BATTERY VOLT [V]

Power supply voltage for
AWD control unit

Ignition switch: ON

Battery voltage

THRTL POS SEN [%]

Throttle opening condition

When depressing accelerator pedal
(Value rises gradually in response to
throttle position.)

0 - 100%

ETS SOLENOID [A]

Monitored value of current at
AWD solenoid

Engine running

●

At idle speed

Approx. 0.000A

Engine running

●

When depressing accelerator
pedal

Approx. 0.000 - 0.500A*

STOP LAMP SW [ON/OFF]

Condition of brake pedal
operation

Brake pedal: Depressed

Brake pedal: Released

OFF

ENG SPEED SIG [RUN/STOP]

Condition of engine running

Engine stopped
(Engine speed: Less than 400 rpm)

STOP

Engine running
(Engine speed: 400 rpm or more)

RUN

ETS ACTUATOR [ON/OFF]

Operating condition of AWD
actuator relay (integrated in
AWD control unit)

Engine stopped (Ignition
switch: ON)

OFF

Engine running

4WD WARN LAMP [ON/OFF]

AWD warning lamp condition

AWD warning lamp: ON

AWD warning lamp: OFF

OFF

4WD MODE SW*

[AUTO]

Input condition from mode
switch

Always

AUTO

4WD MODE MON [AUTO]

Control status of AWD

Engine running

AUTO

DIS-TIRE MONI [mm]

Improper size tire installed
condition

Vehicle running with normal size tire
installed

0-4 mm

Vehicle running with improper size
tire installed (Front/rear tire size dif-
ference, wear condition)

4-8 mm, 8- mm

P BRAKE SW [ON/OFF]

Condition of parking brake

Parking brake operated

Parking brake not operated

OFF

Monitor item [Unit]

Content

Condition

Display value

Diagnostic test mode

Function

Reference

page

Self-diagnostic results

●

Self-diagnostic results can be read and erased quickly.

TF-22

Data monitor

●

Input/Output data in the AWD control unit can be read.

TF-24

TF-22

TROUBLE DIAGNOSIS

CONSULT-II SETTING PROCEDURE

Refer to

GI-38, "CONSULT-II Start Procedure"

SELF-DIAG RESULT MODE
Operation Procedure

Perform “CONSULT-II Start Procedure”. Refer to

GI-38, "CONSULT-II Start Procedure"

Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.

Stop vehicle. With engine at idle, touch “SELF-DIAG RESULTS”.
Display shows malfunction experienced since the last erasing
operation.

NOTE:

●

The details for “TIME” are as follow:

–

“0”: Error currently detected with AWD control unit.

–

Except for “0”: Error detected in the past and memorized
with AWD control unit.
Detects frequency of driving after DTC occurs (frequency
of turning ignition switch “ON/OFF”).

Display Item List

CAUTION:

●

If “CAN COMM CIRCUIT [U1000]” is displayed with other DTCs, first perform the trouble diagnosis for CAN communica-
tion 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
turning 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

Perform applicably inspection of malfunctioning item and then repair or replace.

Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.

Make sure that ABS warning lamp turns OFF.

CAN diagnostic support monitor

●

The results of transmit/receive diagnosis of CAN communication can be read.

LAN-44

Active test

●

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from
the AWD control unit and also shifts some parameters in a specified range.

TF-25