Infiniti FX35 / FX45. Manual - part 953

 

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Infiniti FX35 / FX45. Manual - part 953

 

 

TROUBLE DIAGNOSIS

TF-23

< SERVICE INFORMATION >

C

E

F

G

H

I

J

K

L

M

A

B

TF

N

O

P

×

: Standard

: Not applicable

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:

Do not continuously energize for a long time.

Monitored 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 signal is displayed.

FR LH SENSOR [km/h] or [mph]

×

×

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

RR RH SENSOR [km/h] or [mph]

×

×

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

RR LH SENSOR [km/h] or [mph]

×

×

Wheel speed calculated by rear wheel sensor LH 
signal 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 commu-
nication line is displayed.

ENG SPEED SIG [RUN/STOP]

Engine status is displayed.

ETS ACTUATOR [ON/OFF]

Operating condition of AWD actuator relay (inte-
grated in AWD control unit) is displayed.

4WD WARN LAMP [ON/OFF]

Control status of AWD warning lamp is displayed.

4WD MODE SW [AUTO]

AWD lock 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 communi-
cation line is displayed.

Test item

Condition

Description

ETS S/V
(Detects AWD solenoid valve)

• 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 0.20A
Qd: Decrease current value in increments of 0.20A
UP: Increase current value in increments of 0.02A
DOWN: Decrease current value in increments of 0.02A

TF-24

< SERVICE INFORMATION >

TROUBLE DIAGNOSIS FOR SYSTEM

TROUBLE DIAGNOSIS FOR SYSTEM

DTC C1201 CONTROLLER FAILURE

INFOID:0000000001327444

DIAGNOSTIC PROCEDURE

• Check the following if “CONTROLLER FAILURE [C1201]” is displayed in self-diagnostic results of CON-

SULT-III.

1.

PERFORM SELF-DIAGNOSIS

 With CONSULT-III

1.

Turn ignition switch “ON”. (Do not start engine.)

2.

Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT-III.

3.

Touch “ERASE”.

4.

Turn ignition switch “OFF” and wait at least 10 seconds.

5.

Perform the self-diagnosis again.

Is the “CONTROLLER FAILURE [C1201]” displayed?

YES

>> Replace AWD control unit. Refer to 

TF-35

.

NO

>> INSPECTION END

DTC C1203 ABS SYSTEM

INFOID:0000000001327445

DIAGNOSTIC PROCEDURE

• Check the following if “ABS SYSTEM [C1203]” is displayed in self-diagnostic results of CONSULT-III.

1.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to 

BRC-26, "Self-Diagnosis"

.

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 2.

2.

CHECK DTC AFTER DRIVING

1.

Turn ignition switch “OFF”.

2.

Start engine and drive vehicle at 30 km/h (19 MPH) for at least 1 minute.

3.

Make sure that ABS warning lamp turns OFF.

4.

Perform erase self-diagnostic results. Refer to 

TF-21, "CONSULT-III Function (ALL MODE AWD/4WD)"

.

5.

Stop vehicle and turn ignition switch “OFF”.

6.

Turn ignition switch “ON”.

7.

Perform self-diagnosis.

Is the “ABS SYSTEM [C1203]” displayed?

YES

>> GO TO 3.

NO

>> INSPECTION END

3.

CHECK AWD CONTROL UNIT

Check AWD control unit input/output signal. Refer to 

TF-20, "AWD Control Unit Input/Output Signal Reference

Value"

.

OK or NG

OK

>> GO TO 4.

NG

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

any items are damaged, repair or replace damaged parts.

4.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.

OK or NG

OK

>> INSPECTION END

NG

>> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to 

BRC-26,

"Self-Diagnosis"

.

TROUBLE DIAGNOSIS FOR SYSTEM

TF-25

< SERVICE INFORMATION >

C

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DTC C1204 4WD SOLENOID

INFOID:0000000001327446

CONSULT-III REFERENCE VALUE IN DATA MONITOR MODE

Data are reference value.

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

DIAGNOSTIC PROCEDURE

• Check the following if “4WD SOLENOID [C1204]” is displayed in self-diagnostic results of CONSULT-III.

1.

CHECK AWD SOLENOID SIGNAL

 With CONSULT-III

1.

Start engine.

2.

Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-III.

3.

Read out the value of “ETS SOLENOID”.

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

OK or NG

OK 

>> GO TO 6.

NG

>> GO TO 2.

2.

CHECK POWER SUPPLY 

1.

Turn ignition switch “OFF”.

2.

Disconnect AWD control unit harness connector.

3.

Turn ignition switch “ON”. (Do not start engine.)

4.

Check voltage between AWD control unit harness connector ter-
minal 9 and ground.

OK or NG

OK

>> GO TO 3.

NG

>>

Check the following. If any items are damaged, repair
or replace damaged parts.

• 10A fuse [No. 21, located in the fuse block (J/B)]
• Harness for short or open between battery and AWD

control unit harness connector terminal 9

3.

CHECK AWD SOLENOID CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect AWD control unit harness connector.

Monitored item [Unit]

Condition

Display value

ETS SOLENOID [A]

Engine running

At idle speed

Approx. 0.000A

When depressing accelerator pedal

Approx. 0.000 - 2.400A*

Condition

Display value

Engine running

At idle speed

Approx. 0.000A

When depressing accelerator 
pedal

Approx. 0.000 - 2.400A*

Connector

Terminal

Voltage (Approx.)

M92

9 - Ground

Battery voltage

SDIA1884E

TF-26

< SERVICE INFORMATION >

TROUBLE DIAGNOSIS FOR SYSTEM

3.

Check resistance between AWD control unit harness connector
terminals 1 and 2.

 OK or NG

 OK 

>>  GO TO 6.

 NG

>>  GO TO 4.

4.

CHECK AWD SOLENOID 

1.

Turn ignition switch “OFF”.

2.

Disconnect transfer assembly harness connector. 

3.

Check resistance between transfer assembly harness connector
F43 terminals 1 and 2.

OK or NG

OK

>> GO TO 5.

NG

>> AWD solenoid is malfunctioning. Replace electric con-

trolled coupling. Refer to 

TF-40, "Disassembly and

Assembly"

.

5.

CHECK HARNESS BETWEEN AWD CONTROL UNIT AND AWD SOLENOID

1.

Turn ignition switch “OFF”.

2.

Disconnect AWD control unit harness connector and transfer assembly harness connector.

3.

Check continuity between the following terminals.

-

AWD control unit harness connector M92 terminal 1 and transfer
assembly harness connector F43 terminal 1.

-

AWD control unit harness connector M92 terminal 2 and transfer
assembly harness connector F43 terminal 2.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

6.

CHECK AWD CONTROL UNIT

Check AWD control unit input/output signal. Refer to 

TF-20, "AWD Control Unit Input/Output Signal Reference

Value"

.

OK or NG

OK

>> GO TO 7.

NG

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

any items are damaged, repair or replace damaged parts.

7.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.

OK or NG

OK

>> INSPECTION END

NG

>> Replace AWD control unit.

COMPONENT INSPECTION

Connector

Terminal

 Resistance (Approx.)

M92

1 - 2 (Ground)

2.45 

SDIA1928E

1 - 2

: Approx. 2.45

SDIA2162E

1 - 1

: Continuity should exist.

2 - 2

: Continuity should exist.

SDIA2163E

 

 

 

 

 

 

 

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