Infiniti QX56 (Z62). Manual - part 695

EXL-72

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

B2514 HEIGHT SENSOR UNUSUAL [RR]

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK HEIGHT SENSOR SIGNAL CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect AFS control unit connector. 

3.

Check continuity between AFS control unit harness connector and rear height sensor harness connector.

4.

Check continuity between AFS control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace rear height sensor. Refer to 

EXL-136, "Removal and Installation"

.

NO

>> Repair or replace harness.

4.

CHECK HEIGHT SENSOR POWER SUPPLY CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect AFS control unit connector. 

3.

Check continuity between AFS control unit harness connector and rear height sensor harness connector.

4.

Check continuity between AFS control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace AFS control unit. Refer to 

EXL-135, "Removal and Installation"

NO

>> Repair or replace harness.

5.

CHECK HEIGHT SENSOR GROUND CIRCUIT VOLTAGE OUTPUT

Check voltage between AFS control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace AFS control unit. Refer to 

EXL-135, "Removal and Installation"

6.

CHECK HEIGHT SENSOR GROUND OPEN CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect AFS control unit connector and rear height sensor connector.

3.

Check continuity between AFS control unit harness connector and rear height sensor harness connector.

AFS control unit

Rear height sensor

Continuity

Connector

Terminal

Connector

Terminal

M135

28

C15

2

Existed

AFS control unit

Ground

Continuity

Connector

Terminal

M135

28

Not existed

AFS control unit

Rear height sensor

Continuity

Connector

Terminal

Connector

Terminal

M135

6

C15

1

Existed

AFS control unit

Ground

Continuity

Connector

Terminal

M135

6

Not existed

(+)

(

−

)

Voltage

(Approx.)

AFS control unit

Connector

Terminal

M135

8

Ground

0 V

B2514 HEIGHT SENSOR UNUSUAL [RR]

EXL-73

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Is the inspection result normal?

YES

>> Replace rear height sensor. Refer to 

EXL-136, "Removal and Installation"

.

NO

>> Repair or replace harness.

AFS control unit

Rear height sensor

Continuity

Connector

Terminal

Connector

Terminal

M135

8

C15

3

Existed

EXL-74

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

B2516 SHIFT SIGNAL [P, R]

B2516 SHIFT SIGNAL [P, R]

DTC Logic

INFOID:0000000006213936

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC ERASE

Erase the DTC memory of AFS with CONSULT-III.

>> GO TO 2.

2.

DTC CONFIRMATION

1.

Turn ignition ON.

2.

Select the self-diagnosis with CONSULT-III.

3.

Check the self-diagnosis result. Refer to 

EXL-39, "DTC Index"

.

Is DTC “B2516” detected?

YES

>> Refer to 

EXL-74, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000006213937

1.

TCM SELF-DIAGNOSIS

Check the self-diagnosis result with CONSULT-III. Check that TCM does not detect any DTCs.
Is any DTC detected?

YES

>> Check TCM. Refer to 

TM-78, "DTC Index"

.

NO

>> GO TO 2.

2.

DTC ERASE

Erase the DTC memory of AFS with CONSULT-III.

Is the memory erased?

YES

>> INSPECTION END.

NO

>> Replace AFS control unit. Refer to 

EXL-135, "Removal and Installation"

DTC No.

Trouble diagnosis name

DTC detection condition

Possible causes

B2516

Shift signal [P, R]

The shift position signal is not received.

• TCM
• AFS control unit

B2517 VEHICLE SPEED SIGNAL

EXL-75

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

B2517 VEHICLE SPEED SIGNAL

DTC Logic

INFOID:0000000006213938

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC ERASE

Erase the DTC memory of AFS with CONSULT-III.

>> GO TO 2.

2.

DTC CONFIRMATION

1.

Turn ignition ON.

2.

Select the self-diagnosis with CONSULT-III.

3.

Check the self-diagnosis result. Refer to 

EXL-39, "DTC Index"

.

Is DTC “B2517” detected?

YES

>> Refer to 

EXL-75, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000006213939

1.

COMBINATION METER SELF-DIAGNOSIS

Check the self-diagnosis result with CONSULT-III. Check that the combination meter does not detect any
DTCs.

Is any DTC detected?

YES

>> Check the combination meter Refer to 

MWI-43, "DTC Index"

.

NO

>> GO TO 2.

2.

DTC ERASE

Erase the DTC memory of AFS with CONSULT-III.
Is the memory erased?

YES

>> INSPECTION END.

NO

>> Replace AFS control unit. Refer to 

EXL-135, "Removal and Installation"

DTC No.

Trouble diagnosis name

DTC detection condition

Possible causes

B2517

Vehicle speed signal

The vehicle speed signal is not re-
ceived.

• Combination meter
• AFS control unit