Infiniti Q45. Manual - part 684

HEADLAMP AIMING CONTROL (AUTO)

LT-73

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LT

DTC B2085 [LOW BEAM SIG OPEN LINE]

NKS0018I

1. 

CHECK TAIL LAMP RELAY SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect headlamp aiming sensor connector.

3.

Turn ignition switch ON.

4.

Turn lighting switch 1st position. 

5.

Check voltage between headlamp aiming sensor harness con-
nector B622 terminal 6 and ground.

OK or NG

OK 

>> If the self-diagnosis result code [B2085] reappears when

performing the self-diagnosis again after erasing the
self-diagnosis result, replace and initialize the headlamp aiming sensor. Refer to 

LT-76, "Removal

and Installation"

  and 

LT-64, "WORK SUPPORT"

 . 

NG

>> Repair harness or connector.

DTC B2086 [FRQ. OVER LIMIT]

NKS0018J

1. 

CHECK VEHICLE SPEED

1.

Start engine and place vehicle in a driving condition.

2.

Check the waveform of voltage between combination meter har-
ness connector terminal 17 and body ground when the vehicle is
in driving condition at a speed of about 40 km/h (25 MPH).

OK or NG

OK 

>> If the self-diagnosis result code [B2086] reappears when performing the test drive after erasing

the self-diagnosis result, replace and initialize the headlamp aiming sensor. Refer to 

LT-76,

"Removal and Installation"

  and 

LT-64, "WORK SUPPORT"

 . 

NG >> Refer 

to 

DI-18, "Vehicle Speed Signal Inspection"

 .

6 - Ground

: Battery voltage

PKIB0125E

17 - Ground

: 

PKIB0123E

PKIA1935E

LT-74

HEADLAMP AIMING CONTROL (AUTO)

DTC B2087 [SHORT TO GROUND]

NKS0018K

1. 

CHECK SHORT CIRCUIT (1)

1.

Turn ignition switch OFF.

2.

Disconnect headlamp aiming sensor connector and front combi-
nation lamp connector LH and RH.

3.

Check continuity between headlamp aiming sensor harness
connector B622 terminal 7 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair harness or connector.

2. 

CHECK SHORT CIRCUIT (2)

1.

Connect front combination lamp connector RH only.

2.

Check continuity between headlamp aiming sensor harness
connector B622 terminal 7 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Replace front combination lamp assembly RH. Refer to

LT-33, "Removal and Installation"

 .

3. 

CHECK SHORT CIRCUIT (3)

1.

Disconnect front combination lamp connector RH.

2.

Connect front combination lamp connector LH.

3.

Check continuity between headlamp aiming sensor harness
connector B622 terminal 7 and ground.

OK or NG

OK

>> If the self-diagnosis result code [B2087] reappears when

performing the self-diagnosis again after erasing the
self-diagnosis result, replace and initialize the headlamp
aiming sensor. Refer to 

LT-76, "Removal and Installa-

tion"

  and 

LT-64, "WORK SUPPORT"

 .

NG

>> Replace front combination lamp assembly LH. Refer to 

LT-33, "Removal and Installation"

 .

7 - Ground

: Continuity should not exist.

PKIB0126E

7 - Ground 

: Continuity should not exist.

PKIB0126E

7 - Ground

: Continuity should not exist.

PKIB0126E

HEADLAMP AIMING CONTROL (AUTO)

LT-75

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DTC B2088 [SHORT TO BATTERY]

NKS0018L

1. 

CHECK SHORT CIRCUIT (1)

1.

Turn ignition switch OFF.

2.

Disconnect headlamp aiming sensor connector and front combi-
nation lamp connector LH and RH.

3.

Turn ignition switch ON.

4.

Check voltage between headlamp aiming sensor harness con-
nector B622 terminal 7 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair harness or connector.

2. 

CHECK SHORT CIRCUIT (2)

1.

Turn ignition switch OFF.

2.

Connect front combination lamp connector RH only.

3.

Turn ignition switch ON.

4.

Check voltage between headlamp aiming sensor harness con-
nector B622 terminal 7 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Replace front combination lamp assembly RH. Refer to

LT-33, "Removal and Installation"

 .

3. 

CHECK SHORT CIRCUIT (3)

1.

Turn ignition switch OFF.

2.

Disconnect front combination lamp connector RH.

3.

Connect front combination lamp connector LH.

4.

Turn ignition switch ON.

5.

Check continuity between headlamp aiming sensor harness
connector terminal 7 and ground.

OK or NG

OK

>> If the self-diagnosis result code [B2088] reappears when

performing the self-diagnosis again after erasing the
self-diagnosis result, replace and initialize the headlamp aiming sensor. Refer to 

LT-76, "Removal

and Installation"

  and 

LT-64, "WORK SUPPORT"

 .

NG

>> Replace front combination lamp assembly LH. Refer to 

LT-33, "Removal and Installation"

 .

7 - Ground

: Approx. 0 V

PKIB0127E

7 - Ground

: Approx. 0 V

PKIB0127E

7 - Ground

: Approx. 0 V

PKIB0127E

LT-76

HEADLAMP AIMING CONTROL (AUTO)

Removal and Installation

NKS0018M

REMOVAL

1.

Turn ignition switch OFF.

2.

Lift up the vehicle. 

3.

Disconnect headlamp aiming sensor connector.

4.

Remove nut of linkage rod on headlamp aiming sensor.

5.

Remove nuts headlamp aiming sensor.

6.

Remove headlamp aiming sensor from the bracket.

INSTALLATION

Installation is the reverse order of removal.

NOTE:
Initialize whenever replacing the headlamp aiming sensor. Refer to 

LT-64, "WORK SUPPORT"

 .

PKIA5327J