Nissan X-Trail 32. Manual - part 1214

B20CF HEADLAMP (HI) RH POWER SUPPLY CIRCUIT

EXL-313

< DTC/CIRCUIT DIAGNOSIS >

[HALOGEN HEADLAMP]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Is the inspection result normal?

YES

>> Replace headlamp (HI) RH bulb. Refer to 

EXL-376, "Replacement"

.

NO

>> Repair or replace the headlamp (HI) RH harness.

Front combination lamp RH

Resistance

Terminal

6

5

Except  0 

Ω

EXL-314

< DTC/CIRCUIT DIAGNOSIS >

[HALOGEN HEADLAMP]

B20D0 HEADLAMP (LO) LH POWER SUPPLY CIRCUIT

B20D0 HEADLAMP (LO) LH POWER SUPPLY CIRCUIT

DTC Description

INFOID:0000000010789839

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connector
• Headlamp (LO) LH bulb
• Headlamp (LO) LH harness
• IPDM E/R

FAIL-SAFE

Shuts off the power supply to the headlamp (LO) LH power supply circuit until the headlamp (LO) ON condi-
tions are no longer satisfied.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

With CONSULT

1.

Turn ignition switch ON.

2.

Select “HL (LO) LH CIRC MALFUNCTN” in “Data Monitor” mode of “IPDM E/R” using CONSULT.

3.

Check the monitor status.

What is the monitor status?

“0”

>> GO TO 2.

“1”

>> A short circuit is detected multiple times in the headlamp (LO) LH power supply circuit, and dam-

age accumulates at the smart FET inside the IPDM E/R. For this reason, IPDM E/R does not turn
ON the smart FET. Because the DTC cannot be reproduced in this state, perform 

EXL-314, "Diag-

nosis Procedure"

 and replace IPDM E/R after the malfunctioning part is repaired. Refer to 

PCS-

60, "Removal and Installation"

. 

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch OFF.

2.

Turn ignition switch ON.

3.

Turn lighting switch 2ND.

4.

Select “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT.

5.

Check DTC.

Is DTC detected?

YES

>> Refer to 

EXL-314, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010789840

1.

CHECK HEADLAMP (LO) LH POWER SUPPLY CIRCUIT (SHORT)

1.

Turn ignition switch OFF.

2.

Turn lighting switch OFF.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B20D0

HL (LO) LH PWR SPLY CIRC
[Headlamp (low) left hand power supply cir-
cuit]

[CIRC 
SHORT TO 
GRND]

When headlamp (LO) ON conditions are satisfied (smart 
FET inside IPDM E/R is ON), and overcurrent is detected 
in the headlamp (LO) LH power supply circuit.

Monitor item

Monitor status

HL (LO) LH CIRC MALFUNCTN

0

1

B20D0 HEADLAMP (LO) LH POWER SUPPLY CIRCUIT

EXL-315

< DTC/CIRCUIT DIAGNOSIS >

[HALOGEN HEADLAMP]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

3.

Disconnect IPDM E/R connector and front combination lamp LH connector.

4.

Check continuity between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace harness.

2.

CHECK HEADLAMP (LO) LH POWER SUPPLY

With CONSULT

1.

Connect IPDM E/R connector.

2.

Turn ignition switch ON

3.

Select “HEADLAMP (LO)” in “Active Test” mode of “IPDM E/R” using CONSULT.

4.

With operating the test items, check the voltage between front combination lamp LH harness connector
and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace IPDM E/R. Refer to 

PCS-60, "Removal and Installation"

.

3.

CHECK HEADLAMP (LO) LH

Check the headlamp (LO) LH bulb. Refer to 

EXL-315, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace the malfunctioning part.

Component Inspection

INFOID:0000000010789841

1.

CHECK HEADLAMP (LO) LH

1.

Turn ignition switch OFF.

2.

Disconnect front combination lamp LH connector.

3.

Check resistance of front combination lamp LH terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK HEADLAMP (LO) LH

1.

Remove headlamp (HI) LH bulb.

2.

Check resistance of front combination lamp LH terminals.

IPDM E/R 

—

Continuity

Connector

Terminal

E148

50

Ground

Not existed

+

-

Test item

Voltage

Front combination lamp LH

Connector

Terminal

E154

7

Ground

HEADLAMP 
(LO)

On

9 – 16 V

Off

0 – 1 V

Front combination lamp LH

Resistance

Terminal

7

8

Except  0 

Ω

EXL-316

< DTC/CIRCUIT DIAGNOSIS >

[HALOGEN HEADLAMP]

B20D0 HEADLAMP (LO) LH POWER SUPPLY CIRCUIT

Is the inspection result normal?

YES

>> Replace headlamp (LO) LH bulb. Refer to 

EXL-376, "Replacement"

.

NO

>> Repair or replace the headlamp (LO) LH harness.

Front combination lamp LH

Resistance

Terminal

7

8

Except 0 

Ω