Infiniti G37 Coupe. Manual - part 657

EXL-48

< COMPONENT DIAGNOSIS >

[XENON TYPE]

B2514 HEIGHT SENSOR UNUSUAL [RR]

Is the measurement value within the standard value?

YES

>> Replace AFS control unit.

Less than the standard value >>GO TO 3.
Higher than the standard value>>GO TO 6.

3.

CHECK HEIGHT SENSOR POWER SUPPLY CIRCUIT OUTPUT VOLTAGE

1.

Turn the ignition switch OFF.

2.

Disconnect the height sensor connector.

3.

Turn the ignition switch ON.

4.

Check the voltage between the height sensor harness connector and the ground.

Is the measurement value within the standard value?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK HEIGHT SENSOR SIGNAL OPEN 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 height sensor harness connec-
tor.

Does continuity exist?

YES

>> GO TO 5.

NO

>> Repair the harnesses or connectors.

5.

CHECK HEIGHT SENSOR SIGNAL SHORT CIRCUIT

Check continuity between the height sensor harness connector and the ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

NO

>> Replace the height sensor.

6.

CHECK HEIGHT SENSOR GROUND

Terminals

Voltage

(Approx.)

(+)

(

−

)

AFS control unit

Ground

Connector

Terminal

M16

28

0.25 - 4.75 V

Terminals

Voltage

(Approx.)

(+)

(

−

)

Height sensor

Ground

Connector

Terminal

B32

1

4 - 6 V

AFS control unit

Height sensor

Continuity

Connector

Terminal

Connector

Terminal

M16

28

B32

2

Existed

Terminals

Continuity

(+)

(

−

)

Height sensor

Ground

Connector

Terminal

B32

2

Not existed

B2514 HEIGHT SENSOR UNUSUAL [RR]

EXL-49

< COMPONENT DIAGNOSIS >

[XENON TYPE]

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

Is the measurement value within the standard value?

YES

>> GO TO 7.

NO

>> Replace AFS control unit.

7.

CHECK HEIGHT SENSOR GROUND CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect AFS control unit connector and the height sensor connector.

3.

Check continuity between the AFS control unit harness connector and the height sensor harness connec-
tor.

Does continuity exist?

YES

>> Replace the height sensor.

NO

>> Repair the harnesses or connectors.

Component Inspection

INFOID:0000000001604626

1.

CHECK HEIGHT SENSOR

1.

Remove the height sensor (the height sensor connector is connected).

2.

Start the engine.

3.

Turn the light switch 2ND.

4.

Select "HI SEN OTP RR” of AFS data monitor item.

5.

With moving the sensor lever, check the monitor status.

Is the output value normal?

YES

>> Height sensor is normal. 

NO

>> Replace the height sensor.

Terminals

Voltage

(Approx.)

(+)

(

−

)

AFS control unit

Ground

Connector

Terminal

M16

8

0 V

AFS control unit

Height sensor

Continuity

Connector

Terminal

Connector

Terminal

M16

8

B32

3

Existed

Monitor item

Condition

Monitor status

[Standard value 

(Approx.)]

HI SEN OTP RR

Sensor lever po-
sition

Contact with 
stopper

0.9 V

Moving be-
tween two posi-
tions

Smooth move-
ment

90

°

 from stopper

4.5 V

EXL-50

< COMPONENT DIAGNOSIS >

[XENON TYPE]

B2516 SHIFT SIGNAL [P, R]

B2516 SHIFT SIGNAL [P, R]

Description

INFOID:0000000001604627

AFS control unit receives the shift position signal from TCM with CAN communication.

DTC Logic

INFOID:0000000001604628

DTC DETECTION LOGIC

[B2516] Shift signal [P, R]

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.

Is “B2516” detected?

YES

>> Refer to 

EXL-50, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001604629

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-186, "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.

DTC detection condition

DTC erase condition

Possible causes

The shift position signal is not received.

Ignition switch OFF

• TCM
• AFS  control  unit

B2517 VEHICLE SPEED SIGNAL

EXL-51

< COMPONENT DIAGNOSIS >

[XENON TYPE]

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B2517 VEHICLE SPEED SIGNAL

Description

INFOID:0000000001604630

AFS control unit receives the vehicle speed signal from the unified meter and A/C amp. with CAN communica-
tion.

DTC Logic

INFOID:0000000001604631

DTC DETECTION LOGIC

[B2517] Vehicle speed signal

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.

Is “B2517” detected?

YES

>> Refer to 

EXL-51, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001604632

1.

UNIFIED METER AND A/C AMP. SELF-DIAGNOSIS

Check the self-diagnosis result with CONSULT-III. Check that the unified meter and A/C amp. does not detect
any DTCs.

Is any DTC detected?

YES

>> Check the unified meter and A/C amp. Refer to 

MWI-100, "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.

DTC detection condition

DTC erase condition

Possible causes

The vehicle speed signal is not received.

Ignition switch OFF

• Unified meter and A/C 

amp.

• AFS  control  unit