Infiniti M35/M45 Y50. Manual — part 908

ACTIVE AFS

LT-177

C

D

E

F

G

H

I

J

L

M

A

B

LT

7.

CHECK HEIGHT SENSOR GROUND

Check voltage between AFS control unit harness connector and
ground.

OK or NG

OK

>> GO TO 8.

NG

>> Check connector for connection, bend and loose fit. If it

is normal, replace AFS control unit. Refer to

LT-192, "Removal and Installation of AFS Control

Unit"

.

8.

CHECK HEIGHT SENSOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect AFS control unit connector and height sensor connector.

3.

Check continuity between AFS control unit harness connector
(A) and height sensor harness connector (B).

OK or NG

OK

>> Replace height sensor. Refer to

LT-193, "Removal and

Installation of Height Sensor"

.

NG

>> Repair harness or connector.

9.

CHECK DIAGNOSIS RESULT

Select “ADAPTIVE LIGHT” on CONSULT-II. Select “SELF-DIAG
RESULTS” on “SELECT DIAG MODE” screen.
Is DTC B2521 ECU CIRC detected?

YES

>> Refer to

LT-179, "DTC B2521 ECU CIRC"

.

NO

>> GO TO 10.

Terminals

Voltage

(Approx.)

(+)

(-)

AFS control unit

connector

Terminal

F110

8

Ground

0 V

PKIC0671E

A

B

Continuity

Connector

Terminal Connector

Terminal

F110

8

B468

3

Yes

PKIC0672E

SKIB4973E

LT-178

ACTIVE AFS

10.

CHECK HEIGHT SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect height sensor connector.

3.

Turn ignition switch ON.

4.

Check voltage between AFS control unit harness connector and
ground.

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 12.

11.

CHECK HEIGHT SENSOR SIGNAL CIRCUIT (SHORT CIRCUIT)

1.

Disconnect AFS control unit connector.

2.

Check continuity between AFS control unit harness connector
and ground.

OK or NG

OK

>> Replace height sensor. Refer to

LT-193, "Removal and

Installation of Height Sensor"

.

NG

>> Repair harness or connector.

12.

CHECK HEIGHT SENSOR POWER SUPPLY CIRCUIT (SHORT CIRCUIT)

1.

Turn ignition switch OFF.

2.

Disconnect AFS control unit connector.

3.

Check continuity between AFS control unit harness connector
and ground.

OK or NG

OK

>> Replace AFS control unit. Refer to

LT-192, "Removal

and Installation of AFS Control Unit"

.

NG

>> Repair harness or connector.

Terminals

Voltage

(Approx.)

(+)

(-)

AFS control unit

connector

Terminal

F110

6

Ground

4.0 - 6.0 V

PKIC0673E

AFS control unit

connector

Terminal

Ground

Continuity

F110

28

No

SKIB4970E

AFS control unit

connector

Terminal

Ground

Continuity

F110

6

No

PKIC0674E

ACTIVE AFS

LT-179

C

D

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F

G

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A

B

LT

DTC B2521 ECU CIRC

NKS003QR

1.

CHECK SENSOR POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check voltage between AFS control unit harness connector and
ground.

OK or NG

OK

>> GO TO 2.

NG

>>

●

If voltage is less than approx. 4 V, GO TO 3.

●

If voltage is more than approx. 6 V, GO TO 4.

2.

CHECK SENSOR SIGNAL

Check voltage between AFS control unit harness connector and
ground.

OK or NG

OK

>> Replace AFS control unit. Refer to

LT-192, "Removal

and Installation of AFS Control Unit"

.

NG

>>

●

If voltage is less than approx. 0.25 V, GO TO 5.

●

If voltage is more than approx. 4.75 V, GO TO 6.

3.

CHECK SENSOR POWER SUPPLY CIRCUIT (GROUND SHORT CIRCUIT)

1.

Turn ignition switch OFF.

2.

Disconnect AFS control unit connector.

3.

Check continuity between AFS control unit harness connector
and ground.

OK or NG

OK

>> Replace AFS control unit. Refer to

LT-192, "Removal

and Installation of AFS Control Unit"

.

NG

>> GO TO 7.

(+)

(-)

Voltage

(Approx.)

AFS control unit

connector

Terminal

F110

4

Ground

4.0 - 6.0 V

6

24

PKIC0675E

(+)

(-)

Voltage

(Approx.)

AFS control unit

connector

Terminal

F110

9

Ground

0.25 - 4.75 V

28

29

PKIC0676E

AFS control unit

connector

Terminal

Ground

Continuity

F110

4

No

6

24

PKIC0677E

LT-180

ACTIVE AFS

4.

CHECK SENSOR POWER SUPPLY CIRCUIT (IGN POWER SUPPLY SHORT CIRCUIT)

1.

Turn ignition switch OFF.

2.

Disconnect AFS control unit connector.

3.

Turn ignition switch ON.

4.

Check voltage between AFS control unit harness connector and
ground.

OK or NG

OK

>> Replace AFS control unit. Refer to

LT-192, "Removal

and Installation of AFS Control Unit"

.

NG

>> GO TO 8.

5.

CHECK SENSOR SIGNAL CIRCUIT (GROUND SHORT CIRCUIT)

1.

Turn ignition switch OFF.

2.

Disconnect AFS control unit connector.

3.

Check continuity between AFS control unit harness connector
and ground.

OK or NG

OK

>> Replace AFS control unit. Refer to

LT-192, "Removal

and Installation of AFS Control Unit"

.

NG

>> GO TO 7.

6.

CHECK SENSOR SIGNAL CIRCUIT (IGN POWER SUPPLY SHORT CIRCUIT)

1.

Turn ignition switch OFF.

2.

Disconnect AFS control unit connector.

3.

Turn ignition switch ON.

4.

Check voltage between AFS control unit harness connector and
ground.

OK or NG

OK

>> Replace AFS control unit. Refer to

LT-192, "Removal

and Installation of AFS Control Unit"

.

NG

>> GO TO 8.

(+)

(-)

Voltage

(Approx.)

AFS control

unit connector

Terminal

F110

4

Ground

0 V

6

24

PKIC0678E

AFS control unit

connector

Terminal

Ground

Continuity

F110

9

No

28

29

PKIC0679E

(+)

(-)

Voltage

(Approx.)

AFS control unit

connector

Terminal

F110

9

Ground

0 V

8

29

PKIC0680E