Infiniti Q45. Manual - part 682

HEADLAMP AIMING CONTROL (AUTO)

LT-65

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SELF-DIAG RESULTS
Operation Procedure

1.

Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.

2.

Check display content in self-diagnostic results.

Description of DTC and Solutions after Detection

CONSULT-II can detect DTC (Diagnosis trouble code). The descriptions and solutions of DTC are listed
below. 

Details of error indica-

tion detected by 

CONSULT-II

Conditions of error detection

Code 

storage

Fail-safe

Reference

Within 5 seconds 

after starting vehi-

cle, or vehicle 

speed less than or 

equal to 4 km/h 

(2.84 MPH).

5 seconds and more 

after starting vehicle, 

or vehicle speed 

more than or equal 

to 4 km/h (2.84 

MPH).

[B2080]
[ECU TROUBLE]

ECU error of the headlamp 
aiming sensor.

YES

●

Fix headlamp aiming motor drive signal 
around 0 V.

●

Maintain a current position of light axis.

Replace headlamp 
aiming sensor, and 
initialize it. Refer to 

LT-76, "Removal and 
Installation"

 .

[B2081]
[INITIAL NOT DONE]

Initialization has not com-
pleted.

NO

Set and maintain light axis downward.

Refer to 

LT-72, "DTC 

B2081 [INITIAL NOT 
DONE]"

 .

[B2082]
[SENSOR OUT OF 
RANGE]

Vehicle height detected by 
headlamp aiming sensor is 
unusual.

Refer to 

LT-72, "DTC 

B2082 [SENSOR 
OUT OF RANGE], 
DTC B2083 [SEN SIG 
NOT PLAUSIBLE]"

 .

[B2083]
[SEN SIG NOT 
PLAUSIBLE]

Vehicle height detected by 
headlamp aiming sensor 
while running does not 
change more than 60-second 
stretch.

YES

Maintain a current position of light axis.

Refer to 

LT-72, "DTC 

B2082 [SENSOR 
OUT OF RANGE], 
DTC B2083 [SEN SIG 
NOT PLAUSIBLE]"

 .

[B2084]
[VOLTAGE UNDER 
LIMIT]

Voltage of headlamp aiming 
sensor terminal 2 kept having 
less than or equal to 9 V for 
1.5 seconds and over.

Set and maintain 
light axis down-
ward.

Maintain a current 

position of light axis.

Refer to 

LT-72, "DTC 

B2084 [VOLTAGE 
UNDER LIMIT]"

 .

[B2085]
[LOW BEAM SIG 
OPEN LINE]

Headlamp aiming sensor ter-
minal 6 had less than 6 V at 
lighting switch 1st, or had 
more than 2V for 1.5 sec-
onds or more at lighting 
switch OFF.

Refer to 

LT-73, "DTC 

B2085 [LOW BEAM 
SIG OPEN LINE]"

 .

[B2086]
[FRQ. OVER LIMIT]

Vehicle speed signal kept 
showing over 255 km/h (158 
MPH) for more than 1.5 sec-
onds. 

Refer to 

LT-73, "DTC 

B2086 [FRQ. OVER 
LIMIT]"

 .

[B2087]
[SHORT TO 
GROUND]

Headlamp aiming sensor ter-
minal 7 had short-circuit with 
a ground more than 1.5 sec-
onds.

Maintain a current position of light axis.

Refer to 

LT-74, "DTC 

B2087 [SHORT TO 
GROUND]"

 .

[B2088]
[SHORT TO BAT-
TERY]

Headlamp aiming sensor ter-
minal 7 had short-circuit with 
a power supply line more 
than 1.5 seconds.

Refer to 

LT-75, "DTC 

B2088 [SHORT TO 
BATTERY]"

 .

[B2089]
[NO CAR TYPE 
SELECTED]

Program error of the head-
lamp aiming sensor.

●

Fix headlamp aiming motor drive signal 
around 0 V.

●

Maintain a current position of light axis.

Replace headlamp 
aiming sensor, and 
initialize it. Refer to 

LT-76, "Removal and 
Installation"

 . 

LT-66

HEADLAMP AIMING CONTROL (AUTO)

CAUTION:

●

As for [B2083], codes are erased after detecting a change of vehicle height.

●

As for [B2084] to [B2086], fail-safe is performed in accordance with running condition when code is detected, and main-
tains the condition until ignition switch is turned off.
When ignition switch is turned on, fail-safe is set to “within 5 seconds after starting vehicle” or “vehicle speed less than
or equal to 4 km/h (2.84 MPH)”. Perform fail-safe only when having a current abnormality.

●

As for [B2084] to [B2088], perform fail-safe only when having a current abnormality.

HEADLAMP AIMING CONTROL (AUTO)

LT-67

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Check Aiming Control System

NKS0018B

*1

Refer to 

FSU-5, "FRONT SUSPEN-

SION ASSEMBLY"

  in “FSU section” 

and 

RSU-5, "REAR SUSPENSION 

ASSEMBLY"

  in“ RSU section”.

*2

Refer to 

LT-76, "Removal and Instal-

lation"

 .

*3

Refer to 

LT-65, "SELF-DIAG 

RESULTS"

 .

*4

Refer to 

LT-65, "Description of DTC 

and Solutions after Detection"

 . 

*5

Refer to 

LT-64, "ACTIVE TEST"

 .

*6

Refer to 

LT-33, "Removal and Instal-

lation"

  in “HEADLAMP (FOR USA)”.

PKIB1108E

LT-68

HEADLAMP AIMING CONTROL (AUTO)

CAUTION:

If the vehicle height is outside the proper height, aiming control may not be performed normally even
when the headlamp aiming control system is normal.

Symptom Chart

NKS0018C

*7

Refer to 

LT-63, "CONSULT-II Func-

tion (HEAD LAMP LEVELIZER)"

 .

*8

Refer to 

LT-55, "Headlamp Aiming 

Sensor Control Operation"

 .

*9

Refer to 

DI-15, "Terminals and Ref-

erence Value for Combination 
Meter"

  in “DI section”.

*10 Refer to 

DI-18, "Vehicle Speed Sig-

nal Inspection"

  in “DI section”.

*11 Refer to 

LT-64, "WORK SUPPORT"

 

.

Symptom

Reference

Headlamp aiming motor does not operate (Both sides)

Refer to 

LT-69, "Headlamp Aiming Motor Does Not Operate (Both Sides)"

 .

Headlamp aiming motor does not operate (One side)

Refer to 

LT-71, "Headlamp Aiming Motor Does Not Operate (One Side)"

 .