Infiniti Q45. Manual - part 681

HEADLAMP AIMING CONTROL (AUTO)

LT-61

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LT

Terminals and Reference Values for Headlamp Aiming Sensor

NKS00187

How to Proceed with Trouble Diagnosis

NKS00188

1.

Confirm the symptom or customer complaint.

2.

Understand operation description and function description. Refer to 

LT-54, "System Description"

 .

3.

Perform the preliminary check. Refer to 

LT-62, "Preliminary Check"

 . 

4.

Perform self-diagnosis by CONSULT-II. Refer to 

LT-65, "SELF-DIAG RESULTS"

 .

5.

Check symptom and repair or replace the cause of malfunction.

6.

Does the headlamp aiming control operate normally? If YES: GO TO 7. If NO: GO TO 5.

7.

INSPECTION END

Terminal 

No.

Wire color

Signal

Measuring condition

Reference value

Ignition 

switch

Operation or condition

1

B

Ground

ON

—

Approx. 0

2

L

Ignition switch (ON)

ON

—

Battery voltage

4

G

Vehicle speed signal

ON

Approx. 40 km/h (25 MPH)

5

Y

K-line

—

—

—

6

LG

Tail lamp relay signal

—

Combination switch

OFF

Approx. 0 - 2 V

1ST

Battery voltage

7

R

Headlamp aiming motor 
drive signal

ON

Combination switch 1ST vehicle 
speed 0 km/h (0 MPH)

Approx. 2.5 - 7.8 V

PKIA1935E

LT-62

HEADLAMP AIMING CONTROL (AUTO)

Preliminary Check

NKS00189

CHECK POWER SUPPLY AND GROUND CIRCUIT

1. 

CHECK FUSE

Check for blown fuses.

Refer to 

LT-57, "Wiring Diagram —LT-H/AIM—"

 .

OK or NG

OK

>> GO TO 2.

NG

>> If the fuse is brown be sure to eliminate cause of malfunction before installing new fuse. Refer to

PG-2, "POWER SUPPLY ROUTING"

 .

2. 

CHECK HEADLAMP AIMING SENSOR VOLTAGE

1.

Turn ignition switch OFF.

2.

Disconnect headlamp aiming sensor connector.

3.

Turn ignition switch ON.

4.

Check voltage between headlamp aiming sensor harness con-
nector B622 terminal 2 and ground.

OK or NG

YES

>> GO TO 3.

NO

>> Repair harness and connector.

3. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between headlamp aiming sensor harness
connector B622 terminal 1 and ground.

OK or NG

OK

>> Replace headlamp aiming sensor.

NG

>> Repair harness or connector.

Unit

Power source

Fuse No.

Headlamp aiming sensor, headlamp aiming motor

Ignition switch ON or START

1

Headlamp aiming sensor

Battery

54

Headlamp battery saver control unit

6

2 - Ground

: Battery voltage

PKIB0113E

1 - Ground

: Continuity should exist.

PKIB0114E

HEADLAMP AIMING CONTROL (AUTO)

LT-63

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LT

CONSULT-II Function (HEAD LAMP LEVELIZER)

NKS0018A

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

CONSULT-II BASIC OPERATION PROCEDURE

CAUTION:

If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which performs CAN communication. 

1.

With the ignition switch OFF, connect “CONSULT-II” and “CON-
SULT-II CONVERTER” to the data link connector, and then turn
ignition switch ON.

2.

Touch “START (NISSAN BASED VHCL)”.

3.

Touch “HEAD LAMP LEVELIZER” on “SELECT SYSTEM”
screen. If “HEAD LAMP LEVELIZER” is not indicated, refer to

GI-37, "CONSULT-II Data Link Connector (DLC) Circuit"

 .

Diagnosis mode

Description

WORK SUPPORT

Headlamp aiming sensor can be initialized.

SELF-DIAG RESULTS

The result of self-diagnosis for headlamp aiming sensor can be displayed and erased.

ACTIVE TEST

Operation of headlamp aiming motor can be confirmed with “UP”, “MID” or “DOWN” touched.

ECU PART NUMBER

Headlamp aiming sensor part number can be read.

PKIB0601E

BCIA0029E

BCIA0030E

LT-64

HEADLAMP AIMING CONTROL (AUTO)

WORK SUPPORT
Work Support Item List

Operation Procedure

Headlamp aiming sensor initialize

1.

Set the vehicle in unload condition. (Removal all loads in passenger and trunk rooms.)

2.

Touch “HEAD LAMP LEVELIZER” on “SELECT SYSTEM” screen.

3.

Touch “WORK SUPPORT” on “SELECT DIAG MODE” screen.

4.

Touch “SENSOR INITIALISE”.

5.

Touch “WRITE”.

6.

“INITIALIZE COMPLETE” will be displayed.

7.

Touch “END”.

Instruction of initialized results

ACTIVE TEST
Operation Procedure

1.

Touch “HEAD LAMP LEVELIZER” on “SELECT SYSTEM” screen.

2.

Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.

3.

Touch “LAMP TEST”, then “UP”, “MID” or “DOWN” to change aiming line.

4.

Touch “END” after the test.

Display Item List

Item

Description

SENSOR INITIALISE

Make it memorize headlamp aiming sensor stroke of unloaded vehicle condition.
Perform when replacing headlamp aiming sensor.

Item

(CONSULT-II screen terms)

Description of indications

INITIALIZE COMPLETE

Initialization completed.

INCORRECT CONDITION

Improper condition. (Wrong connection of headlamp aiming sensor connector or 
CONSULT-II connector.)

NO CAR TYPE SELECT

Program error of the headlamp aiming sensor.

INITIALIZE NOT DONE

Initialization uncompleted.

Item

(CONSULT-II screen terms)

Test item

Description

LAMP TEST

Aiming direction change

Operation of headlamp aiming motor can be confirmed with 
“UP”, “MID” or “DOWN” touched.