Infiniti G37 Coupe. Manual - part 656

EXL-44

< COMPONENT DIAGNOSIS >

[XENON TYPE]

B2503, B2504 SWIVEL ACTUATOR

Does continuity exist?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK SWIVEL MOTOR SHORT CIRCUIT

Check continuity between the AFS control unit harness connector and the ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

NO

>> GO TO 5.

5.

CHECK SWIVEL MOTOR CIRCUIT VOLTAGE OUTOPUT

1.

Connect AFS control unit connector. 

2.

Turn the ignition switch ON.

3.

Check the voltage between the AFS control unit harness connector and the ground.

RH

M16

11

E29

8

Existed

13

7

32

3

34

4

LH

M16

15

E59

3

17

4

36

8

38

7

Terminals

Continuity

(+)

(

−

)

AFS control unit

Ground

Connector

Terminal

RH

M16

11

Not existed

13

32

34

LH

M16

15

17

36

38

Terminals

Voltage

(Approx.)

(+)

(

−

)

AFS control unit

Ground

Connector

Terminal

RH

M16

11

9.5 - 11.5 V

13

32

34

LH

M16

15

17

36

38

B2503, B2504 SWIVEL ACTUATOR

EXL-45

< COMPONENT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Is the measurement value within the standard value?

YES

>> Replace the front combination lamp.

NO

>> Replace AFS control unit.

6.

CHECK SWIVEL POSITION SENSOR SIGNAL OUTPUT

Check the voltage between the AFS control unit harness connector and the ground.

Is the measurement value normal?

YES

>> GO TO 7.

NO

>> GO TO 9.

7.

CHECK SWIVEL POSITION SENSOR POWER SUPPLY CIRCUIT INPUT VOLTAGE

1.

Turn the ignition switch OFF.

2.

Disconnect the headlamp swivel actuator connector.

3.

Turn the ignition switch ON.

4.

Check the voltage between the headlamp swivel actuator harness connector and the ground.

Is the measurement value normal?

YES

>> GO TO 8.

NO

>> Repair the harnesses or connectors.

8.

CHECK SWIVEL POSITION SENSOR SIGNAL SHORT CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect AFS control unit connector. 

3.

Check continuity between the AFS control unit harness connector and the headlamp swivel actuator har-
ness connector.

Does continuity exist?

YES

>> Replace the front combination lamp.

NO

>> Repair the harnesses or connectors.

9.

CHECK SWIVEL POSITION SENSOR GROUND CIRCUIT VOLTAGE OUTPUT

Check the voltage between the AFS control unit harness connector and the ground.

Terminals

Voltage

(Approx.)

(+)

(

−

)

AFS control unit

Ground

Connector

Terminal

RH

M16

4

5 V

LH

24

Terminals

Voltage

(Approx.)

(+)

(

−

)

Headlamp swivel actuator

Ground

Connector

Terminal

RH

E29

2

5 V

LH

E59

2

AFS control unit

Headlamp swivel actua-

tor

Continuity

Connector

Terminal

Connector

Terminal

RH

M16

9

E29

1

Existed

LH

29

E59

1

EXL-46

< COMPONENT DIAGNOSIS >

[XENON TYPE]

B2503, B2504 SWIVEL ACTUATOR

Is the measurement value normal?

YES

>> GO TO 10.

NO

>> Replace AFS control unit.

10.

CHECK SWIVEL POSITION SENSOR SHORT GROUND CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect AFS control unit connector and the headlamp swivel actuator connector.

3.

Check continuity between the AFS control unit harness connector and the headlamp swivel actuator har-
ness connector.

Does continuity exist?

YES

>> Replace the front combination lamp.

NO

>> Repair the harnesses or connectors.

Component Inspection

INFOID:0000000001604622

1.

CHECK SWIVEL MOTOR SINGLE PART

1.

Disconnect the swivel actuator connector.

2.

Check the resistance among each swivel actuator connector terminal.

Is the measurement value normal?

YES

>> Swivel actuator is normal.

NO

>> Replace the front combination lamp.

Terminals

Voltage

(Approx.)

(+)

(

−

)

AFS control unit

Ground

Connector

Terminal

RH

M16

2

0 V

LH

27

AFS control unit

Headlamp swivel actua-

tor

Continuity

Connector

Terminal

Connector

Terminal

RH

M16

2

E29

6

Existed

LH

27

E59

6

Swivel actuator

Resistance

(Approx.)

Terminal

Terminal

3

7

7.2 

Ω

4

8

7.2 

Ω

3

4

10  M

Ω

 or more

B2514 HEIGHT SENSOR UNUSUAL [RR]

EXL-47

< COMPONENT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

B2514 HEIGHT SENSOR UNUSUAL [RR]

Description

INFOID:0000000001604623

The height sensor is installed to the rear suspension arm. The height sensor detects the suspension arm dis-
placement as the vehicle height change. The height sensor transmits the height sensor signal to AFS control
unit.
NOTE:
The sensor angle of the unloaded vehicle position is the reference value.

DTC Logic

INFOID:0000000001604624

DTC DETECTION LOGIC

[B2514] Height sensor unusual [RR]

DTC CONFIRMATION PROCEDURE

1.

DTC ERASE

Erase the DTC memory of AFS with CONSULT-III.

>> GO TO 2.

2.

DTC CONFIRMATION

1.

Start the engine.

2.

Turn the headlamp ON.

3.

Select the self-diagnosis with CONSULT-III.

Is "B2514" detected?

YES

>> Refer to 

EXL-47, "Diagnosis Procedure"

. 

NO

>> Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001604625

1.

CHECK HEIGHT SENSOR POWER SUPPLY OUTPUT

1.

Turn the ignition switch ON.

2.

Check the voltage between the AFS control unit harness connector and the ground.

Is the measurement value within the standard value?

YES

>> GO TO 2.

NO

>> Replace AFS control unit.

2.

CHECK HEIGHT SENSOR POWER SUPPLY INPUT

Check the voltage between the AFS control unit harness connector and the ground.

DTC detection condition

DTC erase condition

Possible cause

An applicable DTC is indicated when any of the following 
conditions is detected continuously for 2 seconds or more. 
• The height sensor power supply is 6 V or more, or 4 V or 

less.

• The height sensor signal is 0.25 V or less, or 4.75 V or 

more.

Ignition switch OFF

Height sensor
• Height sensor
• Harness and connector
• AFS  control  unit

Terminals

Voltage

(Approx.)

(+)

(

−

)

AFS control unit

Ground

Connector

Terminal

M16

6

4 - 6 V