Nissan Teana J32. Manual - part 518

EXL-42

< COMPONENT DIAGNOSIS >

[XENON TYPE]

B2084 VOLTAGE UNDER LIMIT

B2084 VOLTAGE UNDER LIMIT

DTC Logic

INFOID:0000000003805608

DTC DETECTION LOGIC

[B2084] VOLTAGE UNDER LIMIT

DTC CONFIRMATION PROCEDURE

1.

ERASE DTC

Erase DTC memory of headlamp levelizer with self-diagnosis of CONSULT-III.

>> GO TO 2.

2.

DTC CONFIRMATION

1.

Turn the ignition switch ON.

2.

Perform self-diagnosis of CONSULT-III.

Is B2084 detected?

YES

>> Refer to 

EXL-42, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003805609

1.

CHECK POWER SUPPLY WITH CONSULT-III

1.

Turn ignition switch ON.

2.

Turn the lighting switch 1ST.

3.

Select "INT SEN VOLT" of HEADLAMP LEVELIZER data monitor item.

4.

Check the monitor status.

Is the measurement value normal?

YES

>> Replace the auto levelizer control unit.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check power supply and ground circuit of auto levelizer control unit. Refer to 

EXL-51, "AUTO LEVELIZER

CONTROL UNIT : Diagnosis Procedure"

.

Is power supply and ground circuit normal?

YES

>> Replace the auto levelizer control unit.

NO

>> Repair or replace the malfunctioning part.

DTC detection condition

DTC erase conditions

Possible causes

Ignition power supply to auto levelizer control unit is 9 V or less for 
1.5 seconds or more.

Ignition switch OFF

• Harness or connector
• Auto levelizer control unit

Monitor item

Standard value

(Approx.)

INT SEN VOLT

Battery voltage

B2085 LOWBEAM SIG OPEN LINE

EXL-43

< COMPONENT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

B2085 LOWBEAM SIG OPEN LINE

Description

INFOID:0000000003805610

• Auto levelizer control unit inputs tail lamp signal from IPDM E/R.
• Auto levelizer control unit always outputs the voltage to detect the DTC.

DTC Logic

INFOID:0000000003805611

DTC DETECTION LOGIC

[B2085] LOWBEAM SIG OPEN LINE

DTC CONFIRMATION PROCEDURE

1.

ERASE DTC

Erase DTC memory of headlamp levelizer with self-diagnosis of CONSULT-III.

>> GO TO 2.

2.

DTC CONFIRMATION

1.

Turn the ignition switch ON.

2.

Turn the lighting switch 1ST.

3.

Perform self-diagnosis of CONSULT-III.

Is B2085 detected?

YES

>> Refer to 

EXL-43, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003805612

1.

CHECK TAIL LAMP SIGNAL INPUT WITH CONSULT-III

1.

Turn ignition switch ON.

2.

Select "LIGHT SIGNAL" of HEADLAMP LEVELIZER data monitor item.

3.

With operating the lighting switch, check the monitor status.

Is the measurement value normal?

YES

>> Replace the auto levelizer control unit.

NO

>> GO TO 2.

2.

CHECK TAIL LAMP SIGNAL INPUT

1.

Turn ignition switch OFF.

2.

Disconnect the auto levelizer control unit connector.

3.

Turn ignition switch ON.

4.

With operating the lighting switch, check the voltage between the auto levelizer control unit harness con-
nector and the ground.

DTC detection condition

DTC erase conditions

Possible causes

Auto levelizer control unit detected that the tail lamp signal is the fol-
lowing condition:
2 V < tail lamp signal < 6 V 

Ignition switch OFF

• Harness or connector
• IPDM E/R
• Auto levelizer control unit

Monitor item

Condition

Standard value

(Approx.)

Lighting switch

LIGHT SIGNAL

OFF

2 V or less

1ST

6 V or more

EXL-44

< COMPONENT DIAGNOSIS >

[XENON TYPE]

B2085 LOWBEAM SIG OPEN LINE

Is the measurement value normal?

YES

>> Replace the auto levelizer control unit.

NO

>> Repair the harnesses between auto levelizer control unit and IPDM E/R.

Terminals

Condition

Voltage

(Approx.)

(+)

(

−

)

Auto levelizer control unit

Ground

Connector

Terminal

Lighting switch

C8

6

OFF

0 V

1ST

Battery voltage

B2086 FRQ. OVER LIMIT

EXL-45

< COMPONENT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

B2086 FRQ. OVER LIMIT

Description

INFOID:0000000003805613

Auto levelizer control unit inputs vehicle speed signal (8-pules) from combination meter.

DTC Logic

INFOID:0000000003805614

DTC DETECTION LOGIC

[B2086] FRQ. OVER LIMIT

DTC CONFIRMATION PROCEDURE

1.

ERASE DTC

Erase DTC memory of HEADLAMP LEVELIZER with self-diagnosis of CONSULT-III.

>> GO TO 2.

2.

DTC CONFIRMATION

1.

Start the engine.

2.

Drive the vehicle at 40 km/h (25 MPH).

3.

Perform self-diagnosis of CONSULT-III.

Is B2086 detected?

YES

>> Refer to 

EXL-45, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003805615

1.

CHECK VEHICLE SPEED SIGNAL INPUT WITH CONSULT-III

1.

Turn ignition switch ON.

2.

Select "SPEED SIG" of HEADLAMP LEVELIZER data monitor item.

3.

While driving at 40 km/h (25 MPH), check the monitor status.

Is the measurement value normal?

YES

>> Replace the auto levelizer control unit.

NO

>> GO TO 2.

2.

CHECK VEHICLE SPEED SIGNAL INPUT

1.

Turn ignition switch OFF.

2.

Disconnect the auto levelizer control unit connector.

3.

Turn ignition switch ON.

4.

While driving at 40 km/h (25 MPH), check the voltage between the auto levelizer control unit harness con-
nector and the ground.

DTC detection condition

DTC erase conditions

Possible causes

Auto levelizer control unit detected that vehicle speed signal is ab-
normal. [The vehicle speed is 340 km/h (211 MPH) or more for 1.5 
seconds or more.]

Ignition switch OFF

• Harness or connector
• Auto levelizer control unit

Monitor item

Condition

Standard value

(Approx.)

SPEED SIG

While driving at 40 km/h 

(25 MPH)

40 km/h (25 

MPH)